(3R,4R,5S)-diethyl 5-[2-(2-benzyloxyethyl)-4,5-dimethoxyphenyl]-4-formyl-3-methylpyrrolidine-2,2-dicarboxylate 在
甲醇 、 sodium tetrahydroborate 作用下,
以62%的产率得到(3R,4R,5S)-diethyl 5-[2-(2-benzyloxyethyl)-4,5-dimethoxyphenyl]-4-hydroxymethyl-3-methylpyrrolidine-2,2-dicarboxylate