Enantioselective Synthesis of Multisubstituted Spirocyclopentane Oxindoles Enabled by Pd/Chiral Rh(III) Complex Synergistic Catalysis
作者:Qian Wan、Liang Chen、Shiwu Li、Qiang Kang、Yaofeng Yuan、Yu Du
DOI:10.1021/acs.orglett.0c03588
日期:2020.12.18
2]-cycloaddition reaction of α,β-unsaturated 2-acyl imidazoles with spirovinylcyclopropanyl-2-oxindoles catalyzed synergistically by an achiral palladium(0) catalyst and a chiral-at-metal rhodium(III) complex has been developed. A series of biologically important 3-spirocyclopentane-2-oxindoles with four contiguous stereocenters were synthesized in high yields (up to 99%) with excellent stereoselectivities
α,β-不饱和2-酰基咪唑与螺乙烯基环丙烷基-2-氧吲哚的非对称[3 + 2]-环加成反应已通过非手性钯(0)催化剂和手性金属铑(III)配合物协同催化发达。具有高产率(高达99%)和优异的立体选择性(高达99%ee,20:1 dr)的高收率合成了一系列生物学上重要的具有四个连续立体中心的3-spirocyclopentane-2-oxindoles。