A. Ikizler et al., THE REACTION OF ESTER ETHOXYCARBONYLHYDRAZONES WITH CARBOXYLIC-ACID HYDRAZIDES, Polish Journal of Chemistry, 70(9), 1996, pp. 1114-1120
Ester ethoxycarbonylhydrazones 1 were reacted with some monocarboxylic
acid hydrazides and the corresponding 5-dialkyl-4-ethoxycarbonylamino
-4H-1,2,4-triazoles 2-5 were obtained. Treatment of 1d with malonodihy
drazide led to the formation of a ditriazolylmethane 6d. But, -alkyl-4
-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones 10 were obtained from the r
eaction of compounds 1 with carbohydrazide.