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  • 1
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 50 (1963), S. 568-569 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 640-654 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Benzothiazole N-Oxides, I. Synthesis and Reactivity of 2-Alkoxycarbonylbenzothiazole N-OxidesTreatment of nitrochlorobenzenes 1 with thioglycolic esters 2 gives the 2-alkoxycarbonylbenzothiazole N-oxides 4 in one reaction step1). The scope of application for the new synthesis is outlined by quoting 17 examples. The reaction of the N-oxides 4 with aqueous sodium hydroxide solution, amines, hydrazine and hydroxylamine are described. The selective reduction of the N-oxides makes it possible to synthesize benzothiazoles which have so far been difficultly or not at all accessible. Spectroscopie data are discussed.
    Notes: Die Umsetzung von Nitrochlorbenzolen 1 mit Thioglykolsäuresstern 2 führt in einem Reaktionsschritt zu den 2-Alkoxycarbonylbenzthizol-N-oxiden 41). Der Anwendungsbereich der neuen Synthese wird mit 17 Beispielen umrissen. Die Reaktionen der N-Oxide 4 mit Natronlauge, Aminen, Hydrazin und Hydroxylamin werden beschrieben. Die selektive Reduktion der N-Oxide gestattet die Synthese bislang nicht oder nur schwierig zugänglicher Benzthiazole. Spektroskopische Daten werden diskutiert.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 3603-3604 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1982 (1982), S. 884-893 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Enehydrazines, I.  -  Acylation of Tautomerizable EnehydrazinesThe C-acylation products 3, 5, 7, 9, 12, and 14 are synthesized by acylation of the enehydrazine carboxylic acid esters or amides 1, 6, 8, and 10 with acyl chlorides, sulfenyl chlorides, and iso-(thio)cyanates. The enehydrazine carbonitriles 16 and 19 react with acyl chlorides by ring closure reaction to give the 5-(acylamino)pyrazole derivatives 18 and 21. Some spectroscopic data of the reaction products are given.
    Notes: Durch Acylierung der Enhydrazinocarbonsäure-ester und -amide 1, 6, 8 und 10 mit Carbonsäurechloriden, Sulfensäurechloriden oder Iso(thio)cyanaten werden die C-Acylierungsprodukte 3, 5, 7, 9, 12 und 14 erhalten. Die Enhydrazinocarbonitrile 16 und 19 reagieren mit Carbonsäurechloriden unter Ringschluß zu den 5-(Acylamino)pyrazolderivaten 18 und 21. Einige spektroskopische Daten der Reaktionsprodukte werden angegeben.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1987 (1987), S. 871-879 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cycloaracylation of Enamines, II1,2). - Synthesis of 1-Amino-4-quinolone-3-carboxylic AcidsThe 2-benzoyl-3-hydrazinoacrylic esters 3, 11, 17, and 23 are obtained by the reactions of 2-chloro-5-nitrobenzoyl chloride (1) with the enehydrazinocarboxylic esters 2 and 2-benzoyl-3-ethoxyacrylic esters 9 with hydrazine derivatives 10, 16, and 22. After cyclocondensation, the above esters afford 1-aminoquinolone-carboxylic esters 4, 12, 18, and 24, which are hydrolyzed to give the corresponding 1-aminoquinolonecarboxylic acids 5, 13, 19, and 26. The 1-amino-7-haloquinolonecarboxylic acids 13a-f, 19a-f, and 26b react with aliphatic amines to afford 1,7-diaminoquinolonecarboxylic acids 30c-m, which possess a high level of bactericidal activity.
    Notes: Durch Umsetzung von 2-Chlor-5-nitrobenzoylchlorid (1) mit den Enhydrazinocarbonsäureestern 2 sowie der 2-Benzoyl-3-ethoxyacrylsäureester 9 mit den Hydrazinderivaten 10, 16 und 22 werden die 2-Benzoyl-3-hydrazinoacrylsäureester 3, 11, 17 und 23 erhalten. Letztere liefern bei der Cyclokondensation die 1-Aminochinoloncarbonsäureester 4, 12, 18 und 24, die zu den entsprechenden 1-Aminochinoloncarbonsäuren 5, 13, 19 und 26 hydrolysiert werden. Die 1-Amino-7-halogen-chinoloncarbonsäuren 13a-f, 19a-f und 26b reagieren mit aliphatischen Aminen zu den antibakteriell hochwirksamen 1,7-Diaminochinoloncarbonsäuren 30c-m.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: High Temperature Chlorination of Cyanoalkylated Secondary Amines, I. Cyanoethylated Pyrrolidine, Piperidine, and HexamethyleneimineChlorination of the cyanoethylated amines 7 and 28 at temperatures up to approximately 150° and the subsequent heating in a high vacuum yields the perchlorinated, conjugated bicyclic compounds 8 and 29. Chlorination of 7 at about 200° results in the formation of the pyrimidines 13 and 14. Cyanoethylated piperidine 15 yields the acylated derivatives 16, 23, 24, and 25 of the 6-amino-2.3.4.5-tetrachloropyridine (18) when chlorinated at 150-300°.
    Notes: Chlorierung der cyanäthylierten Amine 7 und 28 bei ≦ 150° und anschließendes Erhitzen im Hochvakuum liefert die perchlorierten, durchlaufend konjugierten Bicyclen 8 und 29. Durch Chlorieren von 7 bei ≦200° erhält man die Pyrimidine 13 und 14. Cyanäthyliertes Piperidin 15 ergibt durch Chlorieren zwischen 150 und 300° die acylierten Derivate 16, 23, 24 und 25 des 2.3.4.5-Tetrachlor-6-amino-pyridins (18).
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 764 (1973), S. 36-43 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Naphthoquinone Aldehydes, III1). - 2-(1,4-Naphthoquinon-2-yl)-2-methylpropionic Acid and Its ReactionsThe title compound 2, which is obtained by oxidation of the aldehyde 1 with nitric acid, easily decarboxylates yielding dimers probably via intermediate radicals. With SOCl2 2 yields the chlorolactone 8 and on reduction the lactone 9 whose reactions with hydrazine to 10 and phenylhydrazine to 11 are described. On oxidation 11 rearranges to form the azodyestuff 13. Reaction of 9 with isoamyl nitrite leads to the dimeric lactone 16, nitration of 2 or 9 with nitric-sulphuric acid leads to the nitronaphthoquinonylmethylpropionic acids 17 and 18.
    Notes: Die Titelverbindung 2, die sich durch Salpetersäure-Oxidation aus dem Aldehyd 1 herstellen läßt, decarboxyliert leicht, wobei, wahrscheinlich über radikalische Zwischenstufen, „Dimere“ entstehen. Mit SOCl2 bildet 2 das Chlorlacton 8, bei Reduktion das Lacton 9, dessen Umsetzungen mit Hydrazin zu 10 und Phenylhydrazin zu 11 beschrieben werden. 11 lagert sich bei der Oxidation zum Azofarbstoff 13 um. Die Einwirkung von Isoamylnitrit auf 9 führt zum dimeren Lacton 16, die Nitrierung von 2 oder 9 mit Salpetersäure/Schwefelsäure zu den Nitro-naphthochinon-methyl-propionsäuren 17 und 18.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1978 (1978), S. 280-282 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of 1-(Arylmethylenamino)isatins with Amines1-(Arylmethyleneamino)isatins 1 react with amines to afford 2-(arylmethylenehydrazino)-α-oxophenylacetamides 2.
    Notes: 1-(Arylmethylenamino)isatine 1 liefern mit Aminen 2-(Arylmethylenhydrazino)-α-oxophenylacetamide 2.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,2-Dihydro-3H-xanthenes from Salicylaldehydes and EnaminesSalicylaldehydes 1 and pyrrolidine enamines 2b give 1,2-dihydro-3H-xanthenes 5, the amino alcohols 3 being the first and unsaturated amino ketals 7 and 10 being the secondary inter-mediates. Reaction of acyl isocyanates with xanthenes 5 yields the amides 12.
    Notes: Salicylaldehyde 1 und Pyrrolidin-enamin 2 b reagieren über die Stufe der Aminoalkohole 3 zu den 1,2-Dihydro-3H-xanthenen 5; in zwei Fällen konnten ungesättigte Aminoketale 7 und 10 als zweite Zwischenstufe gefaßt werden. Die Xanthene 5 reagieren mit Acylisocyanaten zu den Amiden 12.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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