... 1976 The Chemistry of J ,2,5-Thiadiazoles V. Synthesis of 3,4-Diamino-l ... 2747 from the Department of Chemistry, Indiana University, Bloomington, Indiana 47401 Received August 4, 1975 ... In order to synthesize additional heterocyclic com- pounds analogous to f 1,2,5]thiadiazolo ...