Synthesis and Enantioselective Hydrogenation of α-Acyloxyacrylates

Abstract

Numerous α-acyloxyacrylates have been prepared by Wittig-Horner reaction of aldehydes and ethyl 2-acyloxy-2-(diethoxyphosphoryl)acetates which were easily obtained from glyoxylic acid hydrate. The formed α-acyloxyacrylates were subsequently hydrogenated enantioselectively using Rh-DIPAMP and Ru-BINAP (ee = 82-98%) to furnish the corresponding α-acyloxycarboxylates.