methyl 4,6-O-(R)-benzylidene-2-O-methyl-α-D-ribohexopyranosid-3-ulose 、
甲基锂 以
乙醚 为溶剂,
生成 (2R,4aR,6S,7R,8S,8aS)-6,7-Dimethoxy-8-methyl-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxine 、
(2R,4aR,6S,7R,8R,8aS)-6,7-Dimethoxy-8-methyl-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxine