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. β-lactams featuring two contiguous stereocenters at Cβ and the β substituent can
已经开发了在
铜催化下各种烷基与未活化的内烯烃的对映选择性加成反应。该反应使用酰胺连接的
氨基
喹啉作为导向基团,4-烷基汉茨酯作为烷基的供体,很少使用联芳基二氧化膦作为手性
配体。β-内酰胺在 Cβ 和 β 取代基上具有两个连续的立体中心,可以以良好的收率和优异的对映选择性获得。机理研究表明,烷基自由基与 CuII 配位烯烃的亲核加成是对映体决定步骤。