Naturally catalytic: The cinchonidine‐ and cinchonine‐derived bifunctional thiourea organocatalysts 1 a and 1 g (see picture) have been applied in the asymmetrichydrophosphonylation of aromatic and heteroaromatic α‐ketoesters for the first time, obtaining S and R products in high yields with good to excellent enantioselectivities (up to 91 % ee).
Enantioselective Construction of Tertiary C(sp3)−P Bonds by Thiourea‐based Bifunctional Phosphonium Salt‐catalyzed Hydrophosphonylation of Ketone Compounds
作者:Zhenghuai Feng、Hongkui Zhang、Xiaoyu Ren、Chunhui Jiang、Guowei Gao、Tianli Wang
DOI:10.1002/cctc.202100799
日期:2021.9.7
quaternary α-hydroxyphosphonate molecules is herein described by thiourea-derived bifunctional phosphonium salt catalysis. This new synthetic protocol has an excellent functional group tolerance, and particularly both aromatic, heteroaromatic and aliphatic α-ketoesters and 1,2-diketones were readily transferred into phosphonate products in high yields (up to 99 %) with excellent enantioselectivities (up