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  • 1
    Electronic Resource
    Electronic Resource
    α-Cyanothioacetamide and its derivatives in heterocyclic synthesis: Preparation of several new 4-oxoquinazoline derivatives (1990)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 332 (1990), S. 610-618 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of α-cyanothioacetamide (1) or its methylthio derivative (2) with anthranilic acid led to the formation of 3,4-dihydro-4-oxoquinazolin-2-yl acetonitrile (3). 3 condensed with aromatic aldehydes to give arylidene derivatives (4a-d) which could be prepared also via the reaction of 2-thiocarbamoylcinnamonitriles (5a-d) or their methylthio derivatives (6a-d) with anthranilic acid. 3 reacted with cinnamonitrile derivatives (7a-h) and (12a-d) to yield pyrido-[1,2-a]-quinazoline derivatives (10a-h) and (15a-d) which could also be prepared by the reaction of (4a-d) with malononitrile (11a), benzoyl acetonitrile (11b) and ethylcyanoacetate (16), respectively.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19903320505
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Reactivity of the Methylene Group and cleavage of S-alkyl groups in 1-alkylmercapto-3(4H)-isoquinolone derivatives (1971)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 313 (1971), S. 1039-1050 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Treatment of 2a-thiohomophthalimide 1a and 4-phenylthiohomophthalimide 1b with alkyl halides gave the products 2a-e. By further alkylation of 2a, d the corresponding ethers 3a-h were obtained. When 2a, c were treated with aryl diazonium chloride, the red azo compounds 4a-f were separated. Also 2a-c were found to react with aliphatic and aromatic aldehydes to give the bis-compounds 8a-c and 9a-f respectively.The S-alkyl group present in the aryl azo derivatives 4 was found to be cleaved by treating them independently with phenyl hydrazine, hydroxylamine and primary aromatic amines to give compounds 10, 11 and 12 respectively.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19713130607
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Action of GRIGNARD reagent on 5-arylidene-2-thiohydantoins. Addition reactions of diazomethane and piperidine on alkylmercapto hydantoin derivatives (1971)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 313 (1971), S. 1031-1038 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Treatment of 3a-e with GRIGNARD reagent does not effect hetero-ring opening, but the double of the lateral chain enters into reaction yielding the products 4a-n. Treatment of 3b with ethereal diazomethane gave 6a. By further methylation of the alkylmercapto derivatives 6a-e with diazomethane, the cyclopropane products 9a-e were obtained. When the highly coloured benzene solutions of 3b, c and 6b were treated with piperidine, colourless products 10a, b, 11 were separated.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19713130606
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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