(3S)-3-(3-Aminocrotonyloxy)-1-benzyl-pyrrolidine-2,5-dione 、 2-methoxyethyl 2-acetyl-3-(2-chloro-3-cyano-phenyl)-2-propenoate 以
乙酸乙酯 、
异丙醇 为溶剂,
以57.8 g (41%)的产率得到(4R,3'S)-(1-Benzyl-pyrrolidine-2,5-dion-3-yl)-(2-methoxyethyl)-4-(2-chloro-3-cyanophenyl)-1,4-dihydro-2,6-dimethyl-pyridine-3,5-dicarboxylate