ZIB

1

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Increase of “antianxiety” activity and tolerance of behavioral depression during chronic administration of oxazepam (1968)

Margules, D. L. ; Stein, Larry

Springer

Psychopharmacology 13 (1968), S. 74-80

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ISSN: 1432-2072

Keywords: Benzodiazepines ; Psychopharmacology ; Antianxiety ; Drug Tolerance

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary Oxazepam has two opposing actions on behavior: a responsedecreasing or depressant action and a response-increasing or disinhibitory action. The course of the two actions in chronic dosing was determined in rats in a test in which punished and unpunished schedules of reinforcement were alternated. The depressant action (measured by a decrease in the rate of unpunished behavior) was observed to undergo tolerance after 3–4 doses, while the disinhibitory action (measured by an increase in the rate of punished behavior) failed to show tolerance and even increased throughout the chronic series. The selective tolerance of the depressant action is probably due to neuronal adaptation, but changes in metabolism also may be involved. The increase in the rate of punished behavior is attributed, at least in part, to a progressive unmasking of the disinhibitory action as tolerance to the depressive action develops.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00401620

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2

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Sample selection by diagnosis in clinical drug evaluations (1968)

Sandifer, Myron G. ; Fleiss, Joseph L. ; Green, Linda M.

Springer

Psychopharmacology 13 (1968), S. 118-128

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ISSN: 1432-2072

Keywords: Psychopharmacology ; Diagnosis ; Sampling Studies ; Statistics

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary Theoretical models for sample selection by diagnosis using one, one-out-of-two, two, two-out-of-three, and three concurring opinions are illustrated. These models are then applied to two categories, schizophrenia and depressive disorders, for an actual sample of patients diagnosed by multiple observers. The conclusion is reached that sample selection by a single opinion is not sufficiently reliable for research studies. The choice of alternative methods of selection depends on the needs of a particular study. Samples chosen on the basis of two-out-of-three concurring opinions provide the least total error. When erroneous inclusions are particularly undesirable, higher degrees of consensus—e.g. agreeing pairs or triplets—are necessary.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00404809

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3

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Effect of imipramine, physostigmine and amphetamine on the electrical activity of the brain in the cat (1968)

Dasberg, Haim ; Feldman, Shaul

Springer

Psychopharmacology 13 (1968), S. 129-139

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ISSN: 1432-2072

Keywords: Electroencephalography ; Psychopharmacology ; Imipramine ; Amphetamine ; Physostigmine

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary The results of the interaction of imipramine, physostigmine and d/l amphetamine in various intravenously administered dosages were studied on the cortical and subcortical electrical activity of cats. Imipramine was shown to cause a cortical synchronization, hippocampal desynchronization, rise in the threshold of electrocortical arousal and limbic convulsive activity which was potentiated by amphetamine. Imipramine increased the amount of physostigmine, but decreased the amount of amphetamine needed for cortical desynchronization. The possible significance of these findings for the neuropsychopharmacological action of imipramine is briefly discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00404810

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4

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Influencing the human indoleamine metabolism by means of a chlorinated amphetamine derivative with antidepressive action (p-Chloro-N-Methylamphetamine) (1968)

Praag, H. M. ; Korf, J. ; Woudenberg, F. ; [et al.]

Springer

Psychopharmacology 13 (1968), S. 145-160

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ISSN: 1432-2072

Keywords: Indoleamine Metabolism ; Psychopharmacology ; Antidepressive Drugs ; Amphetamine Derivatives (Chlorinated) ; Depression

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary CMA (p-chloro-N-methylamphetamine) lowers the cerebral 5-HT concentration in test animals but has virtually no effect on the catecholamine concentrations. Moreover, this compound was found to behave in depressive patients like an antidepressive drug, not like a central stimulant of the amphetmine type. The study described was conducted in order to establish whether CMA influences the overall metabolism of indoleamines in man. Such an influence was clearly demonstrable. Our findings are consistent with the hypothesis that CMA releases 5-HT from its depots. It has not been explained why a considerable proportion of the released 5-HT is excreted unchanged and why the increase in 5-HIAA excretion is so small: the overall activity of MAO was found not to be inhibited. No indications of abnormal 5-HT degradation were found at this time. Patients with vital depressions who improved on CMA medication showed a lower 5-HIAA excretion before treatment than did patients who were refractory to CMA treatment. This is consistent with earlier observations. The possible cause of this phenomenon is discussed. Among the various possibilities considered, an abnormal 5-HT metabolism is regarded as the most plausible. Pertinent investigations are being continued.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00404812

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The mechanism of fixation prevention and “Dissociation” learning with chlordiazepoxide (1968)

Feldman, Robert S.

Springer

Psychopharmacology 12 (1968), S. 384-399

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ISSN: 1432-2072

Keywords: Psychopharmacology ; Tranquilizing Agents ; Chlordiazepoxide ; Frustration ; Animal Behavior

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary This experiment investigated the possibility that chlordiazepoxide (CDP) has unique properties that account for state dependent learning, and prevention of conflict-induced behavior fixations. One group of rats were given a discrimination problem on a Lashley jumping stand, but on even days all responses were punished. Another group were treated the same way except than on even days all responses were rewarded. Each of these groups were subdivided, half of the Ss were given CDP on even days, the other half no drug. The results showed that punishment on even days for the response to be learned disrupted learning more than reward for responses that were to be avoided. CDP practically eliminated these disruptive effects and aided learning for the punishment group, but led to a slower rate of learning for the reward group. These findings confirmed the hypothesis that CDP attenuates the effects of negative incentives, and that this property accounts for the drug's cue value in discrimination learning and for its fixation prevention characteristics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00401344

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6

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Effects of cholinergic drugs on poor performance of rats in a shuttle-box (1968)

Rech, Richard H.

Springer

Psychopharmacology 12 (1968), S. 371-383

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ISSN: 1432-2072

Keywords: Psychopharmacology ; Cholinergic Blocking Drugs ; Animal Behavior ; Scopolamine ; Conditioned Reflex

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary Atropine or scopolamine improved conditioned avoidance behavior for most rats which performed poorly, in spite of extensive training, in a shuttle-box procedure. As previously reported, d-amphetamine also improved performance in many of these animals, but there was no particular relationship between a rat's responses to the cholinergic blocking agents and to d-amphetamine. The effect of any one of the 3 agents was, for the most part, reversible after the drug effect had dissipated. Physostigmine was quite potent in disrupting avoidance behavior in rats that performed well in the shuttle-box, even in animals that were overtrained. This impairment was antagonized by atropine or scopolamine, partly antagonized by d-amphetamine, and not antagonized by methyl atropine. Poor performers were found to be very sensitive to the disruptive effects of physostigmine, losing much of their escape behavior after relatively small doses. The results are interpreted as evidence for a central cholinergic system with inhibitory influences for modulating stimulus-response patterns. Under normal circumstances this inhibitory system probably functions in an integrated manner with the adrenergic mobilizing system for the central control of learned behavior. Centrally-active anticholinergic drugs of the muscarinic type appear to influence behavioral responses by inducing a response disinhibition.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00401343

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7

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Interactions of monoamine oxidase inhibitors and reserpine: an EEG, gross behavioral and biochemical analysis (1968)

Bueno, J. R. ; Pscheidt, G. R. ; Himwich, H. E.

Springer

Psychopharmacology 12 (1968), S. 400-413

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ISSN: 1432-2072

Keywords: Psychopharmacology ; Electrophysiology ; Arousal ; Animal Behavior ; Brain Biogenic Amines

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary We have studied the interactions of reserpine and the monoamine oxidase inhibitors, nialamide and isocarboxazid, in rabbits. EEG recordings were made from animals with acute and chronically implanted electrodes. Gross behavioral observations were made in freely moving rabbits and brain amine concentrations of norepinephrine and serotonin were also determined. Emphasis was placed on observing drug effects over periods of time ranging up to 13 days. Rabbits given isocarboxazid or nialamide alone exhibit a phenomenon rarely seen in the control animals, namely partial activation, an EEG pattern in which slow waves of high amplitude are maintained in the cortex while fast activity appears in subcortical structures. This effect was also observed in rabbits treated with nialamide and reserpine in combination. By appropriate dosage schedules in which reserpine was administered to animals pretreated with monoamine oxidase inhibitors it was possible to maintain extended periods of frank arousal or EEG activation over a period of several days. The absolute concentrations of brain amines bore little or no relationship to the EEG effects observed, however, increased ratios of serotonin to norepinephrine were observed in conjunction with EEG activation and signs of behavioral excitement.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00401345

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Drug effects on motor coordination (1968)

Watzman, Nathan ; Barry, Herbert

Springer

Psychopharmacology 12 (1968), S. 414-423

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ISSN: 1432-2072

Keywords: Psychopharmacology ; Barbiturates ; Phenothiazines ; Animal Behavior ; Motor Coordination

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary The rotarod test of motor coordination in mice was modified by increasing the rotation speed every 30 sec until the animals fell off. This procedure yielded a stable, proficient level of performance within four brief trials; the approximately normal distribution of performance times provided an equivalent measure of either improvement or impairment caused by drugs and permitted the use of parametric statistical tests. A total of 240 mice were assigned to 20 different groups of 12 each, administered oral doses of placebo or different drugs, prior to trial 4. The use of a ratio score (performance time in trial 4 divided by the same animal's time in trial 3) provided a measure of drug-induced changes, controlling for individual differences among animals in over-all level of performance. Two phenothiazines (chlorpromazine and perphenazine) impaired performance at low doses, with a progressively greater decrement at increasing doses (4, 8, 16 mg/kg); 2 barbiturates (pentobarbital and amobarbital) showed an all-or-none effect, with no significant decrement at the lower doses (20 and 40 mg/kg) but almost complete incapacitation at the highest dose of 80 mg/kg. Performance superior to the placebo condition was found with the 2 lower doses of pentobarbital and with 3 d-amphet-amine doses (4, 8, 16 mg/kg). An analysis of individual differences gave evidence that the animals which were inferior in prior performance were more susceptible to both improvement and impairment of performance under the influence of drugs.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00401346

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9

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Effect of DDT or Parathion on condition avoidance response of offspring from DDT or Parathion treated mothers (1968)

Al-Hachim, Ghazi M. ; Fink, Gregory B.

Springer

Psychopharmacology 12 (1968), S. 424-427

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ISSN: 1432-2072

Keywords: Central Nervous System ; Psychopharmacology ; DDT ; Parathion

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary The offspring of female mice treated with 2.5 mg/kg DDT during the second or third trimester of pregnancy showed a delayed acquisition of the conditioned avoidance response. If DDT was given in the first trimester, or if 3 mg/kg of Parathion was given during the pregnancy, no effect on the conditioned avoidance response of the off-spring was seen.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00401347

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10

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Neuroleptic action of quaternary chlorpromazine and related drugs injected into various brain areas in rats (1968)

Fog, R. L. ; Randrup, A. ; Pakkenberg, H.

Springer

Psychopharmacology 12 (1968), S. 428-432

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ISSN: 1432-2072

Keywords: Ganglia, Basal ; Psychopharmacology ; Chlorpromazine ; Amphetamine ; Dopamine

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary In rats micro-injections in corpus striatum of quaternary chlorpromazine and related drugs give rise to highly characteristic neuroleptic effects: antagonism of amphetamine-induced stereotyped behaviour and development of catalepsy. There is no effect of injections in hippocampus or septum. Dopaminergic mechanisms in corpus striatum seem to play a central role in neuroleptic action.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00401348

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11

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The effects of amphetamine on the sleep-wakefulness cycle of developing kittens (1968)

Shimizu, Akira ; Himwich, Harold E.

Springer

Psychopharmacology 13 (1968), S. 161-169

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ISSN: 1432-2072

Keywords: Sleep-wakefulness Cycle ; Amphetamine ; Psychopharmacology ; Growing Animals ; Electrencephalography

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary 1. The effects of amphetamine on the sleep-wakefulness cycle were studied in 48 kittens during the growth period of 1–28 days of age. Recordings of EEG, EMG of the posterior neck muscles and respiratory rhythms were made as well as observations of gross behavior. 2. Percent time of wakefulness was increased with amphetamine (0.3 mg/kg). This effect became more marked with age, i.e., being more significant after 16 to 18 days of age (P〈0.005) than before (P〈0.05). These increases in the intensity of the effect during growth may be related to the postnatal development of the structures responsible for wakefulness. 3. Percent time of “activated” sleep was diminished significantly at all ages including the newborns (P〈0.005). This lack of the influence of age suggests that the structures responsible for “activated” sleep are well developed at birth. 4. The increase of percent time of slow wave sleep was observed. This increase is regarded as a “passive” manifestation of time left available after a severe diminution of “activated” sleep time and relatively slight increase of wakefulness time during amphetamine medication.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00404813

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12

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A comparison of the effects of nicotine and physostigmine on a measure of activity in the rat (1968)

Morrison, Cathleen F. ; Lee, Peter N.

Springer

Psychopharmacology 13 (1968), S. 210-221

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ISSN: 1432-2072

Keywords: Psychopharmacology ; Animal Behaviour ; Nicotine ; Physostigmine ; Motor Activity

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary Rats of 3 strains were observed at regular intervals and their activity was recorded using four categories of behaviour-rearing, moving, grooming and immobile. Strain differences in control activity were found. Nicotine and physostigmine reduced the activity of the more active rats and increased that of the less active animals. Rearing behaviour was particularly susceptible to depression by both drugs. The similarity of effect of the two drugs supports the hypothesis that one of the actions of nicotine in the brain is the release of acetylcholine.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00401401

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13

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Some observations suggesting preservation of skilled motor acts despite drug-induced stress (1968)

Heimann, Hans ; Reed, Charles F. ; Witt, Peter N.

Springer

Psychopharmacology 13 (1968), S. 287-298

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ISSN: 1432-2072

Keywords: Motion Pictures ; Motor Skills ; Eye Movements ; Psychopharmacology ; Psychological Tests

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary Measures of skilled motor performances, both of a task-oriented (tests of eye-hand coordination) and incidental (control of facial and ocular muscles) nature were recorded for a sample of 20 healthy young adults before and after single administrations of perphenazine, opipramol, imipramine and placebo at doselevels commonly supposed to produce mood or behavioral effects. It was anticipated that such performances would be sensitive even to slight changes in the subjects' physiological and psychological state; the aim was to test the power of tests of subtle skills in providing indices of slight to moderate behavioral effects. The performance measures remained surprisingly little affected by all drugs, despite their sensitivity to drug-independent improvement in performance throughout the experimental day, and despite evidences of drug-related effects, especially for imipramine and opipramol, in simple objective physiological measures, and for imipramine alone in subjective measures taken concurrently. There may be a class of skilled sensory-motor acts, particularly those related to well-learned daily activities, which, rather than being vulnerable to adverse effect, remain efficient even in the presence of signs of disturbance of bodily function.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00414340

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14

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Lack of cross-tolerance in rats among (−) Δ9-trans-tetrahydrocannabinol (Δ9-THC), cannabis extract, mescaline and lysergic acid diethylamide (LSD-25) (1968)

Silva, M. Teresa A. ; Carlini, E. A. ; Claussen, U. ; [et al.]

Springer

Psychopharmacology 13 (1968), S. 332-340

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ISSN: 1432-2072

Keywords: Cannabis ; Lysergic Acid Diethylamide ; Mescaline ; Hallucinogens ; Psychopharmacology

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary Using climbing rope and bar-pressing behavior methods, rats were rendered tolerant to Δ 9-THC, cannabis extract, mescaline and LSD-25. Cross-tolerance experiments showed that rats refractory to Δ 9-THC and cannabis extract were still sensitive to mescaline and LSD-25, and vice-versa. These results suggest that, in spite of the similarity of the clinical symptoms produced in man by the 3 drugs, Δ 9-THC may have its psychotomimetic effects produced by different mechanisms from those of LSD-25 and mescaline.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00414344

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15

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Reaktionen mit 1,4-Dinitrobutan (1968)

Rembarz, G. ; Ernst, B.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 59-63

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: 1,4-Dinitrobutan läßt sich mit Formaldehyd zum 2,5-Bis-(hydroxymethyl)-2,5-dinitro-hexan-1,6-diol (I) umsetzen. Durch katalytische Hydrierung konnte daraus das 2,5-Bis-(hydroxymethyl)-2,5-diamino-hexan-1,6-diol (II) gewonnen werden. Mit Formaldehyd und primären Aminen liefert I 1,2-Bis-[5′(5′-nitro-1′,3′-dialkyl-hexahydro-pyrimidyl)]-äthane (III) und 1,2-Bis-[5′(5′-nitro-3′-alkyl-tetrahydro-1′,3′-oxazinyl)]-äthane (IV).

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370109

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16

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Über den Zusammenhang zwischen Konstitution und insektizider Wirkung einiger Acetylphenylester der Phospor- und Thiophosphorsäure (1968)

Wolf, F. ; Meissner, D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 243-251

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wurden verschiedenartig substituierte Acetylphenylester der Phosphor- und Thiophosphorsäure hergestellt und deren Wirksamkeit gegen Musca domestica geprüft. Es zeigte sich, daß eine lineare Abhängigkeit sowohl zwischen dem LD50-Wert und dem pK-Wert als auch zwischen dem LD50-Wert und der Verschiebung der Frequenz der OH-Valenzschwingung der zur Veresterung herangezogenen Phenole besteht, wenn diese in m- oder p-Stellung substituiert sind. Bei mehrfacher Substitution konnte diese Übereinstimmung nicht gefunden werden, da durch Wasserstoffbrückenbindung (o-Acetylphenol) oder sterische Hinderung, speziell bei angularen Erstsubstituenten (NO2- und COCH3Gruppe), die erwarteten Substitutionseinflüsse nicht voll wirksam werden.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370504

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Einige Cumolderivate als Modellsubstanzen für para-substituierte Polystyrole (1968)

Drefahl, G. ; Hörhold, H.-H. ; Hofmann, K. D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 97-101

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird über Darstellung und Eigenschaften von p-Nitrosocumol. p-Cumylborsäure, p-Cumylquecksilberacetat und einigen hiervon abgeleiteten Verbindungen berichtet, die als Modelle für substituierte Polystyrole dienen könen.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370114

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Untersuchungen über das Dampf-Flüssigkeits-Phasengleichgewicht des Systems Methylenchlorid/Chloroform/Tetrachlorkohlenstoff bei 45°C unter Verwendung einer gaschromatographischen Analysenmethode (1968)

Rulewicz, G. ; Schuberth, H. ; Leibnitz, E.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 122-136

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es werden die Ergebnisse von Phasengleichgewichtsmessungen am genannten System bei einer Schnittemperatur von 45,0 °C mitgeteilt. Des weiteren wird versucht, die Konzentrationsabhängigkeit des Phasengleichgewichtes durch einen ternären MARGULES-Ansatz zu interpretieren und die von SCHUBERTH in (2) dargelegte Behauptung der besseren Darstellbarkeit mit B′=B′13 + B′23 gegenüber B′ = 0 zu überprüfen. Die hinreichend konsistenten Meßergebnisse scheinen eine Bestätigung der aufgestellten Behauptung zu erbringen.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370303

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Zur Kenntnis der 2-Amino-1,3,4-oxdiazole. XX. Über die Bildung von in 5-Stellung heterocyclisch substituierten 1-Acyl-diaminoguanidinen (1968)

Gehlen, H. ; Neumann, R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 182-191

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Heterocyclische Hydrazine reagieren mit 2-Amino-1,3,4-oxdiazolen in Gegenwart von HCl unter Bildung von 1-Acyl-diaminoguanidinen, die in 5-Stellung heterocyclisch substituiert sind und bei der Oxydation 1-Acyl-C-amino-formazane liefern.In siedender Alkalilauge cyclisieren die Diaminoguanidine zu den Azobasen der in Nβ-Stellung heterocyclisch substituierten 5-Hydrazino-1,2,4-triazole.

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370310

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Masthead (1968)

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968)

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370501

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Über ReaktioneN mit Aluminiumalkylen. XI. Zur Reaktion von Triäthylaluminium, Äthylaluminium-sesquichlorid und Diäthylaluminiumhydrid mit Chlormethanen (1968)

Reinheckel, H. ; Gensike, R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 214-224

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird über das Verhalten von Äthylaluminiumsesquichlorid, Triäthylaluminium und Diäthylaluminiumhydrid gegenüber Methylenchlorid, Chloroform und Tetrachlorkohlenstoff unter verschiedenen Reaktionsbedingungen berichtet.Methylenchlorid und Chloroform werden durch Äthylaluminiumsesquichlorid nicht angegriffen, durch Triäthylaluminium langsam enthalogeniert. Dagegen reagiert Tetrachlorkohlenstoff sehr heftig mit den ersten beiden Äthylaluminium-Verbindungen und führt zu Explosionen. Methylenchlorid eignet sich sehr gut als Lösungsmittel für aluminiumorganische Synthesen, wie bei der Darstellung von Ketonen aus Säurechloriden mit Hilfe von Äthylaluminiumsesquichlorid gezeigt wird.

Additional Material: 6 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370314

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Luftoxydation von Aminalen (1968)

Schmitz, E. ; Habisch, D. ; Ohme, R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 252-256

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Entgegen einer älteren Literaturangabe, wonach Einwirkung von Luftsauerstoff auf Isobutyraldehyd-diphenylaminal zu Hydrazobenzol führen soll, wurde festgestellt, daß unter C—C-Spaltung Diphenyl-formamidin entsteht. Die Reaktion läßt sich auf Aminale des p-Toluidins und des p-Chlor-anilins übertragen.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370505

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Iron(III) 8-hydroxy quinoline 7-sulfonic Acid Chelate (1968)

Balachandran, K. ; Banerji, Samir K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 263-268

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Iron(III) forms in the aqueous medium a green complex with 8-hydroxy quinoline 7-sulfonic acid with maximum absorbence at 610 mμ, stable in the pH range 3-4. The composition of the complex as established by three different methods spectrophotometrically is Fe(III) EHQS (where EHQS is the abreviation used for 8-hydroxy quinoline 7-sulfonic acid). The stability constant calculated by the methods of BANERJI and DEY (1) and themole-ratio method (2) was found to be log K = 3.8 ± 0.05 at 25°C and the heat of formation was found to be = -5.24 k. cal/mole at 25°C.

Additional Material: 6 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370507

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Preparation of high purity 1,4-Dioxane, Tetrahydrofuran and Dimethoxyethane as solvents for organometallic compounds (1968)

Brandes, K. K. ; Gerdes, R. J.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 1-5

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Description / Table of Contents: 1,4-Dioxan, Tetrahydrofuran and Dimethoxyäthan wurden unter Hochvakuum-Bedingungen über Kalium getrocknet und anschließend entgast. Die UV-Spektren und die elektrischen Leitfähigkeiten der hochgereinigten Äther wurden gemessen. Die Lösungsmittel konnten unter Hochvakuum-Bedingungen für einen beliebig langen Zeitraum ohne Veränderungen dieser physiko-chemischen Eigenschaften aufbewahrt werden. Behandlung mit Kalium unter Hochvakuum-Bedingungen führte zu einer teilweisen Spaltung der hochgereinigten Äther und hatte eine erhöhte elektrische Leitfähigkeit und Lichtabsorption zur Folge.

Notes: 1,4-Dioxan, Tetrahydrofuran and Dimethoxyethan were dried over potassium and subsequently degassed, under high vacuum conditions. The u. v. spectra and the electric conductivities of the high purity ethers were measured. The solvents could be stored under high vacuum conditions for an unlimited period of time, without any changes of their physico-chemical properties. Treatment with potassium under high vacuum conditions caused a partial cleavage of the high purity ethers resulting in increased electric conductance and absorption of light.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370102

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Über Synthesen in der Theophyllinreihe. XIII. Synthese von Theophyllin- und Coffein-mercapto-essig- und -propionsäuren (1968)

Klosa, J.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 64-71

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird die Synthese neuer Theophyllin- und Coffein-mercapto-essig- und -propionsäuren sowie einiger Ester derselben beschrieben.

Additional Material: 2 Tab.

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Polymerisationsfähige und polymere Verbindungen. VIII. Über Darstellung und Reaktionen von p-Nitrosopolystyrol (1968)

Drefahl, G. ; Hörhold, H.-H. ; Hofmann, K. D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 91-96

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Über die Bildung von p-Nitrosopolystyrol bei der Reaktion von Polystyrolquecksilberacetat mit Nitrosylchlorid wird berichtet, und es werden einige Umsetzungen an p-Nitrosopolystyrol beschrieben.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370113

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Beiträge zur analytischen Chemie der Plaste. XLII. Über einige Besonderheiten der Oxiranringöffnung (1968)

Jahn, H. ; Raubach, H. ; Rodekirch, G. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 113-121

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Durch kinetische Untersuchungen der Oxiranringöffnung mit Hilfe von Modellsubstanzen wird gefunden, daß die sterische Behinderung der Epoxidgruppe am Bicycloheptanring von Dicyclopentadien-dioxid bei der Reaktion mit Halogenwasserstoff in Dioxan nicht auf die Endomethylengruppe, sondern auf das während der Reaktion primär gebildete Halogenhydrin am Cyclopentanring zurückzuführen ist.Der starke Unterschied in der Reaktivität von HCl und HBr bei der Oxiranringöffnung von Dicyclopentadiendioxid in wasserfreiem bzw. wasserhaltigem Dioxan findet seine Erklärung in unterschiedlicher Protonenkonzentration des Reaktionsmediums. H0-Messungen mit verschiedenen Indikatoren liefern für HBr-Dioxan-Lösungen stets niedrigere H0-Werte als für entsprechende HCl-Dioxan-Lösungen.

Additional Material: 12 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370302

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Masthead (1968)

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968)

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370101

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Über die Protonierung iso-π-elektronischer Thiotropone (1968)

Bohnensack, R. ; Fabian, J. ; Mayer, R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 41-46

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird die Protonierung der mit Thiotroponen iso-π-elektronischen Trithione (I), Isotrithione (II) und α-Dithiopyrone (III) sowie die Protonierung des Dithiobenzoesäure-methylesters (IV) und der cyclischen Trithiocarbonate (V) in wäßriger Schwefelsäure untersucht. Die H0-Werte der Halbprotonierung werden spektrophotometrisch abgeleitet und die Basizitäten mit den HMO-Elektronendichten verglichen.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370107

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Synthese und Eigenschaften von Naphthalin-1,8-dialdehyd (1968)

Hauptmann, S. ; Hunger, P. ; Blaskovits, A.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 72-77

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Die Umsetzungen von 1,8-Bis-brommethyl-naphthalin mit Dimethylsulfoxid, Na2S, NH3 und N-Bromsuccinimid werden beschrieben. Aus 1,8-Bis-dibrommethyl-naphthalin wurde über 1,3-Dimethoxy-1 H, 3H-naptho[1,8-cd]pyran und 1,3-Dihydroxy-1H,3H-naphtho[1,8-cd]pyran Naphthalin-1,8-dialdehyd dargestellt.

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URL: http://dx.doi.org/10.1002/prac.19680370111

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Masthead (1968)

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968)

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370301

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Polymerisationsfähige und polymere Verbindungen. IX. Ein Makromolekulares Polyradikal vom Diphenylstickstoffoxid-Typ (1968)

Drefahl, G. ; Hörhold, H.-H. ; Hofmann, K. D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 137-142

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird über die Darstellung eines makromolekularen Polyradikals vom Diphenylstickstoffoxid-Typ berichtet. Die Struktur wird durch UV- und ESR-Spektren belegt.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370304

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Einige Reaktionen mit Salzen von Diselenoxanthogen- und Diselenokarbaminsäuren (1968)

Rosenbaum, A.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 200-205

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird über die Darstellung und Eigenschaften von Diselenoxanthogen-, Diselenokarbaminsäureestern, einigen Selenoharnstoffen und über die Reaktion von Diselenoxanthogenat mit Phosphoroxychlorid berichtet. Auf Versuche zur Darstellung von Bis(N,N-dialkylselenokarbamyl) diseleniden wird hingewiesen.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370312

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Synthesis of the Geometric Isomers of the 1,2,4-trimethylcyclohexanes (1968)

Mahmoud, Bahram H.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 225-233

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The four geometric isomers of the 1,2,4-trimethylcyclohexanes, ctt, ctc, cct and ccc have been synthesized, characterized and their physical constants determined.In the course of the work the stereospecifity of a catalytic reduction method of some olefins and the WOLFF-KISHNER reduction of some ketones were demonstrated.

Additional Material: 4 Ill.

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URL: http://dx.doi.org/10.1002/prac.19680370502

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Bestimmung von Zink in Pflanzen (1968)

Trier, Karin ; Neubert, P. ; Ebeling, R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 234-242

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Für die Bestimmung von Zink in Pflanzensubstanzen eignen sich absorptionsflammen-photometrische und polarographische Methoden.Mit den zur Verfügung stehenden Gerätekombinationen konnten Messungen im Bereich von 1-5 μg Zn/ml bzw. 1-25 μg Zn/ml Meßlösung vorgenommen werden. Die Streubereiche betragen ±3,17 ppm bzw. ±3,25 ppm. Für die polarographische Bestimmung müssen störendes Phosphat und Sulfat durch Passage einer Kationenaustauschersäule abgetrennt werden. Die absorptionsflammenphotometrische Bestimmung wird durch die in Pflanzenproben vorliegenden Anionen und Kationen nicht gestört, sofern die Messung in 0,1 n HCl erfolgt. Für serienmäßige Arbeiten eignet sich das letztgenannte Verfahren besser, da mit dem polarographischen Verfahren bei gleicher Aufschlußprozedur nur die Hälfte an Bestimmungen geschafft wird. Dagegen ergibt sich bei diesem die Möglichkeit, in geringen Meßlösungsmengen von 0,5 ml zu messen. Die atomabsorptionsphotometrische Methode benötigt mindestens 3 ml Meßlösung.

Additional Material: 5 Tab.

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URL: http://dx.doi.org/10.1002/prac.19680370503

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Synthese und Nachweis von Monoalkylhydrazinen (1968)

Ohme, R. ; Schmitz, E. ; Sterk, L.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 257-262

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Monoalkylhydrazine werden erhalten, indem man in wäßriger Lösung Cyclohexanon nd ein Alkylamin mit Hydroxylamin-O-sulfonsäure zu einem 1-alkyl-3,3-pentamethylendiaziridin umsetzt und dieses nach Extraktion mit Toluol ohne Isolierung zu Monoalkylhydrazin und Cyclohexanon hydrolysiert. Durch Umsetzung von Monoalkylhydrazinen mit Kaliumcyanat zu 2-Alkyl-semicarbaziden und deren Fällung mit p-Nitrobenzaldehyd lassen sich gut kristallisierende Derivate herstellen. Durch Aminierung mit Hydroxylamin O—N-disulfonsäure werden Monoalkylhydrazine zu Stickstoff und zum entsprechenden Alkan abgebaut; letzteres wird gaschromatographisch identifiziert.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370506

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Zur Kenntnis der 2-Amino-1,3,4-oxidiazole. XXI. Über die Umsetzung von Aldonsäurehydraziden mit Bromcyan (1968)

Gehlen, H. ; Zeiger, G.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 269-277

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Bei der Umsetzung von Aldonsäurehydraziden mit Bromcyan entstehen 2-Amino-5-polyhydroxyalkyl-1,3,4-oxidiazole, die sich mit Wasser in die entsprechenden Semicarbazide, mit Laugen in die entsprechenden 1,2,4-Triazolone-(5) umwandeln lassen. Die Polyhydroxy-1,3,4-oxidiazole lassen sich total acetylieren.

Additional Material: 4 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370508

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Ergänzung zur Mitteilung „Substitution am Azulen. I“ (1968)

Franke, H. ; Mühlstädt, M.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 301-301

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680370513

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Substitutionsreaktionen mit 5′-O-Arylsulfonyl-thymidinen (1968)

Kowollik, G. ; Langen, P.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 311-318

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es werden Versuche zur Darstellung 5′-substituierter Thymidine aus 5′-O-Arylsulfonylthymidinen beschrieben. Während die Knüpfung neuer C—O- oder von C—S-Bindungen nach Austritt der Arylsulfonyloxy-Gruppe am C-5′ prinzipiell möglich ist, wird bei Versuchen zur Knüpfung einer C—C-Bindung am C-5′ mit Kaliumcyanid O2,5′-Cyclo-thymidin erhalten. Mit Ammoniak reagieren die 5′-O-Arylsulfonyl-thymidine über O2,5′-Cyclothymidin zu 1-(2′-Desoxyribofuranosyl)-5-methyl-isocytosin und 5-Methylisocytosin.

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URL: http://dx.doi.org/10.1002/prac.19680370515

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Ein neues antifungales Hexaenantibiotikum. Hexamycin. I. Produktion, Isolierung und Reinigung des Hexamycins (1968)

Eisenbrandt, K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 9-19

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Der Hexamycinbildner 4/122 gehört zur Gattung Streptomyces. Für die Fermentation erwies sich ein Nährmedium mit Sojabohnenmehl am geeignetsten. Das Hexaenantibiotikum wurde aus dem Myzel mit Methanol und aus dem Kulturfiltrat mit n-Butanol extrahiert. Nach Abtrennen eines „ätherlöslichen Antibiotikums“ wurde das Rohprodukt mit Wasser extrahiert und durch Craig-Verteilung im System n-Propanol-Äther-Wasser (1:3:3) gereinigt. Lyophilisation aus tert.-Amylalkohol führte zu einer gelben, amorphen. Substanz.

Additional Material: 7 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380102

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Peptide. VI. Synthese eines Pentapeptids mit modifizierter potentieller Circulin B-Sequenz (1968)

Arold, H. ; Barth, O.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 50-56

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird die Synthese des vollständig geschützten Pentapeptids BOC-Orn(Z)-D-Leu-Ile-Orn(Z)-Orn(Z)-OMe beschrieben. Der Aufbau gelingt vorteilhaft durch stufenweise Synthese vom Carboxylende her unter Benutzung der Carbodiimid-, gemischten Anhydrid und Nitrophenylester-Methode.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380106

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Synthese von Dipeptiden einiger β-Aminosäuren über α-Diazoketone (1968)

Jugelt, W. ; Falck, P.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 88-100

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Die WOLFF-Umlagerung der 1-Phthaloylamino-3-diazo-alkanone-(2) I a-d in Gegenwart von Anilin, DL-α-Phenyläthylamin, DL-β-Amino-β-phenyl-propionsäureäthylester and DL-Phenylalaninestern unter katalytischer Wirkung von Silberoxid oder durch Photolyse führt zu Derivaten des β-Alanins, der β-Amino-α-methyl-propionsäure, der β-Amino-α-äthyl-propionsäure und der β-Amino-β-phenyl-propionsäure. Die Verseifung der Estergruppierung der auf diesem Wege zugänglichen β-Phthaloylamino-propionyl-aminosäureester und anschließende Hydrazinolyse gibt die entweder aus zwei β-Aminosäuren oder einer β- und einer α-Aminosäure aufgebauten Dipeptide.

Additional Material: 8 Tab.

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URL: http://dx.doi.org/10.1002/prac.19680380110

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Infrared Studies of Mixed Ligand Complexes of mercuric cyanide (1968)

Agrawal, A. K. ; Tripathi, B. N.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 119-124

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The structure of (i) NaHg(CN)2(Cl)(H2O), (ii) NaHg(CN)2(Br)(H2O), (iii) NaHg(CN)2(CNS)(H2O), (iv) KHg(CN)2(Br) and (v) KHg(CN)2(CNS) has been studied by infrared spectroscopy. The structure of the anions of I, III and V complexes have been derived on the basis of characteristic absorption frequencies and other known properties and of II and IV on the basis of analogy as the CN groups in these complexes are infrared inactive. CN in these anions are linked as cyanide groups and SCN as isothiocyanate group in V. In III SCN is present both as thiocyanate and isothiocyanate group. III is monomeric with water as a coordinating group. In I and II water is not expected to be a ligand to Hg. Anions of I, II, IV and V are predominantly dimeric with CN as bridging group in the first three and SCN in V.

Additional Material: 1 Ill.

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URL: http://dx.doi.org/10.1002/prac.19680380302

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Über eine neue Synthese von Thiapyronen-(2) (1968)

Splinter, F. K. ; Arold, H.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 142-146

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird über eine einfache und verallgemeinerungsfähige Synthese von Derivaten des Thiapyrons-(2) berichtet. Die Darstellung gelingt durch Umsetzung der β-Mercaptoverbindungen α, β-ungesättigter Carbonsäureester mit monosubstituierten Malonylchloriden.

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IR-spektroskopische Untersuchung von N-Acyl-1,3-N,O-Heterocyclen und 2-Alkyl-thiazolinen-2 bzw.- -thiazinen-2 (1968)

Pastura, A. ; Thewalt, K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 177-181

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird gezeigt, daß für N-Acyl-oxazolidine, -1,3-tetrahydrooxazine, -1,3-hexahydrooxazepine, 2-Alkyl-Δ2-thiazoline und 2-Alkyl-Δ2-thiazine Absorptionen im Bereich zwischen 900 und 1000 cm-1 charakteristisch sind. Diese Verbindungen wurden außerdem gaschromatographisch untersucht.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380311

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Zum Verlauf der Oxydation von Olefinen in flüssiger Phase. I. Untersuchungen über den Verlauf der ozoninitiierten Oxydation von Dodecen-1 (1968)

Greiner, Anneliese

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 199-206

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird über Untersuchungen des Verlaufs der Oxydation bei geradkettigen Monoolefinen am Modell Dodecen-1 berichtet, insbesondere über den stimulierenden Einfluß eines Zusatzes von Ozon zum Oxydationsgas auf den Reaktionsablauf.

Additional Material: 9 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380314

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Mixed Ligand Derivatives of Th-EDTA Chelate with some monohydroxy - mono-carboxylic acids (1968)

Gupta, C. B. ; Agarwal, R. P.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 246-252

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Interaction of the 1:1 Th-EDTA diaquo chelate with lactic, mandelic, o-hydroxy naphthoic acids has been investigated by the potentiometric technique. Formation of the mixed ligand chelate derivatives was indicated above pH 5.5. Equilibrium constants of the reactions have been determined.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380318

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Methods for the Determination of Trace Impurities in nickel: Boron, chloride, sulfide and sulfate (1968)

Srivastava, Ram D. ; Gesser, Hyman

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 262-265

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: A method for the analysis of microgram quantities of chloride and sulfate in nickel and nickel nitrate is given. The reliability of the method has been shown by a quantitative recovery of added chloride and sulfate from a solution of nickel nitrate. The method is being applied for the determination of these impurities in electrodeposited nickel. Methods are also given for the determination of boron and sulfide, found as impurities, in the electrodeposited nickel.

Additional Material: 1 Tab.

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URL: http://dx.doi.org/10.1002/prac.19680380503

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An Spectroscopic Investigation of Complex Formation in nickel sulphate-aliphatic amine system (1968)

Shukla, Padmaja ; Narain, Gopal

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 289-294

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Visible absorption spectra of Nickel (II) sulphate and various aliphatic amines were analysed, in order to extract information regarding each of amine Nickel (II) complex. The presence of six different complexes i.e., mono, di, tri, tetra, penta and hexamines have been indicated by the shift of absorption maxima for these. The energy changes of complexes due to exchange of water ligands with amines have been calculated and an interpretation is offered for this shift in the observed position of absorption maxima.

Additional Material: 4 Tab.

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URL: http://dx.doi.org/10.1002/prac.19680380508

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Formation of complex compounds between uranyl nitrate and nitrate of the second group elements. The system: Hg2(NO3)2—UO2(NO3)2—H2O (conductivity, refractive index, spectrophotometry and pH) (1968)

Gupta, S. S. ; Sharga, B. N.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 301-304

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: A study of the physicochemical properties like refractive index, spectrophotometry, conductivity and pH measurements of a series of mixed solutions of uranyl nitrate and mercurous nitrate have shown the existence of two complexes in solution in the (1:1) and (1:2) molecular ratios respectively viz. \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm UO}_2 \left({{\rm NO}_3 } \right)_2 \cdot {\rm Hg}_2 \left({{\rm NO}_3 } \right)_2,} \hfill & {\left({\rm i} \right)} \hfill \\ {{\rm UO}_2 \left({{\rm NO}_3 } \right)_2 \cdot 2{\rm Hg}_2 \left({{\rm NO}_3 } \right)_2,} \hfill & {\left({{\rm ii}} \right)} \hfill \end{array} $$\end{document}Both the above mentioned compounds have been detected only in the solution by the breaks in the usual curves when various properties like conductivity, refractive index, spectrophotometry and pH were plotted against the m.l. of mercuric nitrate (M/10) added to a fixed volume of uranyl nitrate (M/10).

Additional Material: 3 Ill.

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URL: http://dx.doi.org/10.1002/prac.19680380510

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Amperometric Determination of Vanadium (V) as copper orthovanadate (1968)

Gupta, C. M. ; Joshi, M. P.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 358-361

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: A rapid amperometric method for the determination of vanadium (V) has been described which involves titration of vanadium (V) as sodium orthovanadate against copper sulphate solution at Ede = - 0.20 V (vs S.C.E.). The accuracy and reproducability of the method is excellent particularly at higher temperature i.e. at 60°C. The method permits the determination of vanadium (V) down to 0.2 mM with an accuracy 1.0%).

Additional Material: 1 Ill.

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URL: http://dx.doi.org/10.1002/prac.19680380517

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Preparation, Absorption Spectra and Electronic Configuration of some amino complexes of nickel (II) acetate (1968)

Narain, Gopal

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 366-368

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Three hexaco-ordinated complexes of nickel (II) acetate with ammonia, ethylenediamine and propylenediamine have been prepared. Conductivity measurements indicate the complexes to be non-electrolytes. Molecular weight measurements confirm this. The visible absorption spectrophotometric measurements show a number of bands corresponding to the various permitted transitions of the metal and a discussion of the structure in the light of these transitions is presented.

Additional Material: 1 Tab.

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URL: http://dx.doi.org/10.1002/prac.19680380519

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Inorganic Co-ordination Compounds of tetravalent cerium complexes of cerium (IV) sulphate with primary aliphatic amines (1968)

Narain, Gopal ; Shukla, Padmaja

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 375-377

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Some complexes of cerium (IV) sulphate with ammonia and primary aliphatic amines have been prepared. The molecular formulae on the basis of analysis turn out to be Ce(SO4)2 · 4 amine. The complexes behave as electrolytes. The absorption spectra have been recorded and an interpretation is offered for possible transitions.Lanthanides, and cerium in particular are receiving special attention these days. A number of complexes of latter with various ligands and anions have been reported1-5). In the present paper some complexes of cerium (IV) sulphate with ammonia, methyl, ethyl, propyl and butylamine are being presented.

Additional Material: 1 Tab.

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URL: http://dx.doi.org/10.1002/prac.19680380521

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Cyanoethylation of Sulphonamides (1968)

Shukla, J. S. ; Srivastava, R. K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 369-374

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Some substituted sulphonamides have been cyanoethylated and they were subjected to reduction. On hydrolysis with aqueous and alcoholic sodium hydroxide the cyanoethylated sulphonamides gave decyanoethylated products identical to the original sulphonamides.

Additional Material: 3 Tab.

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URL: http://dx.doi.org/10.1002/prac.19680380520

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Reactions of Cobalt (II) Oxalate with Primary Aliphatic Amines (1968)

Narain, Gopal

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 378-381

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Some molecular addition compounds of cobalt (II) oxalate with primary aliphatic amines have been prepared. The general molecular formula on the basis of analysis of constituent elements turn out to be CoC2O4 · RNH2. The formation of compounds is independent of the excess amine concentration. The compounds behave as electrolytes. The molecular weight measurements and VAN'T HOFF factor “i” also confirm this fact.

Additional Material: 1 Tab.

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Furano Compounds. XIIIForms part of the material for the Ph. D. thesis to be submitted by A. NAGANAGOUD to the Karnatak University, Dharwar. S. India. (1968)

Naganagoud, A. ; Rajagopal, S.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 386-390

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The synthesis of 3-methyl-6,7-benzo-5′(4′)-methyl furano-(2′,3′,1,2) xanthones has been recorded.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380524

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Magnetic Susceptibility, ultraviolet and visible Absorption Spectra of co-ordination complexes of iron (III) phthalimide with primary and secondary aliphatic amines (1968)

Narain, Gopal

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 382-385

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The co-ordination compounds of tripositive iron with nitrogen containing ligands have been found to be of high spin type on the basis of magnetism. The ultraviolet and visible absorption measurements show three bands in the vicinity of 21 400 cm-1, 17 480 cm-1 and 10 650 cm-1.

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380523

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Synthesen von 2-Alkyl-cycloalkandionen-(1,3) durch FRIEDEL-CRAFTS-Acylierungen (1968)

Schick, Hans ; Lehmann, Gerhard

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 391-396

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: 5- und 6-gliedrige 2-Alkyl-cycloalkandione-(1, 3) erhält man durch Umsetzung von Dicarbonsäurehalogeniden mit Carbonsäuren oder von Carbonsäurehalogeniden mit Dicarbonsäuren unter FRIEDEL-CRAFTS-Bedingungen.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380525

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Zur Darstellung der 2-Methylmercapto-4-methylphenylarsonsäure (1968)

Baumgärtel, E. ; Gruner, H.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 34-39

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird über Darstellung, Analyse und einige Eigenschaften der 2-Methylmercapto-4-methylphenylarsonsäure berichtet. Folgende Reaktionswege führten zum Ziel: (a) 4-Methylanilin → 2-Nitro-4-methylanilin → 2-Nitro-4-methylphenylarsonsäure → 2-Amino-4-methylphenylarsonsäure → 2-Methylmercapto-4-methylphenylarsonsäure; (b) 4-Methylanilin → 2-Amino-6-methylbenzthiazol → 2-Mercapto-4-methylanilin (alkalische Lösung) → 2-Methylmercapto-4-methylanilin → 2-Methylmercapto-4-methylphenylarsonsäure.

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URL: http://dx.doi.org/10.1002/prac.19680380104

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Darstellung einiger Adipinsäureester des Glycerins und des Trimethylolpropans (1968)

Schöllner, R. ; Löhnert, P.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 162-167

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Die Umsetzung der Acetonketale des Glycerins und des Trimethylolpropans mit Adipinsäureanhydrid liefert Adipinmono- und -diester. Durch nachfolgende Abspaltung der Acetonschutzgruppierungen gelangt man zu Mono-[2, 3-dihydroxypropyl]-adipat, Bis-[2, 3-dihydroxypropyl]-adipat, Mono-[2, 2-dihydroxymethyl-butyl]-adipat, Bis-[2, 2-dihydroxymethyl-butyl]-adipat.

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URL: http://dx.doi.org/10.1002/prac.19680380309

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Untersuchungen über ein antifungales Hexaenantibiotikum, Hexamycin. II. Eigenschaften des Hexamycins (1968)

Eisenbrandt, K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 20-33

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Das UV-Spektrum des Hexamycins besitzt Maxima bei 336, 356 und 376 nm. Im IR-Spektrum ist die typische Bande der Makrolid-Polyenantibiotika bei 1712 cm-1 enthalten. Der Schmelzpunkt beträgt 120-125°C, das Äquivalentgewicht 824, die Molmasse liegt zwischen 700 und 800. Hexamycin ist in polaren organischen Lösungsmitteln löslich und unlöslich in Wasser und nicht polaren Lösungsmitteln. Lösungen der Substanz verlieren ihre antibiotische Aktivität sowohl durch Erhitzen als auch bei längerem Stehen. Von 21 geprüften Mikroorganismen, vorwiegend Pilze, werden weit über die Hälfte durch 2-32 μg/ml gehemmt. Der Einfluß des Hexamycins auf die Polyphenoloxydase- und Peroxydaseaktivität ist gering. Die Atmung von Saccharomyces cerevisiae Hansen wird durch Hexamycin beträchtlich gemindert.

Additional Material: 7 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380103

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Konformationsanalyse von 1,2-Aminoalkoholen durch synparallele Cyclisierung mit Ketonen (1968)

Fischer, F. ; Schiene, R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 57-68

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Die Ergebnisse von Gleichgewichts- und kinetischen Messungen der syn-parallelen Cyclisierung diastereomerer 1,2-Aminoalkohole mit Ketonen werden diskutiert. Es wird gezeigt, daß in der Mehrzahl der untersuchten Fälle sterische Faktoren die Gleichgewichtslage und die Reaktionsgeschwindigkeit entscheidend beeinflussen.

Additional Material: 4 Tab.

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URL: http://dx.doi.org/10.1002/prac.19680380107

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Zur Reaktivität von Carbonyl- und Thiocarbonylgruppe im Monothio-dibenzoylmethan (1968)

Hauptmann, S. ; Uhlemann, E. ; Widmann, L.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 101-106

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Monothio-dibenzoylmethan ist wesentlich reaktionsfähiger als Dibenzoylmethan. Die üblichen Carbonylreagenzien greifen stets zuerst die Thiocarbonylgruppe an. Die Monokondensationsprodukte sind daher schwefelfrei. Wenn sich Bis-kondensationsprodukte bilden, wird zuerst H2S und dann H2O abgespalten. Die Umlagerung der Enol-Form des Monothio-dibenzoylmethans in die Enthiol-Form erfolgt wahrscheinlich direkt und nicht über die Oxo-thioxo-Form.

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Decolourization of Crystal Violet induced by ultrasonic waves (1968)

Prakash, Sheo ; Prakash, Om ; Prasad, Badri ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 130-136

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: High frequency ultrasonic waves of frequency 1 Mc/s. have been employed to study the decolourization of dilute aqueous solution of crystal violet. The process is irreversible and the kinetic study shows it to be unimolecular one. The deaeration of the solution by nitrogen does not affect the rate of the decolourization. The addition of certain substances such as alcohol, acetone, ether, glycerine, dioxan and allylthiourea inhibits the decolourization to a considerable extent. Oxidation and subsequent destruction of the dye molecule has been found to be the cause of the fading of the dye solution.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380304

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Präparative Methoden zur Darstellung ätherischer Titantetramethyllösungen (1968)

Thiele, K.-H. ; Müller, J.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 147-149

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Ätherische Titantetramethyllösungen lassen sich einfach durch Einwirkung von Titan(IV)-chlorid auf Methylmagnesiumhalogenidlösungen darstellen. Geeignete Apparaturen werden im folgenden beschrieben.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19680380307

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Stickstoffhaltige Steroide. XXI. Isomerisierungsreaktionen der epimeren 2,3-Benzoylimino-cholestane (1968)

Drefahl, G. ; Ponsold, K. ; Klemm, D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 168-176

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Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: 2α, 3α- und 2β, 3β- Benzoylimino-cholestan werden durch Natriumjodid in siedendem Aceton zu 2′-Phenyl-(2α, 3α)-oxazolino-[5′, 4′:2, 3]-cholestan bzw. 2′-Phenyl-(2β, 3β)-oxazolino-[5′, 4′:3, 2]-cholestan umgelagert. Mit Bortrifluoridätherat in absolutem Äther bildet 2α, 3α-Benzoylimino-cholestan ebenfalls 2′-Phenyl-(2α, 3α)-oxazolino-[5′, 4′:2, 3]-cholestan. Dagegen erfolgt durch verdünnte Schwefelsäure oder Pikrinsäure in Aceton sowie durch Benzoesäureanhydrid oder Pikrinsäure in Alkohol Ringöffnung zu 2-Hydroxybzw. Alkoxybenzamiden. Die Ringschlußreaktion des diaxialen 2β-Chlor-3α-benzaminocholestan führt mit Natriumhydrogenkarbonat zum Oxazolin, während mit Kaliumhydroxid 2α, 3α-Imino-cholestan entsteht.

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Zum Verlauf der Oxydation von Olefinen in flüssiger Phase. II. Zur Bildung von Epoxiden (1968)

Greiner, Anneliese

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 207-221

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ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Es wird über Untersuchungen zur Epoxidbildung bei der Oxydation geradkettiger Olefine berichtet. Diese kann durch Zusatz von Ozonid oder Carbonyl auf über 50% des umgesetzten Olefins erhöht werden.

Additional Material: 19 Ill.

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α-Aminosäuren und Derivate. II. Isonitrilreaktionen mit Glyoxylsäurederivaten (1968)

Gross, H. ; Gloede, J. ; Keitel, I. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 192-199

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Notes: Carboxyl- bzw. Aldehyd-geschützte Glyoxylsäurederivate wurden für Isonitril-Reaktionen nach UGI eingestzt: Glyoxylsäureamide gaben je nach Reaktionskomponenten Diamide der Aminomalonsäure oder Derivate des Tetrazolyglycins. - Acetale von Glyoxyloylaminosäureamiden (9a, b) wurden aus Dialkoxyessigsäure gewonnen. Das analog aus Dichloressigsäure zugängliche Dichloracetylderivat 9c gab mit Amin ein Aminal, das sich ebenso wie 9a sauer zum entsprechenden 2-Hydroxypiperazin-dion-(3,6) 11a hydrolysieren ließ. - Lävulinsäure konnte mit Amin/Isonitril zu Pyrrolidon-5-carbonsäureamiden cyclisiert Werden.

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Zur Synthese von aliphatischen Vinyl-Keto-Verbindungen (1968)

Mühlstädt, M. ; Ozegowski, W. ; Ulbricht, H.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 37 (1968), S. 302-310

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Keywords: Chemistry ; Organic Chemistry

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Notes: Die Aminomethylierun von aliphatischen α-Keto-dicarbonsäurediäthylestern und Dicarbonsäurediäthylestern mit mittelständiger Ketofunktion ergab Dimethylaminomethyl-keto-dicarbonsäurediäthylester, deren Hydrochloride thermolytisch in die entsprechenden Methylen-keto-dicarbonsäurediäthylester übergeführt wurden.

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The Nature of Sulphur Compound Types in Bakr crude oil (1968)

Ahmed, L. ; Abdou, I. K. ; Mahmoud, B. H.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 1-8

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Notes: A detailed analytical scheme for the determination of different sulphur compound types in Bakr crude oil distillate fractions up to 350°C was carried out. The quantitative distribution of elemental sulphur, hydrogen sulphide, mercaptans, aliphatic sulphides, aromatic sulphides, reducible and thiophenic sulphur compound types was studied.

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Über Sultame XIII. Sultame von Xylidinen, von 2-Aminoanthrachinon und von p-Aminosalicylsäure (1968)

Helferich, Burckhardt ; Zeid, Ibrahim

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 40-49

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Notes: Die Synthese von Sultamen des p-Xylidins, des 2-Amino-1,3-dimethylbenzols, des 2-Aminoanthrachinons, der p-Aminosalicylsäure und der m-Aminosalicylsäure und einiger ihrer Derivate wird beschrieben. Aus den Butadien-(1,3)-sultamen von zwei Xylidinen konnten die entsprechenden N-Dimethylphenyl-pyrrole hergestellt werden.

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Über die Darstellung von N,N′-Dialkylharnstoffen und Alkylisocyanaten aus Alkylhalogeniden und Alkalicyanaten (1968)

Gerhardt, W.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 77-87

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Notes: Die Reaktion von primären langkettigen Alkylhalogeniden mit Alkalicyanat in Dimethylformamid verläuft in Gegenwart stöchiometrischer Wassermengen schnell und vollständig zu den entsprechenden N,N′-Dialkylharnstoffen. Langkettige α,ω-Dihalogenalkane setzen sich analog zu den entsprechenden Polyharnstoffen um. Sekundäre Alkylhalogenide lassen sich mit schlechteren Ausbeuten in verzweigte N,N′-Dialkylharnstoffe überführen. Die als Zwischenprodukte zu erwartenden Alkylisocyanate konnten isoliert werden.

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Über heteroorganische Verbindungen. XXVIII. O,O-Dialkyl-S-(aryl-disulfido)-dithiophosphate (1968)

Almasi, L. ; Hantz, A.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 113-118

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Notes: Es wird eine neue Gruppe thiophosphororganischer Verbindungen O,O-Dialkyl-S-(aryldisulfido)-dithiophosphate und deren IR-Spektren berichtet.

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Neuere Methoden der Präparativen Organischen Chemie. Herausgeg. v. W. Foerst. Verlag Chemie, Weinheim/Bergstr., Band IV 1966. VIII, 304 S., 2 Abb., 44 Tab., geb. DM 38.-; Band V 1967. VIII, 280 S., zahlr. Abb. u. Tab., geb. DM 38.- (1968)

Musso, H.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 50-51

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URL: http://dx.doi.org/10.1002/ange.19680800123

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Der Arbeitnehmer als Erfinder. Seine Rechte und Pflichten. Von O. Röpke. W. Kohlhammer Verlag, Stuttgart-Berlin-Köln-Mainz 1966. 1. Aufl., 176 S., kart. DM 16,80 (1968)

Vossius, V.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 52-52

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URL: http://dx.doi.org/10.1002/ange.19680800126

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76

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PH3 - ein neuer Ligand in einem Übergangsmetall-Komplex (1968)

Fischer, E. O. ; Louis, E. ; Schneider, R. J. J.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 122-123

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URL: http://dx.doi.org/10.1002/ange.19680800314

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Darstellung von Wolframpentafluorid (1968)

Schröder, J. ; Grewe, F. J.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 118-119

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URL: http://dx.doi.org/10.1002/ange.19680800309

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Neue 4-Hydroxythieno-pyrimidine (1968)

Ried, W. ; Gieße, R.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 122-122

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URL: http://dx.doi.org/10.1002/ange.19680800313

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Chemie der organischen Peroxide (1968)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 125-127

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URL: http://dx.doi.org/10.1002/ange.19680800317

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Methods of Elemento-Organic Chemistry. Herausgeg. von A. N. Nesmeyanov und K. A. Kocheshkov. Vol. 1: The Organic Compounds of Boron, Aluminum, Gallium, Indium and Thallium. Von A. N. Nesmeyanov und R. A. Sokolik. North Holland Publishing Company, Amsterdam 1967. 1. Aufl., XIII, 628 S., 40 Abb., 27 Tab., geb. hfl. 87.- (1968)

Köster, R.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 130-130

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Histoire Brève de la Chimie. Von L. Velluz. Librairie Maloine, Paris 1966. 1. Aufl., 115 S., brosch. F 14 (1968)

Rigaudy, J.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 132-132

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URL: http://dx.doi.org/10.1002/ange.19680800324

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82

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Der Mechanismus der Wolff-Kishner-Reaktionen: Reduktion, Eliminierung und Isomerisierung (1968)

Szmant, H. H.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 141-149

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Notes: Kinetik, Thermodynamik und Lösungsmitteleffekte werden zur Diskussion des Mechanismus der Wolff-Kishner-Reaktion herangezogen. Man nimmt an, daß unter normalen Bedingungen zuerst das trans-Hydrazonanion gebildet wird, welches im geschwindigkeitsbestimmenden Schritt an seinem Kohlenstoffende ein Proton einfängt. Mehr oder weniger gleichzeitig verliert das trans-Hydrazonanion am Stickstoffende, induziert durch das Lösungsmittel, ein Proton. Die Stereochemie der Wolff-Kishner-Reduktion wird wahrscheinlich von „ortho“-Substituenten beeinflußt und ändert sich auch beim Übergang zu einem protonenfreien, nichtpolaren Reaktionsmedium. Der für die Wolff-Kishner-Reduktion abgeleitete Mechanismus wird auch auf die Wolff-Kishner-Eliminierung und -Isomerisierung übertragen. Die Konformationsanalyse der Zwischenstufen erlaubt es, das Ausmaß der konkurrierenden Reduktionen und Eliminierungen aus den Strukturen acyclischer Systeme zu erklären.

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83

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Verbindungen mit Si — Ti-Bindungen (1968)

Hengge, E. ; Zimmermann, H.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 153-153

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URL: http://dx.doi.org/10.1002/ange.19680800409

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84

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Zur Struktur von β-RuCl3, RuJ3, IrBr3 und IrJ3 (1968)

Brodersen, K.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 155-155

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Die wissenschaftlichen Grundlagen des Pflanzenschutzes. Von H. Martin. Nach der 5. Auflage (1964) von: The Scientific Principles of Crop Protection übersetzt und ergänzt vor K. J. Schmidt. Verlag Chemie, GmbH., Weinheim/Bergstr. 1967. 1. Aufl., XII, 696 S. u. 3 Tab., GL. DM 68.- (1968)

Maier-Bode, H.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 160-160

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Encyclopedia of Polymer Science and Technology. Plastics, Resins, Rubbers, Fibers. Herausgeg. von H. F. Mark, N. G. Gaylord und N. M. Bikales. Band 3: Casting - Cohesive Energy. Interscience Publishers, a Division of John Wiley & Sons, New York-London-Sydney 1965. 1. Aufl., XIII, 862 S., zahlr. Abb. u. Tab., Einzelpr. 375s; Subskr.-Preis 300s (1968)

Fuchs, O.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 161-162

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URL: http://dx.doi.org/10.1002/ange.19680800423

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Neuere Methoden der präparativen organischen Chemie VIDie Beiträge dieser Reihe sind gesammelt in fünf Bänden im Verlag Chemie, Weinheim/Bergstraße, erschienen. Sie liegen auch in englischer Ausgabe vor. - Dieser Beitrag wird - erweitert um präparative Vorschriften - in Band VI der Reihe erscheinen. Umsetzungen mit N-Carbonyl-sulfamidsäurechlorid (1968)

Graf, R.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 179-189

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Notes: N-Carbonyl-sulfamidsäurechlorid (NCSA) ist ein aus Chlorcyan und Schwefeltrioxid erhältliches Zwischenprodukt, das mit zahlreichen Verbindungen viel leichter als andere Isocyanate unter elektrophiler Substitution reagiert. Mit Hydroxy-, Amino- oder Carboxylgruppen enthaltenden Verbindungen entstehen so N-Chlorsulfonylurethane, -harnstoffe bzw. -carbonsäureamide. Dazu gehört auch der Grundkörper Sulfamidsäurechlorid (Amidosulfonylchlorid). Durch Reaktion von N-Carbonyl-sulfamidsäurechlorid mit Olefinen werden außer Derivaten der β-Aminosäuren und der ungesättigten Carbonsäuren zahlreiche β-Lactame leicht zugänglich. Mehrere Typen sehr reaktionsfähiger neuer Sulfonylisocyanate können durch Folgereaktionen aus primären Umsetzungsprodukten des N-Carbonyl-sulfamidsäurechlorids sowie durch seine Reaktion mit Olefinen in Gegenwart radikalbildender Mittel erhalten werden. Mit einer Reihe von Verbindungen reagiert NCSA unter Abspaltung von Kohlendioxid zu Produkten mit der Gruppierung = N—SO2Cl.

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88

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Trimethylsilyl-Derivate des Germaniums und Zinns. - Elektronenbalance-Bindungen des Siliciums (1968)

Bürger, H. ; Goetze, U.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 192-193

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89

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Synthesen mit 1-Alkyliden- und 1-Aralkyliden-3-pyrazolidon-N,N-betainen, einem neuen Typ stabiler Azomethinimine (1968)

Dorn, H. ; Otto, A.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 196-196

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90

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Katalytische Eliminierungs- und Isomerisierungsreaktionen von O-Heterocyclen (1968)

Descotes, G.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 200-200

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URL: http://dx.doi.org/10.1002/ange.19680800518

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91

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Luciferine, bioluminescierende Substanzen (1968)

Goto, T. ; Kishi, Y.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 417-424

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Notes: Die Bioluminescenz des amerikanischen Leuchtkäfers Photinus beruht auf der Reaktion von 2-(6-Hydroxybenzthiazol-2-yl)-Δ2-1,3-thiazolin-4-carbonsäure („Photinus-Luciferin“) mit dem Enzym Luciferase in Gegenwart von ATP und Magnesium-Ionen. Im Muschelkrebs Cypridina wird die Bioluminescenz dagegen durch die Reaktion einer Luciferase mit 8-(3-Guanidino-propyl)-6-indol-3-yl-2-(1-methyl-propyl)-3,7-dihydroimidazo[1,2-a]-pyrazin-3-on („Cypridina-Luciferin“) hervorgerufen. Latia-Luciferin ist 1,3,3-Trimethyl-2-(4-formyloxy-3-methyl-3-butenyl)-1-cyclohexen. Das Luciferin der Federkoralle Renilla ist ein noch nicht genau identifiziertes Tryptaminderivat; die Luciferine anderer leuchtender Organismen sind noch unbekannt. - Vorstellungen über den Ablauf der Luciferin-Luciferase-Reaktion und zahlreiche Spektren runden diese Übersicht ab.

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Ein neuer Weg zu 1,1-disubstituierten CyclopropanenHerrn Professor F. Kröhnke zum 65. Geburtstag gewidmet. (1968)

Gosselck, J. ; Schmidt, G.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 439-440

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Eine vielseitige Methode zur Darstellung C-deuterierter VerbindungenHerrn Professor Fritz Kröhnke zum 65. Geburtstag gewidmet. (1968)

Kühlein, K. ; Neumann, W. P. ; Mohring, H.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 438-439

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94

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Rußbildung in vorgemischten Kohlenwasserstoff-Flammen (1968)

Homann, K. H.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 425-438

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Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Die für die Rußbildung kritischen Brennstoff-Sauerstoff-Verhältnisse von verschiedenen Kohlenwasserstoffen sowie deren Abhängigkeit von Druck und Temperatur werden diskutiert. Am Beispiel der Rußbildung in Bunsenflammen wird gezeigt, daß außerdem der Form und der Struktur der Flammenfront ein entscheidender Einfluß zukommt. In der Reaktionszone von „fetten“ Kohlenwasserstoff-Flammen entstehen ungesättigte Verbindungen, deren Konzentrationsprofile quantitative Rückschlüsse auf ihre Bedeutung bei der Rußbildung gestatten. Der „Mechanismus“ der Rußbildung wird auf der Grundlage der Konzentrationen höherer Kohlenwasserstoffe und des Verlaufs von Rußteilchenzahl und -größe besprochen. Auch die Wirkung von elektrischen Feldern auf die Rußbildung wird untersucht.

Additional Material: 17 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19680801103

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Synthese eines Puromycin-AnalogonsHerrn Professor F. Kröhnke zum 65. Geburtstag gewidmet. (1968)

Lichtenthaler, F. W. ; Albrecht, H. P.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 440-441

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19680801106

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Synthese von Derivaten der 4-Amino-4-desoxy-D-galaktose (1968)

Lichtenthaler, F. W. ; Heidel, P.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 441-442

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19680801107

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97

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Neue Vorstufen für Arylcarbene (1968)

Nair, R. M. G. ; Meyer, E. ; Griffin, G. W.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 442-443

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19680801108

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Äthinyloge Säureamide und UrethaneM. N. dankt der schweizerischen Stiftung für Stipendien auf dem Gebiete der Chemie für ein Stipendium. Frl. M. Ruppert gilt unser Dank für geschickte experimentelle Mitarbeit. (1968)

Hafner, K. ; Neuenschwander, M.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 443-444

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19680801109

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Eine neuartige Umlagerung substituierter 3-AminopropenaleM. N. dankt der schweizerischen Stiftung für Stipendien auf dem Gebiete der Chemie für ein Stipendium. Frl. M. Ruppert gilt unser Dank für geschickte experimentelle Mitarbeit. (1968)

Neuenschwander, M. ; Hafner, K.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 444-444

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19680801110

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Struktur des Dimethylnitrosamin-kupfer(II)-chlorids (1968)

Klement, U. ; Schmidpeter, A.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 80 (1968), S. 444-445

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19680801111

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