Reactions with hydrazonoyl halides. Part 16. A convenient synthesis of 1,4-benzothiazine, triazolo[4,3-a]benzimidazole, thiazolo[3,2-a]benzimidazole and 2,3-dihydro-1,3,4-thiadiazole derivatives

摘要

A synthesis of 1,4-benzothiazines, triazolo[4,3-a]benzimidazole, thiazoles and 2,3-dihydro-1,3,4-thiadiazoles has been accomplished from th a reaction of hydrazonoyl bromide 1 with 2-aminobenzenethiol, benzimidazole-2-thiol, 2-methylsulfanylbenzimidazole, dithiocarbamate and dithiocarbazate.