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
开发了一种高效的合成5位取代的1 H -1,2,4-三唑-3-羧酸盐的通用路线。N-酰胺基叠氮酮是从羧酸酰肼和硫代草酸乙酯或2-乙氧基-2-亚氨基乙酸乙酯盐酸盐中制得的,然后与相同羧酸的氯酐反应。作为下一个步骤,diacylamidrazones被环化成5-取代的1 ħ -1,2,4-三唑-3-羧酸一锅在温和的条件。