Synthesis of Enantiomerically Enriched Imidazolidin-2-Ones through Asymmetric Palladium-Catalyzed Alkene Carboamination Reactions
作者:Brett A. Hopkins、John P. Wolfe
DOI:10.1002/anie.201205233
日期:2012.9.24
leads to significantly improved enantioselectivities with electron‐poor aryl halide substrates. It is suggested that the CC bond‐forming reductive elimination is the enantiodetermining step in these reactions.
正水效应:由[Pd 2 (dba) 3 ](dba=二亚苄基丙酮)和( S )-Siphos-PE组成的催化剂可有效地将N-烯丙基脲与芳基溴进行对映选择性偶联,得到4-取代咪唑烷- 2个。添加水可显着提高缺电子芳基卤化物底物的对映选择性。表明C → C键形成的还原消除是这些反应中的对映决定步骤。