3-(4-溴苯胺基)-5,5-二甲基环己-2-烯-1-酮 、
4,5-dimethoxycarbonyl-1-(4'-methylphenyl)-1H-pyrrole-2,3-dione 以
甲苯 为溶剂,
以76%的产率得到methyl 1-(4-bromophenyl)-4'-hydroxy-6,6-dimethyl-1'-(4-methylphenyl)-2,4,5'-trioxo-1,1',2,4,5,5',6,7-octahydrospiro[indole-3,2'-pyrrole]-3'-carboxylate