(9aS)-8-acetyl-1,7-dihydroxy-3-methoxy-9a-methyl-9-oxo-9,9a-dihydrodibenzo[b,d]furan-4-carboxamide 、
4-formyl-2-naphthyl dimethylcarbamate 、
三乙基硅烷 、
三氟乙酸 以
乙腈 为溶剂,
以to give the target compound (402 mg, yield: 69%) as a yellow solid的产率得到4-[({[(9aS)-8-acetyl-1,7-dihydroxy-3-methoxy-9a-methyl-9-oxo-9,9a-dihydrodibenzo [b,d]furan-4-yl]carbonyl}amino)methyl]-2-naphthyl dimethylcarbamate