Chiral α-Amino Phosphonates via Rhodium-Catalyzed Asymmetric 1,4-Addition Reactions
作者:Nicolas Lefevre、Jean-Louis Brayer、Benoît Folléas、Sylvain Darses
DOI:10.1021/ol402059w
日期:2013.8.16
A new approach for the preparation of enantioenriched α-amino phosphonates and derivatives is described. Indeed, the rhodium-catalyzed asymmetric 1,4-addition of potassium organotrifluoroborates to dehydroaminophosphonates afforded α-amino phosphonates in good yields and high enantioselectivities (up to 96%) using Difluorphos as a chiral ligand.
描述了一种制备对映体富集的α-氨基膦酸酯和衍生物的新方法。实际上,使用二氟膦作为手性配体,铑催化的有机三氟硼酸钾不对称的1,4-加成到脱氢氨基膦酸酯上,以高收率和高对映选择性(高达96%)提供了α-氨基膦酸酯。