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Reactions of arylglyoxals with tetrasulfur tetranitrides (S4N4): Formation of 2-aroyl-5-arylimidazoles and 2-aroyl-5-aryloxazoles

✍ Scribed by Yung Cheol Kong; Kyongtae Kim

Publisher: Journal of Heterocyclic Chemistry
Year: 1999
Tongue: English
Weight: 331 KB
Volume: 36
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570360414

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✦ Synopsis

Abstract

Treatment of arylglyoxal monohydrates with tetrasulfur tetranitride in p‐dioxane at reflux afforded 2‐aroyl‐5‐arylimidizoles and 2‐aroyl‐5‐aryloxazoles in 10 to 31% and 17 to 32% yields, respectively. With non‐hydrate of arylglyoxals, yields of the latter increase somewhat, whereas essentially no changes in yields of the former were observed. A mechanism is proposed for the formation of the products.

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