Studies on Mesoionic Compounds. Part 11. Alkylation of 5-Acylamino-1,2,3-thiadiazoles
The alkylations of 5-acylamino-1,2,3-thiadiazoles (4) have been investigated; the N-3 position is preferably alkylated forming new mesoionic heterocycles (5) and (10).The mesoionic 1,2,3-thiadiazolium-5-alkoxy- and -5-aryloxy-carbonylaminides are converte