One pot synthesis and reactions of novel 5-amino[1,3]thiazolo[3,2-b][1,2,4]triazoles

Mercapto-3-phenyl-1,2,4-triazole 8 was reacted with a variety of cyano compounds containing active methylene group such as ethyl cyanoacetate, cyanoacetamide and malonitrile in boiling acetic acid in the presence of concentrated sulfuric acid, to give the corresponding 5-amino-2- phenyl(1,3)thiazolo(3,2-b)(1,2,4)triazole-6-carboxylate 10a. While on using cyanoacetamide or