Simple, Novel Synthesis for 1-Carbamoyl-l<i>H</i>-benzotriazole and Some of Its Analogs
作者:Christopher John Perry、Keith Holding、Elizabeth Tyrrell
DOI:10.1080/00397910802136698
日期:2008.9.12
o-aminophenylurea is key to this process. A preliminary study of the reactivity of 2a has shown that once in solution in tetrahydrofuran (THF), the 1-carbamoyl isomer equilibrates to give a mixture of both 1- and 2-isomers. If the solvent is ethanol or water, equilibration occurs rapidly compared to the ultimate formation of solvolysis products.
摘要 1-氨基甲酰-1H-苯并三唑(苯并三唑-1-甲酰胺,2a)是一种有效的氨基甲酰氯替代物,它的一系列类似物可以通过两个非常简单的步骤从 1,2-二氨基苯以良好的产率合成。中间体邻氨基苯基脲的简便制备是该过程的关键。对 2a 反应性的初步研究表明,一旦溶解在四氢呋喃 (THF) 中,1-氨基甲酰基异构体就会平衡,生成 1- 和 2- 异构体的混合物。如果溶剂是乙醇或水,与溶剂分解产物的最终形成相比,平衡发生得很快。