An Efficient Regioselective Synthesis of 7-Substituted 1,3-Dimethyl-4-oxo-4H-1,3,4-thiadiazolo[2,3-c]-1,2,4-triazinium Cations

Abstract

A number of 7-substituted 1,3-dimethyl-4-oxo-4H-1,3,4-thiadiazolo[2,3-c]-1,2,4-triazinium perchlorates 3 have been prepared by sequential treatment of 4-amino-2,6-dimethyl-5-oxo-3-thioxo-2,3,4,5-tetrahydro-1,2,4-triazine 1 with acyl chlorides and acetic anhydride/perchloric acid.