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.
通过醛和 2-乙酰氧基-2-(二乙氧基
磷酰)
乙酸乙酯的 Wittig-Horner 反应,制备了大量的δ-乙酰氧基
丙烯酸酯,这些
乙酸乙酯很容易从
乙醛酸水合物中获得。随后使用 Rh-
DIPAMP 和 Ru-BINAP(ee = 82-98%)对形成的δ-乙酰氧基
丙烯酸酯进行对映选择性氢化,生成相应的δ-乙酰氧基
羧酸酯。