Rhodium-Catalyzed Asymmetric Addition of Organoboronic Acids to Aldimines Using Chiral Spiro Monophosphite-Olefin Ligands: Method Development and Mechanistic Studies
作者:Huanyu Shan、Qiaoxia Zhou、Jinglu Yu、Shuoqing Zhang、Xin Hong、Xufeng Lin
DOI:10.1021/acs.joc.8b01764
日期:2018.10.5
on a hexamethyl-1,1′-spirobiindane scaffold was accomplished starting from Bisphenol C. The optimal ligand could serve as an elegant chiral bidentate ligand in the Rh-catalyzed asymmetric 1,2-addition of organoboronic acids to various acyclic/cyclic aldimines, leading to chiral amines with high yields and excellent enantioselectivities. Detailed stereochemical models for enantioselective induction
从双酚C开始合成基于六甲基-1,1'-螺双茚满骨架的新型手性螺一亚磷酸酯-烯烃(SMPO)配体。最佳配体可作为Rh-中的优雅手性双齿配体催化有机硼酸向各种无环/环状醛亚胺的不对称1,2-加成反应,从而获得具有高收率和优异对映选择性的手性胺。通过DFT计算阐明了对映选择性诱导的详细立体化学模型,并假定了亚磷酸酯-烯烃配体具有较高对映选择性的起源。