ISSN:
0021-8383
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
3-Nitromethyl-pyrazoles from 2-Cyano-3-methylthio-4-nitrocrotonic Acid Derivatives2-Cyano-3-methylthio-4-nitrocrotonic Acid Derivatives 1a, b react with hydrazines to form the 5-amino-3-nitromethyl-pyrazoles 2a-c and the 5-nitromethyl-pyrazol-3-one 3 respectively. Contrary to this carboxylic hydrazides attacks the nitro group. For the resulting products the structure of pyrrol-2,5-dione oximes 4 is proposed. On the similar way from 3-methylthio-4-nitro-2-phenylcrotononitrile 1c and phenylhydrazine the pyrrol-2,5-dione hydrazone 5 arises. Subsequent reactions of 2 yield 3-nitromethyl-pyrazole derivatives 6, 3-nitromethyl-azinones 8 and nitromethyl-pyrazolyl-azo compounds 10.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19833250106
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