methyl 4,6-O-(R)-benzylidene-2-deoxy-α-D-erythrohexopyranosid-3-ulose 、
2-溴丙酸乙酯 在
二甲醇缩甲醛 、
锌 作用下,
生成 (S)-2-((2R,4aR,8S,8aR)-8-Hydroxy-2-phenyl-4,4a,8,8a-tetrahydro-pyrano[3,2-d][1,3]dioxin-8-yl)-propionic acid ethyl ester 、 (R)-2-((2R,4aR,8S,8aR)-8-Hydroxy-2-phenyl-4,4a,8,8a-tetrahydro-pyrano[3,2-d][1,3]dioxin-8-yl)-propionic acid ethyl ester 、
(R)-2-((2R,4aR,6S,8S,8aR)-8-Hydroxy-6-methoxy-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-8-yl)-propionic acid ethyl ester 、
methyl 4,6-O-benzylidene-2-deoxy-3-C-<(R)-1'-(ethoxycarbonyl)ethyl>-α-D-ribo-hexopyranoside