Enantioselective Rhodium-Catalyzed Synthesis of Branched Allylic Amines by Intermolecular Hydroamination of Terminal Allenes
作者:Michael L. Cooke、Kun Xu、Bernhard Breit
DOI:10.1002/anie.201206594
日期:2012.10.22
Branching out: The rhodium‐catalyzed enantioselective hydroamination of monosubstituted allenes with anilines permits the atom‐economic synthesis of valuable branched allylic amines. In contrast to previous linear selective allene hydroaminations, a RhI/Josiphos catalyst system (see scheme; cod=1,5‐cyclooctadiene, DCE=1,2‐dichloroethane) allows branched allylic amines to be obtained with perfect regioselectivity
分支:苯胺对铑取代的单取代烯的对映选择性氢化胺化反应可实现原子经济的有价值的支链烯丙基胺的合成。与以前的线性选择性丙二烯加氢胺化反应相比,Rh I / Josiphos催化剂体系(参见方案; cod = 1,5-环辛二烯,DCE = 1,2-二氯乙烷)可以以理想的区域选择性,高收率获得支链烯丙基胺。和良好的对映选择性。