Enantioselective copper-mediated allylic substitution with Grignard reagents was achieved employing the ortho-diphenylphosphanylferrocene carboxylate (o-DPPF) system as a planar chiral reagent-directing leaving group. Careful optimization of reaction parameters resulted in excellent regioselectivities and enantioselectivies of up to 95% ee.
利用邻
二苯基膦酰
二茂铁羧酸酯(邻
DPPF)体系作为平面手性试剂导向离去基团,实现了
铜介导的烯丙基取代
格氏试剂的对映体选择性。通过对反应参数的精心优化,获得了极佳的区域选择性和高达 95% ee 的对映选择性。