An Efficient Route to Ethyl 5-Alkyl- (Aryl)-1<i>H</i>-1,2,4-triazole-3-carboxylates
作者:M. V. Chudinov、A. V. Matveev、N. I. Zhurilo、A. N. Prutkov、V. I. Shvets
DOI:10.1002/jhet.1934
日期:2015.9
An efficient general route to the synthesis of 5‐substituted 1H‐1,2,4‐triazole‐3‐carboxylates was developed. N‐acylamidrazones were obtained from carboxylic acid hydrazides and ethyl thiooxamate or ethyl 2‐ethoxy‐2‐iminoacetate hydrochloride and then were reacted with chloroanhydride of the same carboxylic acid. As the next step, diacylamidrazones were cyclized to 5‐substituted 1H‐1,2,4‐triazole‐3‐carboxylates