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Synthesis and characterization of some 3-acyl-4-amino-1-aryl-1H-pyrazoles

✍ Scribed by Petr Šimůnek; Markéta Svobodová; Vladimír Macháček

Publisher
Journal of Heterocyclic Chemistry
Year
2009
Tongue
English
Weight
132 KB
Volume
46
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

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A series of 3‐acyl‐4‐amino‐1‐aryl‐1__H__‐pyrazoles has been prepared by reaction of β‐enaminones with benzenediazonium tetrafluoroborates substituted especially by fluorine‐containing groups (F, CF~3~, and OCF~3~). The compounds prepared have been characterized by means of ^1^H and ^13^C NMR spectroscopy. In the case of reaction of 5‐phenylaminohept‐4‐en‐3‐one with 2,6‐dichloro‐4‐trifluoromethylbenzenediazonium tetrafluoroborate the product of azo coupling on phenylamino group of the corresponding pyrazole has been isolated and identified. The intermediate (4‐(4‐methoxyphenyldiazenyl)‐5‐methylaminohept‐4‐en‐3‐one) on the route from enaminone to pyrazole has been isolated. J. Heterocyclic Chem., (2009).

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