Synthesis of 1-aryl(hetaryl)pyrazol-5-ols and azopyrazoles on their basis

Autor:	Dmitry N. Kuznetsov, K. I. Kobrakov, A. G. Ruchkina
Rok vydání:	2011
Předmět:	chemistry.chemical_compound Chemistry Aryl Organic Chemistry Acetoacetic ester synthesis Organic chemistry
Zdroj:	Chemistry of Heterocyclic Compounds. 47:441-447
ISSN:	1573-8353 0009-3122
DOI:	10.1007/s10593-011-0778-0
Popis:	Treatment of 3,5-dichloropyrid-2-ylhydrazine, and of mono- and dinitrophenylhydrazines with acetoacetic ester gave hydrazones and the products of their cyclization, namely pyrazolols. It was shown that acetoacetic ester 2,4-dinitrophenylhydrazone cyclizes to the pyrazolol only by using PPA while other studied hydrazones undergo tarring under these conditions. The products of azocoupling of pyrazolols with 3-diazonio-4-hydroxy-5-nitrobenzenesulfonate or 2-hydroxy-5-nitrophenyldiazonium salts are able to color textile materials. The fungicidal activity of the synthesized compounds has been studied.
Databáze:	OpenAIRE
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