“Urea to Urea” Approach: Access to Unsymmetrical Ureas Bearing Pyridyl Substituents
作者:Svetlana O. Kasatkina、Kirill K. Geyl、Sergey V. Baykov、Mikhail S. Novikov、Vadim P. Boyarskiy
DOI:10.1002/adsc.202101490
日期:2022.3.30
A protocol for the synthesis of unsymmetrical ureas substituted by pyridyl/quinolinyl moiety has been developed. This method concluded in metal- and base-free reamination of N,N-dimethyl-N‘-hetaryl ureas with a wide range of aryl and alkyl amines. The isolated yields vary from 40 to 96% depending on the nucleophilicity of the amines. The scope of this method includes more than 50 examples. The reaction
已经开发了一种合成被吡啶基/喹啉基部分取代的不对称脲的方案。该方法以N , N -二甲基- N'-杂芳基脲与多种芳基胺和烷基胺的无金属和无碱反应而告终。取决于胺的亲核性,分离的产率从 40% 到 96% 不等。此方法的范围包括 50 多个示例。该反应不受供体或受体基团以及多种功能的阻碍。合成可以很容易地扩展到克数量。由实验数据支持的理论计算使我们能够为该过程提出一个合理的机制。该反应通过异氰酸杂芳酯的中间体形成而发生。