Air- and Water-Stable Catalysts for Hydroamination/Cyclization. Synthesis and Application of CCC−NHC Pincer Complexes of Rh and Ir
摘要:
The scope of CCC-NHC pincer complex synthetic methodology by metalation/transmetalation has been extended to Ir. Structural characterization revealed that it is isomorphous with the Rh complex. Both Rh and Ir complexes are efficient catalysts for the hydroamination/cyclization of secondary amines in the presence of air and/or water.
Design, scope and mechanism of highly active and selective chiral NHC–iridium catalysts for the intramolecular hydroamination of a variety of unactivated aminoalkenes
Chiral, cationic NHC–iridium complexes are introduced as catalysts for the intramolecular hydroamination reaction of unactivated aminoalkenes. The catalysts show high activity in the construction of a range of 5- and 6-membered N-heterocycles, which are accessed in excellent optical purity, with various functional groups being tolerated with this system. A major deactivation pathway is presented and
引入手性阳离子 NHC-铱配合物作为未活化氨基烯烃分子内氢胺化反应的催化剂。该催化剂在构建一系列 5 元和 6 元 N 杂环时表现出高活性,这些杂环具有优异的光学纯度,并且该系统可以耐受各种官能团。通过使用替代反应条件呈现和消除主要的失活途径。对反应机理进行了详细的实验和计算研究,为催化系统的作用模式提供了有价值的见解,并指出了对该催化平台的未来修改。