✦ LIBER ✦

A study of the reactions of 2-aryl-4-hydroxy-6H-1,3-thiazin-6-ones with chromone-3-carboxaldehydes

✍ Scribed by Roman V. Shutov; Elizaveta V. Kuklina; Boris A. Ivin

Book ID: 104098588
Publisher: Elsevier Science
Year: 2011
Tongue: French
Weight: 298 KB
Volume: 52
Category: Article
ISSN: 0040-4039
DOI: 10.1016/j.tetlet.2010.11.023

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✦ Synopsis

a b s t r a c t Reaction of 3-formylchromones with 2-aryl-4-hydroxy-6H-1,3-thiazin-6-ones in the presence of pyridine leads to formation of a mixture of novel N-thioaroyl-5-hydroxy-2H,5H-pyrano[3,2-c]chromen-2-one-3carboxamides and 2-aryl-5-(4 0 -oxochromen-3 0 -yl)-6,7-dihydro-4H, 5H-pyrano[2,3-d][1,3]thiazine-4,7diones. The yields of these compounds clearly depend on the nature of the substituent on the 3-formylchromone and on the reaction conditions.

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