PipPhos and MorfPhos: Privileged Monodentate Phosphoramidite Ligands for Rhodium-Catalyzed Asymmetric Hydrogenation
作者:Heiko Bernsmann、Michel van den Berg、Rob Hoen、Adriaan J. Minnaard、Gerlinde Mehler、Manfred T. Reetz、Johannes G. De Vries、Ben L. Feringa
DOI:10.1021/jo048374o
日期:2005.2.1
A library of 20 monodentate phosphoramidite ligands has been prepared and applied in rhodium-catalyzed asymmetric hydrogenation. This resulted in the identification of two ligands, PipPhos and MorfPhos, that afford excellent and in several cases unprecedented enantioselectivities in the hydrogenation of N-acyldehydroamino acid esters, dimethyl itaconate, acyclic N-acylenamides, and cyclic N-acylenamides
已制备了20个单齿亚磷酰胺配体的文库,并将其用于铑催化的不对称氢化中。这导致鉴定出两个配体,PipPhos和MorfPhos,它们在氢化N-酰基脱氢氨基酸酯,衣康酸二甲酯,无环N-酰基酰胺和环状N-酰基酰胺方面提供了极好的对空选择性,在某些情况下还具有前所未有的对映选择性。此外,提出了一种平行对映选择性测定八种酰化胺的方法。