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Reactions of aroylthioureas with acetylenic esters and dibenzoyl ethylene. Selectivity towards the formation of new 1,3-thiazines

✍ Scribed by Ashraf A Aly; Essam K. Ahmed; Khalad M. El-Mokadam

Publisher: Journal of Heterocyclic Chemistry
Year: 2007
Tongue: English
Weight: 561 KB
Volume: 44
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570440630

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✦ Synopsis

Abstract

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A series of 1,3‐thiazines has been synthesized by the reactions of N‐aroylsubstituted thioureas with ethyl propiolate, dimethyl but‐2‐ynedioate and (E)‐1,4‐diphenyl‐but‐2‐ene‐1,4‐dione. The reaction of antipyrinylphenyl thiourea with π‐deficient acetylenic reagents did not afford the corresponding 1,3‐thiazines, whereas pyrrolo‐pyrazolopyrimidines were obtained.

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