氯甲酸乙酯 、 4-methoxy-9-oxido-5,13-bis(phenylmethoxy)-9-azoniatetracyclo[7.7.1.02,7.011,16]heptadeca-2,4,6,11(16),12,14-hexaene 在
potassium tert-butylate 、
sodium carbonate 作用下,
生成 ethyl 4-(2-formyl-4-phenylmethoxyphenyl)-6-methoxy-7-phenylmethoxy-3,4-dihydro-1H-isoquinoline-2-carboxylate 、
ethyl 4-(2-formyl-5-methoxy-4-phenylmethoxyphenyl)-7-phenylmethoxy-3,4-dihydro-1H-isoquinoline-2-carboxylate