New chiral ferrocene/indole-based diphosphine ligands for Rh-catalyzed asymmetric hydrogenation of functionalized olefins
作者:Zaheer Abbas、Xin-Hu Hu、Aijaz Ali、You-Wei Xu、Xiang-Ping Hu
DOI:10.1016/j.tetlet.2020.151860
日期:2020.5
Convenient synthesis of a new family of chiral ferrocene/indole-based diphosphine ligands, (Rc,Rp)-IndoFerroPhos (L), from (Sc,Rp)-PPFA and 2-(diphenylphosphino)indole has been described. These new ligands exhibited high efficiency in the Rh-catalyzed asymmetric hydrogenation of functionalized olefins including α-dehydroamino acid esters, α-enamides and dimethyl itaconate, in which up to >99% yield
已经描述了从(S c,R p)-PPFA和2-(二苯基膦基)吲哚方便地合成新的手性二茂铁/吲哚基二膦配体家族(R c,R p)-IndoFerroPhos(L)。这些新的配体在Rh催化的功能化烯烃(包括α-脱氢氨基酸酯,α-烯酰胺和衣康酸二甲酯)的Rh催化不对称氢化中表现出很高的效率,其中产率高达99%以上,ee达到98%。