Three thiadiazoles were isolated, depending on reaction conditions, from reactions of I11 with benzylamine. Treatment of I11 with refluxing benzylamine for 6.5 hr. resulted in the formation of 4-amino-N-benzyl-l12, 5-thiadiazole-3-carboxamide (XI); the byproduct, N, N'- dibenzylurea, was also isolated in high yield. N-Benzyl-4-(3-benz ylureido)-1, 2, 5- thiadiazole-3-carboxamide (Xa) was isolated following interaction of I11 and refluxing ...
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