作者:V. A. Mamedov、I. A. Nuretdinov、F. G. Sibgatullina
DOI:10.1007/bf00863079
日期:1992.3
Cyclization of 2-methyl (or -phenyl)-5-phenylthiazole-4-carbohydrazides (1) and (2) under various conditions gives differing oxadiazoles: 2-(2'-substituted-5'-phenyl-4'-thiazolyl)-1,3,4-oxadiazole-5-thiones (7) and (8), and 2-(2'-substituted-5'-phenyl-4'-thiazolyl)-1,3,4-oxadiazoles (9) and (10). Cyclodehydration of thiazolecarbonyl-thiosemicarbazides (3)-(6) with NaOH gives the 3-(2'-substituted-5'-phenyl-4'-thiazolyl)-4-substituted-4H-5-mercapto-1,2,4-triazoles (11)-(14), while H3PO4 gives the 2-(2'-substituted-5-phenyl-4'-thiazolyl)-5-phenylamino-1,3,4-thiadiazoles (15) and (16).