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  • 1
    Electronic Resource
    Electronic Resource
    Stoffwechselprodukte von Mikroorganismen. 231. Mitteilung230. Mitteilung s. [1].. Bafilomycin-A1-21-O-(α-L-rhamnopyranosid): Strukturaufklärung durch chemische Verknüpfung mit Bafilomycin A1 und Leucanicidin (1985)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 68 (1985), S. 83-94 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Isolation of Bafilomycin-A1-21-O-(α-L-rhamnopyranoside). Structural Determination by Chemical Correlation with Bafilomycin A1 and LeucanicidinFrom cultures of an actinomycete strain, the known antifungal and insecticidal antibiotic leucanicidin (1) and a hitherto unknown antifungal antibiotic, bafilomycin-A1-21-O-(α-L-rhamnopyranoside) (2), were isolated. The latter is spectroscopically closely related to 1 and bafilomycin A1 (3) and gave degradation products identical with compounds obtained by analogous degradation of 1 and 3.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19850680111
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  • 2
    Electronic Resource
    Electronic Resource
    Etudes sur les composés organométalliques. Partie XXIPartie XX: [1].. Contribution à l'étude de la décomposition du tétracyclohexyltitane (1985)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 68 (1985), S. 1698-1703 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Studies on Organometallic Compounds. Contribution to the Study of Thermal Decomposition of TetracyclohexyltitaniumThermal decomposition of tetracyclohexyltitanium proceeds in a different manner for the solid compound and for etheral solution. We propose an explanation of the decomposition mechanisms based on radical reactivities and compare our results with previous literature data.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19850680625
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis and Copper(I) Complexes of a Series of 9- to 13-Membered N3 Macrocycles (1987)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 70 (1987), S. 680-689 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Eight cyclic triamines with ring sizes between 9 and 13 were synthesized by the p-toluenesulfonate method. The open-chain triamines bis(2-aminoethyl)amine (dien) and bis(3-aminopropyl)amine (diprop) were used as starting materials. In some cases, the corresponding dimeric cyclic hexaamines have been isolated and characterized as major by-products. The complexation of Cu(I) by the triamines has been studied potentiometrically in CH3CN/H2O. All ligands L form ternary complexes [Cu(CH3CN)L]+. The corresponding association constants vary between 1011 and 107, decreasing with increasing ring size. In addition, complexes [Cu(CH3CN)yLH]2+, y = 1 or 2, are found as less important species with maximum concentrations of 7 to 50%.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19870700318
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  • 4
    Electronic Resource
    Electronic Resource
    Stoffwechselprodukte von Mikroorganismen. 236. Mitteilung235. Mitteilung: [1]. Schwefelhaltige Ansa-Verbindungen des Naphthomycin-Typus (1986)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 69 (1986), S. 1356-1364 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Metabolites of Microorganisms. Sulfur-Containing Ansa Compounds of the Naphthomycin TypeFrom a strain of Streptomyces (Tü 2357) in addition to naphthomycin A, 4 new yellow pigments were isolated and their structures determined by spectroscopic comparison with naphthomycin A. Whereas the naphthomycins D and E are simple derivatives of naphthomycin A, having OH and H, respectively, instead of Cl, the naphthomycins F and G contain an N-acetylcysteine residue linked to the aromatic moiety by a thioether group. Degradations with O3 yielded identical products from the naphthomycins A, D, F, and G, showing coincident configurations in parts of the molecules. Naphthomycin F shows some biological activity against gram-positive bacteria and fungi, although much weaker than naphthomycin A. The naphthomycins D, E, and G are inactive against microorganisms.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19860690610
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  • 5
    Electronic Resource
    Electronic Resource
    Revised Structure of the Fungal Germination Self-Inhibitor Gloeosporone (1987)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 70 (1987), S. 281-291 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Gloeosporone, the germination self-inhibitor from the fungus Colletotrichum gloeosporioides f.sp. jussiaea, is shown by spectroscopic data and X-ray analysis to have the constitution and relative configuration as shown in Formula 2 (either (1S,6R,12R)-1-hydroxy-6-pentyl-5,15-dioxabicyclo[10.2.1]pentadecan-4,13-dione or its enantiomer), rather than the previously assigned constitution 1.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19870700203
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  • 6
    Electronic Resource
    Electronic Resource
    Zur Wirkung des Chlorpromazin auf das Lipopolysaccharid-Fieber des Kaninchens (1968)
    Springer
    Clinical and experimental medicine 146 (1968), S. 125-138 
    Details
    ISSN: 1591-9528
    Keywords: Thermoregulation ; Fever ; Chlorpromazine ; Thermoregulation ; Fieber ; Chlorpromazin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In 160 Versuchen am Kaninchen wurde die Wirkung von Chlorpromazin, das besonders in den für die Wärmeregulation wichtigen zentralen Gebieten des Hypothalamus und der Formatio reticularis angereichert wird, auf die normale Körpertemperatur und die Fieberreaktion nach Gabe von Lipopolysacchariden gramnegativer Bakterien untersucht. Gemessen wurden die Rectal- und Ohrtemperatur, die Atem- und Herzfrequenz. Es ergab sich: 1. die Rectaltemperatur des unbeeinflußten Kaninchens wird bei einer Umgebungstemperatur von 22° C in Abhängigkeit von der Dosis gesenkt, 2. das Lipopolysaccharid-Fieber läßt sich durch Vorgabe von mehr als 1 mg/kg Chlorpromazin abschwächen oder unterdrücken, 3. die Reaktion in Empfängertieren durch Plasmaübertragung von fiebernden Spendertieren kann drei verschiedene Verlaufsformen ergeben: eingipflige, zweigipflige und afebrile. Eine Beziehung zur Größe des Spendertierfiebers bestand dabei nicht. Die Ergebnisse werden hauptsächlich durch die zentralen Angriffspunkte des Chlorpromazins erklärt.
    Notes: Summary Chlorpromazine concentrates particularly in that central regions of the CNS important for the thermoregulation, in the hypothalamus and the formatio reticularis. Therefore in 160 experiments on rabbits the effect of chlorpromazine was tested at the normal body temperature and the fever reaction after medication of lipopolysaccharides (LPS) from gramnegative bacteria. Measured were the rectal- and ear-temperature, the heart- and respiration-frequency. It resulted that: 1. the rectal temperature of untreated rabbits at environmental temperature of 22°C ± 2°C is lowered, dependant on the dose, 2. the LPS-fever is diminished or suppressed after premedication of 〉 1 mg/kg chlorpromazine, 3. the reaction in the recipient animal may proceed in three different types of fever: mono- and biphasic curves and an afebrile one. A relation to the height of fever of the donor animal was not existant. Analogue to other experiments with central acting pharmaca and local cerebral temperature-stimulations in the area of the anterior hypothalamus as well as considering the distribution of chlorpromazine in the CNS these results are explained by specific effects of chlorpromazine in the hypothalamus and the formatio reticularis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02043778
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  • 7
    Electronic Resource
    Electronic Resource
    A vivid model of chiral recognition (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 1 (1989), S. 167-169 
    Details
    ISSN: 0899-0042
    Keywords: enantioselectivity ; three-point model ; chiral receptors ; chiral separations ; didactic model ; elusion of the three-point model ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Hands can be used to demonstrate the three-point model of chiral recognition. The points of attachment are thumb, forefinger, and middle finger. This vivid model has the advantages of simplicity, perspicuity, and availability at any time, although two persons are necessary. It can be shown that two interactions are not sufficient for chiral recognition but that three attractive or two attractive and one repulsive attraction are needed. It can also be used to explain some possibilities of weakening or elusion of the three-point model.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/chir.530010211
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  • 8
    Electronic Resource
    Electronic Resource
    Welkstoffe und Antibiotika. 34. Mitteilung. Synthese von IsojavanicinDie Bezifferung der Strukturformeln erfolgt aus Gründen der Übersichtlichkeit wie in der Javanicin-Reihe. und vereinfachte. Synthese von Javanicin (1965)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 48 (1965), S. 538-553 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus 1,2,4-Trimethoxybenzol (I) wurde das 2-Methyl-3-acetonyl-7-methoxynaphtazarin (Isojavanicin) (XIIe) synthetisiert, wobei als entscheidende Aufbaureaktion die Einführung des Acetonylrestes durch MICHAEL-Addition von Acetessigsäure-benzylester an das 2-Methyl-5,7,8-trimethoxy-1,4-naphtochinon (VIII) erfolgte. Entgegen unseren früheren Versuchen ermöglichte die analoge Anlagerungsreaktion an 3-Methyl-5,7,8-trimethoxy-1,4-naphtochinon (XVII) eine wesentliche Vereinfachung der Synthese des Javanicins (XXa). Erwartungsgemäss zeigten Javanicin (XXa) und Isojavanicin (XIIe) in UV., IR., NMR. und Massenspektrogramm keine oder nur geringe, strukturell noch nicht interpretierbare Unterschiede, während die Mischprobe der beiden Substanzen eine überraschend grosse Schmelzpunktdepression gab.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19650480312
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  • 9
    Electronic Resource
    Electronic Resource
    Gas-chromatographische und massenspektrometrische Untersuchung von Phytylubichinon, Vitamin K1 und Vitamin K2 (1967)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 50 (1967), S. 1866-1879 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The trimethylsilyl ethers of reduced vitamins K1, K2, and of phytylubiquinone were investigated by means of gas chromatography and mass spectrometry.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19670500721
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  • 10
    Electronic Resource
    Electronic Resource
    Die Glykoside der Blätter von Isoplexis canariensis (L.) G. DONFür diese Digitalis-Art sind früher andere botanische Bezeichnungen wie Isoplexis canariensis L. und Callianassa canariensis (W. & B.) verwendet worden. Die neue, heir benützte Nomenklatur haben wir aus der Arbeit von Werner [1] übernommen.. 2. Mitteilung1. Mitteilung: P. STUDER et al. [2]. (1967)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 50 (1967), S. 1893-1911 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus den getrockneten Blättern von Isoplexis canariensis liess sich nach leichter Abänderung des früher [2] beschriebenen Verfahrens in etwa 1% Ausbeute ein Kristallisat gewinnen, das aus den zwei Glykosidgemischen «A» und «B» im ungefähren Verhältnis 1:4 besteht. Diese unterscheiden sich nur im Zuckerteil - Canarobiose beim Glykosid «A» und Digilanidobiose beim Glykosid «B» - und besitzen die gleichen Aglykone: Uzarigenin, Canarigenin und Xysmalogenin. -2 der 3 Komponenten des Glykosids «A», nämlich Uzarigenin-glucosido-canarosid und Canarigenin-glucosido-canarosid, konnten als einheitliche Kristallisate gewonnen und in die Desglucoprodukte übergeführt werden. Das der 3. Komponente des Glykosids «A» entsprechende Desglucoprodukt, das Xysmalogenin-canarosid, liess sich aus dem Monosidgemisch «e» [2] (das aus «A» durch enzymatische Hydrolyse entsteht) gewinnen. -Das Glykosid «B» konnte bisher noch nicht in seine 3 Komponenten aufgeteilt werden. Aus seinem Monosidgemisch «d» wurden Uzarigenin-digitoxosid sowie Canarigenin-digitoxosid als einheitliche Glykoside und, nach saurer Hydrolyse, Xysmalogenin, das Aglykon des dritten Digitoxosids von «d», gewonnen. - Aus den Mutterlaugen der Glykosidgemische «A» und «B» konnten noch die Substanzen C und «D» erhalten werden. C ist Canarigenin-glucosido-fucosid, während «D» ein Gemisch mehrerer Glykoside darstellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19670500724
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