Synthetic Studies toward Aryl-(4-aryl-4<i>H</i>-[1,2,4]triazole-3-yl)-amine from 1,3-Diarylthiourea as Urea Mimetics
作者:Amarnath Natarajan、Yuhong Guo、Haribabu Arthanari、Gerhard Wagner、Jose A. Halperin、Michael Chorev
DOI:10.1021/jo0508189
日期:2005.8.1
4]triazole-3-yl-amines as urea mimetics from the corresponding 1,3-disubstituted thioureas has been studied, and the scope and limitations of this reaction are presented. The reaction proceeds through the formation of a carbodiimide, followed by a sequential addition−dehydration with acyl hydrazides. 1,3-Branched dialkylthioureas result in the formation of the corresponding ureas. The electronic and steric
研究了由巯基助剂从相应的1,3-二取代的硫脲中合成尿素模拟物的二取代的4 H- [1,2,4]三唑-3-基-胺类化合物,并提出了该反应的范围和局限性。该反应通过碳二亚胺的形成而进行,然后依次进行酰基酰肼的加成-脱水。1,3-支链的二烷基硫脲导致形成相应的脲。取代对1,3-二芳基硫脲的苯环的电子和空间作用在中间碳二亚胺的形成以及随后的N-酰基酰肼加合物的闭环方向上起重要作用。