1,3,3-trimethyl-6,7-dimethoxy-3,4-dihydroisoquinoline 、
3-(4-Methoxy-benzoyl)-benzo[b]pyrrolo[1,2-d][1,4]oxazine-1,2,4-trione 以
苯 为溶剂,
以93%的产率得到4-hydroxy-1-(2-hydroxyphenyl)-8',9'-dimethoxy-3-(4-methoxybenzoyl)-5',5'-dimethyl-5',6'-dihydro-1H-spiro[pyrrole-2,2'-pyrrolo[2,1-a]isoquinoline]-3',5-dione