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Facile one-pot synthesis of [1,2,4]triazolo[3,4-b][1,3,4]thiadiazines and 3,7-dimethyl-4H-[1,2,4]triazino[3,4-b][1,3,4]thiadiazin-6-one using heteropolyacid catalysts

✍ Scribed by Radineh Motamedi; Aazam Monfared; Zohre Ghahghai Nezamabadi; Fatemeh F. Bamoharram

Publisher: Journal of Heterocyclic Chemistry
Year: 2011
Tongue: English
Weight: 73 KB
Volume: 48
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.407

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✦ Synopsis

Abstract

[1,2,4]Triazolo[3,4‐b][1,3,4]thiadiazines 2a, 2b, 2c, 2d, 2e, 2f and 3,7‐dimethyl‐4__H__‐[1,2,4]triazino[3,4‐b][1,3,4]thiadiazin‐6‐one 4 were synthesized by one‐pot cyclocondensation reaction with α‐chloroacetonitrile and α‐haloketones in the presence of catalytic amounts of heteropolyacids in very high yields and rates. J. Heterocyclic Chem., (2011).

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