(2S,3R)-2-(3,4-dimethoxybenzoyl)-3-[(R)-(methoxymethoxy)(3,4-methylenedioxyphenyl)methyl]tetramethylene dipivaloate 在
盐酸 作用下,
以
四氢呋喃 为溶剂,
反应 18.0h,
以40%的产率得到(2S,3R,4S)-4-(3,4-dimethoxybenzoyl)-2-(3,4-methylenedioxyphenyl)-3-(pivaloyloxymethyl)tetrahydrofuran [(7S,8R,8'S)-3',4'-dimethoxy-3,4-methylenedioxy-7'-oxo-7,9'-epoxylignan-9-ylpivaloate]