(9aS)-8-acetyl-1,7-dihydroxy-3-methoxy-9a-methyl-9-oxo-9,9a-dihydrodibenzo[b,d]furan-4-carboxamide 、
2-difluoromethyl-1-naphthaldehyde 、
三乙基硅烷 、
三氟乙酸 以
乙腈 为溶剂,
以to give the target compound (499 mg, yield: 82%) as a yellow solid的产率得到(9aS)-8-acetyl-N-{ [2-(difluoromethyl)-naphthyl]methyl }-1, 7-dihydroxy-3-methoxy-9a-methyl-9-oxo-9,9a-dihydrodibenzo[b,d]furan-4-carboxamide