(2R,3R)-3-(3,4-Dimethoxy-phenyl)-4-[1-(4-methoxy-phenyl)-meth-(E)-ylidene]-5-oxo-tetrahydro-furan-2-carboxylic acid methyl ester 在
sodium tetrahydroborate 作用下,
以
甲醇 为溶剂,
生成
(4R,5R)-4-(3,4-Dimethoxy-phenyl)-5-hydroxymethyl-3-[1-(4-methoxy-phenyl)-meth-(E)-ylidene]-dihydro-furan-2-one