ethyl 1-butyl-2-methyl-5-oxo-4,5-dihydro-1H-pyrrole-3-carboxylate 在
哌啶 作用下,
以
乙醇 为溶剂,
反应 2.0h,
生成 ethyl (1'R*,2'R*,3S*,7a'S)-1''-butyl-5''-methyl-2,2''-dioxo-1'-phenyl-1'',2'',5',6',7',7a'-hexahydro-1'H-dispiro[indoline-3,3'-pyrrolizine-2',3''-pyrrole]-4''-carboxylate