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Spiro-heterocycles from substituted pyridines, pyrans and thiopyrans

✍ Scribed by Venkatapuram Padmavathi; Boggu Jagan Mohan Reddy; Boreddy Chandra; Obula Reddy; Adivireddy Padmaja

Book ID: 102342936
Publisher: Journal of Heterocyclic Chemistry
Year: 2004
Tongue: English
Weight: 50 KB
Volume: 41
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570410615

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✦ Synopsis

Abstract

A new class of spiro‐pyrimidines, pyrazoles and isoxazoles are prepared by nucleophilic reaction of 3,5‐diaroyl‐2,6‐diaryl‐piperidine‐4,4‐dicarbonitrile (1), 3,5‐diaroyl‐2,6‐diaryl‐tetrahydropyran‐4,4‐dicarbonitrile (2) and 3,5‐diaroyl‐2,6‐diaryl‐tetrahydrothiopyran‐4,4‐dicarbonitrile (3) with urea, N,N'‐dimethyl urea, thiourea, hydrazine hydrate and hydroxylamine hydrochloride.

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