Chiral-at-Metal Rh(III) Complex Catalyzed Asymmetric Conjugate Addition of Unactivated Alkenes with α,β-Unsaturated 2-Acyl Imidazoles
作者:Kuan Li、Qian Wan、Qiang Kang
DOI:10.1021/acs.orglett.7b01456
日期:2017.6.16
A newly prepared chiral-at-metal Rh(III) complex catalyzed highly efficient asymmetric conjugate addition of para-vinylanilines with α,β-unsaturated 2-acyl imidazoles is developed, affording the corresponding adducts in 67–95% yields with 86–95% ee. Remarkably, employing as low as 0.05 mol % of Rh(III) complex as catalyst, a gram-scale reaction still affords the desired product in 81% yield with 92%
开发了一种新制备的手性金属Rh(III)配合物,可高效催化对乙烯基苯胺与α,β-不饱和2-酰基咪唑的不对称共轭加成反应,以67-95%的收率得到相应的加合物,收率为86-95。 %ee。显着地,使用低至0.05mol%的Rh(III)络合物作为催化剂,克规模的反应仍以81%的收率和92%的ee提供期望的产物。