(5R,6R,7R,8R)-5-(4-Benzyloxycarbonyloxy-3,5-dimethoxy-phenyl)-8-hydroxy-7-hydroxymethyl-5,6,7,8-tetrahydro-naphtho[2,3-d][1,3]dioxole-6-carboxylic acid ethyl ester 在
palladium on activated charcoal
氢气 作用下,
以
乙酸乙酯 为溶剂,
以70%的产率得到(5R,6R,7R,8R)-8-Hydroxy-5-(4-hydroxy-3,5-dimethoxy-phenyl)-7-hydroxymethyl-5,6,7,8-tetrahydro-naphtho[2,3-d][1,3]dioxole-6-carboxylic acid ethyl ester