2,2,2-Trifluroenthanol promoted synthesis of unsymmetrical ureas from dioxazolones and amines via tandem lossen rearrangement/condensation process
作者:Jian Li、Wang He、Pan Lei、Jiacheng Song、Jiyou Huo、Hongbo Wei、Hongjin Bai、Weiqing Xie
DOI:10.1080/00397911.2021.1983605
日期:2021.12.2
(TFE) promoted synthesis of unsymmetric ureas was described. This approach enabled the construction of a variety of ureas from the readily prepared and easy-to-handle dioxazolones and amines via tandem Lossen rearrangement/condensation process. The reaction featured mild conditions for the urea synthesis under metal-free conditions, which was successively applied in the scale-up synthesis of herbicides
摘要 描述了 2,2,2-三氟乙醇 (TFE) 促进不对称尿素的合成。这种方法能够通过串联洛森重排/缩合过程从易于制备且易于处理的二恶唑酮和胺中构建各种尿素。该反应具有在无金属条件下合成尿素的温和条件,该反应先后应用于除草剂Monuro和Isoproturon的放大合成。