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2-Pyrazolines from 1,3 - dipolar cycloaddition of diazomethane to arylsulfonylethenes

✍ Scribed by Venkatapuram Padmavathi; Mudigonda Rajagopala Sarma; Adivireddy Padmaja; Dandu Bhaskar Reddy

Publisher: Journal of Heterocyclic Chemistry
Year: 2003
Tongue: English
Weight: 50 KB
Volume: 40
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570400531

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✦ Synopsis

Abstract

Novel 2‐pyrazolines were obtained by the cycloaddition of diazomethane to bis(arylsulfonylethenyl)‐sulfones (3) and 1‐arylsulfonyl‐2‐styrylsulfonylethenes (7). Dehydrogenation of 2‐pyrazolines with chloranil gave pyrazoles.

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