Solid Acid Induced Cyclocondensation: A Facile, One-Pot Synthesis of 7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines
作者:M. M. Heravi、M. Bakherad、M. Rahimzadeh、M. Bakavoli
DOI:10.1080/10426500214303
日期:2002.10
7H-[1,2,4]Triazolo[3,4-b][1,3,4]thiadiazines are synthesized in good yields by the catalytic action of sulfuric acid adsorbed on sillica gel. Starting from 4-amino-5-substituted-1,2,4-triazole-3-thiones and employing cyclocondensation reaction with f -chloroacetonitrile and f -haloketones, the desired triazolothiadiazines have been synthesized satisfactorilly.
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
作者:Radineh Motamedi、Aazam Monfared、Zohre Ghahghai Nezamabadi、Fatemeh F. Bamoharram
DOI:10.1002/jhet.407
日期:2011.5
[1,2,4]Triazolo[3,4‐b][1,3,4]thiadiazines 2a, 2b, 2c, 2d, 2e, 2f and 3,7‐dimethyl‐4H‐[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).