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  • 1970-1974  (23)
  • Chemistry  (23)
  • Inorganic Chemistry  (15)
  • General Chemistry  (3)
  • Lactones
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  • 11
    Electronic Resource
    Electronic Resource
    Reaktionen mit Halogenwasserstoffaddukten der Nitrile, III Ein neue Pyridinsynthese (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 389-397 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Hydrogen Halide Adducts of Nitriles, III. New Synthesis of PyridinesThe reactions of unsaturated γ-cyanocarboxylic acid chlorides (3, 6, 9, 12) with hydrogen chloride in aliphatic ethers yield 6-chloro-2-pyridones (13-16). In order to study the structure of these compounds, they were converted to 6-chloro-2-methoxypyridines 20-23 and 6-chloro-l-methyl-2 pyridones 24-27.
    Notes: Die Reaktion von ungesättigten γ-Cyan-carbonsäurechloriden (3, 6, 9, 12) mit Chlorwasserstoff führt zu 6-Chlor-Pyridonen-(2) (13-16). Diese werden in die für Strukturuntersuchungen erforderlichen 6-Chlor-2-methoxy-pyridine 20-23 und 6-Chlor-l-methyl-pyridone-(2) 24-27 übergeführt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030209
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  • 12
    Electronic Resource
    Electronic Resource
    Orthoamide, XXV. Synthese und Reaktionen von [α-(Dimethylaminomethylen)-benzyl]triphenylphosphonium-Salzen (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 3732-3742 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Orthoamides, XXV. Synthesis and Reactions of [α-(Dimethylaminomethylene)benzyl]triphenylphosphonium SaltsBenzyltriphenylphosphonium salts (1) react with the aminal tert-butyl ester 2 to give [α-(dimethylaminomethylene)benzyl]triphenylphosphonium salts (3) or the corresponding ylenes, the benzylidenetriphenylphosphoranes (4). Hydrolysis of [α-(dimethylaminomethylene)-4-methoxybenzyl]triphenylphosphonium bromide tetrahydrate (3b · 4H2O) with aqueous potassium hydroxide results in elimination of benzene and formation of [α-(dimethylaminomethylene)-4-methoxybenzyl]diphenylphosphine oxide (8). Reaction of [α-(dimethylaminomethylene)benzyl]triphenylphosphonium bromide (3a) with sodium ethoxide affords ω-(dimethylamino)styrene (9) and triphenylphosphine oxide.
    Notes: Benzyltriphenylphosphonium-Salze (1) reagieren mit dem Aminal-tert-butylester 2 zu [α-(Dimethylaminomethylen)benzyl]triphenylphosphonium-Salzen (3) oder zu Ylenen, den Benzylidentriphenylphosphoranen (4). Die Hydrolyse von [α-(Dimethylaminomethylen)-4-methoxybenzyl]triphenylphosphonium-bromid-Tetrahydrat (3b · 4H2O) mit wäßriger Kalilauge führt unter Abspaltung von Benzol zu [α-(Dimethylaminomethylen)-4-methoxybenzyl]diphenylphosphinoxid (8). Mit Natriumäthylat entstehen aus [α-(Dimethylaminomethylen)benzyl]triphenylphosphoniumbromid (3a) ω-(Dimethylamino)styrol (9) und Triphenylphosphinoxid.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731061132
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  • 13
    Electronic Resource
    Electronic Resource
    Synthesen in der heterocyclischen Reihe, XVIII. Synthese des Pyrimido[4,5-d]pyrimidins (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 3743-3752 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses in the Heterocyclic Series, XVIII. Synthesis of Pyrimido[4,5-d]pyrimidine4-Amino-5-pyrimidinecarbaldehyde dimethyl acetal (2a) as well as its 2-methyl (2b) and 2-phenyl derivative (2c) react with equimolar amounts of s-triazine in the heat to give the 4-(4-amino-5-pyrimidinylmethyleneamino)-5-pyrimidinecarbaldehyde dimethyl acetals 3a-c. With an excess of 5 moles of s-triazine 2a and c react after melting to yield the pyrimido[4,5-d]-pyrimidines 4a and c; under the same conditions 2b reacts to afford 4-(aminomethyleneamino)-2-methyl-5-pyrimidinecarbaldehyde (7). With an excess of 3 moles of s-triazine 2a and b react in the heat to give the 4-methoxy-3,4-dihydropyrimido[4,5-d]pyrimidines 8a and b.
    Notes: Aus molaren Mengen 4-Amino-5-pyrimidincarbaldehyd-dimethylacetal (2a) sowie dessen 2-Methyl- (2b) und 2-Phenyl-Derivat (2c) und s-Triazin entstehen in der Hitze die 4-(4-Amino-5-pyrimidinylmethylenamino)-5-pyrimidincarbaldehyd-dimethylacetale 3a-c. Mit einem 5-molaren Überschuß an s-Triazin erhält man nach einer Schmelzreaktion mit 2a und c die Pyrimido[4,5-d]pyrimidine 4a und c und mit 2b den 4-(Aminomethylenamino)-2-methyl-5-pyrimidincarbaldehyd (7). Mit einem 3-molaren s-Triazin-Überschuß entstehen in der Hitze mit 2a und b die 4-Methoxy-3,4-dihydropyrimido[4,5-d]pyrimidine 8a und b.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731061133
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  • 14
    Electronic Resource
    Electronic Resource
    Reaktionen mit Halogenwasserstoffaddukten der Nitrile, V Synthese von Derivaten des 3.4-Dihydro-pyridins (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 407-412 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Hydrogen Halide Adducts of Nitriles, V Synthesis of 3,4-Dihydropyridines6-Chloro-5-aryl-3,4-dihydro-2-pyridones (6-9) are obtained by reaction of 4-aryl-4-cyanobutyryl chlorides (1-4) with hydrogen chloride in p-dioxane. The cyclisation reactions are only possible if α-chloro-enamines can be formed as intermediates.
    Notes: 4-Aryl-4-cyan-butyrylchloride (1-4) cyclisieren in Gegenwart von Chlorwasserstoff zu 6-Chlor-5-aryl-3.4-dihydro-pyridonen-(2) (6-9). Die Ringschlußreaktion erfolgt nur dann, wenn intermediär α-Chlor-enamine gebildet werden können.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030211
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  • 15
    Electronic Resource
    Electronic Resource
    Orthoamid, XIV. Über die Umsetzung von p-Tolyl- und Anisaldehyd mit einem Aminal-tert.-butylester zu [1.2-Bis-dimethylamino-vinyl]-aryl-ketonen (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2980-2983 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Orthoamides, XIV. On the Reaction of p-Tolyl- and Anisaldehyde with Formic Acid Bis(dimethylaminal) tert-Butyl Ester to [1,2-Bis(dimethylamino)vinyl]-aryl Ketones (4, 5). The reaction is supposed to proceed via bis(dimethylamino)methyl aryl ketone (A, which undergoes disproportionation in a kind of Cannizzaro reaction to yield dimethylaminomethyl aryl ketone 6, isolated as an intermediate.
    Notes: Aus tert-Tolyl(1) bzw. Anisaldehyd (2) entstehen mit Bis-dimethylamino-tert-. butyloxy-methan (3) [1.2-Bis-dimethylamino-vinyl]-aryl-aryl-ketone (4, 5). Ihre Bildung wird über ein intermediäres Bis-dimethylaminomethyl-aryl-keton (A gedeutet, das in einer Art Cannizzaro-Reaktion u.a. das als Zwischenprodukt isolierte Dimethylaminomethyl-aryl-keton 6 ergibt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030935
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  • 16
    Electronic Resource
    Electronic Resource
    Neue Synthese des Chinazolinsystems (1970)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 82 (1970), S. 548-549 
    Details
    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.19700821406
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  • 17
    Electronic Resource
    Electronic Resource
    Orthoamide, XXIII1) Umsetzungen von Orthoamidderivaten mit Verbindungen der Struktur X-CH2-CH2-Y (1972)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 762 (1972), S. 62-72 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Orthoamides, XXIII1). - Reaction of Ortho Amide Derivatives with Compounds of the Type X-CH2-CH2-Y.Reaction of the bisdialkylaminoalkoxymethanes (aminal esters) 1a, b, d and trimorpholinomethane (amide aminal, 5) with compounds of the type X-CH2-CH2-Y (X and Y = electron attracting groups) gives the mono- and bis-dialkyiaminomethylene compounds 3 or 4 by abstraction of alcohol or dialkylaminomethane.
    Notes: Die Bis-dialkylamino-alkoxy-methane (Aminalester) 1a, b, d und Trimorpholino-methan (Amidaminal, 5) reagieren mit Verbindungen der Struktur X-CH2-CH2-Y, wobei X und Y elektronenanziehende Gruppen darstellen, unter Abspaltung von Alkohol und Dialkylamin zu den Mono- und Bis-dialkylaminomethylen-Verbindungen 3 bzw. 4.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19727620107
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  • 18
    Electronic Resource
    Electronic Resource
    Synthesen in der heterocyclischen Reihe, XIII1) Über die Nitrosierung CH-acider Alkylgruppen an Heterocyclen (1970)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 737 (1970), S. 39-45 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses in the Heterocyclic Series, XIII1). Nitrosation of Acidic Alkyl Hydrogen in Heterocyclic CompoundsOn nitrosation with ethyl nitrite in the presence of an excess of hydrogen chloride, methylheterocycles afford hydrochloride salts of the aldoximes which may be liberated by treatment with aqueous potassium hydrogen carbonate. Formation of a quasi-p-quinoid intermediate is thought to be a necessary step in the course of the reaction.
    Notes: Die Nitrosierung von Methylheterocyclen mit Äthylnitrit in Gegenwart von überschüssiger Salzsäure führt zu den Aldoxim-hydrochloriden, die sich mit wäßriger Kaliumhydrogencarbonat-Lösung in die freien Aldoxime (Tab. 1, S. 44) überführen lassen. Für den Reaktionsablauf wird die Ausbildung eines quasi-p-chinoiden Zwischenproduktes gefordert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19707370104
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  • 19
    Electronic Resource
    Electronic Resource
    Synthesen in der heterocyclischen Reihe, XIV1) Formylierung von 4-Methyl-pyrimidin und Reaktionen des 2-[Pyrimidinyl-(4)]-malondialdehyds (1970)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 737 (1970), S. 46-52 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses in the Heterocyclic Series, XIV1). Formylation of 4-Methylpyrimidine and Reactions of 2-[4-Pyrimidinyl]-malondialdehydeWith an excess of dimethylchloromethyleneiminium chloride 4-methylpyrimidine (1) gives 2-[4-pyrimidinyl]-malonic-dialdehyde (2), while with the stoichiometric quantity of the chloride and of hydrogen chloride N,N-dimethyl-2-[4-pyrimidinyl]-vinylamine (3) is formed. In the same way as the nitrosation this reaction is believed to proceed by a quasi p-quinoid intermediate. On reaction with hydrazines or formamide, 2 yields 4-[4-pyrazolyl]-pyrimidines (4, 5) or 4-[5-pyrimidinyl]-pyrimidine (6); on reaction with N-alkyl-substituted salts of benzothiazole or benzoselenazole γ-substituted pentacyanines (10a-c and 12) result.
    Notes: Die Formylierung von 4-Methyl-pyrimidin (1) mit überschüssigem Dimethylformamidchlorid (Dimethyl-chlormethylen-immoniumchlorid) zu 2-[Pyrimidinyl-(4)]-malondialdehyd (2) und mit äquimolaren Mengen Dimethylformamidchlorid/HCl zu N.N-Dimethyl-2-[pyrimidinyl-(4)]-vinylamin (3) erfolgt analog der Nitrosierung über ein quasi-p-chinoides Zwischenprodukt. 2 gibt mit Hydrazinen bzw. Formamid Ringschluß-Reaktionen zu 4-[Pyrazolyl-(4)]-pyrimidinen (4, 5) bzw. 4-[Pyrimidinyl-(5)]-pyrimidin (6); mit N-Alkyl-substituierten Benzthiazolium- oder Benzselenazolium-Salzen entstehen γ-substituierte Pentamethincyanin-Farbstoffe (10a-c und 12).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19707370105
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  • 20
    Electronic Resource
    Electronic Resource
    Synthese und Struktur von 3-IsochinolinolenHerrn Professor Dr. H. Bredereck in Dankbarkeit und Verehrung zum 70. Geburtstag gewidmet. (1974)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 1802-1815 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Structure of 3-Isoquinolinols**)1-Halogeno-3-isoquinolinols 2-4 are prepared by cyclization of (2-cyanophenyl)acetyl chlorides 1 in presence of anhydrous hydrogen halides. Catalytic hydrogenation gives the 3-isoquinolinols 8. The lactam-lactim tautomerism of these compounds is discussed.
    Notes: (2-Cyanphenyl)acetylchloride 1 cyclisieren in Gegenwart wasserfreier Halogenwasserstoffsäuren zu I-Halogen-3-isochinolinolen 2-4. Durch katalytische Hydrierung erhält man aus diesen die 3-Isochinolinole 8. Die Lactam-Lactim-Tautomerie dieser Verbindungsklassen wird untersucht.
    Additional Material: 10 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197419741110
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