dimethyl 5-hydroxy-1,2-diphenyl-3-(p-tolyl)pyrrolidine-2,5-dicarboxylate 在
柠檬酸 作用下,
以
甲苯 为溶剂,
生成 (2R*,3R*)-dimethyl 2,3-dihydro-1,2-diphenyl-3-p-tolyl-1H-pyrrole-2,5-dicarboxylate 、 (2S*,3R*)-dimethyl 2,3-dihydro-1,2-diphenyl-3-p-tolyl-1H-pyrrole-2,5-dicarboxylate