1,3,3-trimethyl-6,7-dimethoxy-3,4-dihydroisoquinoline 、
methyl 3-(4-nitrobenzoyl)-4,5-dioxo-1-phenylpyrrole-2-carboxylate 以
苯 为溶剂,
以58%的产率得到5,5-dimethyl-8,9-dimethoxy-3-oxo-2,3,5,6-tetrahydropyrrolo[2,1-a]isoquinoline-2-spiro-2'-(4-hydroxy-3-(p-nitrobenzoyl)-5-oxo-1-phenyl-2,5-dihydro-1H-pyrrole)