4,8-Disubstituted Bicyclo[3.3.1]nona-2,6-dienes as Chiral Ligands for Rh-Catalyzed Asymmetric 1,4-Addition Reactions
作者:Renaldas Rimkus、Marius Jurgelėnas、Sigitas Stončius
DOI:10.1002/ejoc.201500202
日期:2015.5
C2-symmetric chiral diene ligands based on 4,8-endo,endo-disubstituted bicyclo[3.3.1]nona-2,6-diene framework have been designed and synthesized. The rhodium complexes of the dienes, which were obtained in a few straightforward steps from enantiomerically pure bicyclo[3.3.1]nonane-2,6-dione, exhibited excellent catalytic activity and high enantioselectivity (up to 96 % ee) in the conjugate addition
设计并合成了基于 4,8-endo,endo-di 取代双环 [3.3.1]nona-2,6-diene 骨架的 C2 对称手性二烯配体。二烯的铑配合物是从对映体纯的双环[3.3.1]壬烷-2,6-二酮通过几个简单的步骤获得的,在共轭加成中表现出优异的催化活性和高对映选择性(高达 96% ee)芳基硼酸在温和的反应条件下以高原子效率反应成环烯酮。