期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 143, 期 2, 页码 1195-1202出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c12333
关键词
-
资金
- China Postdoctoral Science Foundation [NSFC-21421062, NSFC-21901127]
- [2018M640225]
- [2019T120179]
An enantioselective addition reaction of various alkyl groups to unactivated internal alkenes under Cu catalysis has been developed, leading to high yields of β-lactams featuring two contiguous stereocenters with excellent enantioselectivity. Mechanistic studies suggest that a nucleophilic addition of the alkyl radical to Cu-II-coordinated alkene is the enantio-determining step.
An enantioselective addition reaction of various alkyl groups to unactivated internal alkenes under Cu catalysis has been developed. The reaction uses amide-linked aminoquinoline as the directing group, 4-alkyl Hantzsch esters as the donor of alkyl radicals, and rarely used biaryl diphosphine oxide as a chiral ligand beta-lactams featuring two contiguous stereocenters at C beta and the beta substituent can be obtained in good yield with excellent enantioselectivity. Mechanistic studies indicate that a nucleophilic addition of the alkyl radical to Cu-II-coordinated alkene is the enantio-determining step.
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