dimethyl 4-[(dimethylamino)methylene]-5-oxo-1,2-pyrrolidinedicarboxylate 、 methyl (5-methoxycarbonyl-2-pyrrolidinylidene)ecetate 以
乙醇 、
溶剂黄146 为溶剂,
反应 5.0h,
以83%的产率得到dimethyl 6-(2-methoxycarbonylamino-3-methoxy-3-oxopropyl)-5-oxo-1,2,3,5-tetrahydroindolizine-3,8-dicarboxylate