Enantioselective phospha-Michael reaction of diethyl phosphonate with exocyclic α,β-unsaturated benzocyclic ketones catalyzed by a dinuclear zinc−AzePhenol catalyst
作者:Na Shao、Yong-Yang Luo、Hui-Jie Lu、Yuan-Zhao Hua、Min-Can Wang
DOI:10.1016/j.tet.2018.03.016
日期:2018.4
The dinuclear zinc complexes as high performance catalysts were used to catalyze phospha-Michael reaction of exocyclic α,β-unsaturated benzocyclic ketones under mild conditions, and the desired products possessing 1-indanones or 1-tetralones skeleton were obtained with excellent enantioselectivities of up to 99%/99% ee and yields of up to 99%. The absolute stereochemistry of the major products catalyzed
用双核锌配合物作为高性能催化剂,在温和条件下催化环外α,β-不饱和苯并环酮的磷-迈克尔反应,得到所需的具有1-茚满酮或1-四酮骨架的产物,其对映体选择性最高可达ee为99%/ 99%,产率高达99%。通过催化主要产物的绝对立体化学(R,R) - L1被确定为在(R,R),通过X射线结晶学分析-构型的3d。观察到正非线性效应,并提出了可能的机理。