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Preparation of 1H-pyrazole-5-carboxamides from dilithiated C(α), N-phenylhydrazones and lithiated ethyl oxanilates or lithiated ethyl oxamate

✍ Scribed by Jennifer R. Downs; Stefan J. Pastine; Deborah A. Schady; Heather A. Greer; Wayne Kelley Jr.; Mildred C. Embree; Jessica D. Townsend; Charles F. Beam

Publisher: Journal of Heterocyclic Chemistry
Year: 2001
Tongue: English
Weight: 39 KB
Volume: 38
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570380325

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✦ Synopsis

Abstract

Dilithiated C(α), N‐phenylhydrazones were prepared in excess lithium diisopropylamide and condensed with either ethyl oxanilate, ethyl 4′‐chlorooxanilate, or ethyl oxamate to give intermediates that were quenched and acid cyclized to substituted l__H__‐pyrazole‐5‐carboxamides.

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