(9aS)-8-acetyl-1,7-dihydroxy-3-methoxy-9a-methyl-9-oxo-9,9a-dihydrodibenzo[b,d]furan-4-carboxamide 、
methyl 3-formyl-2,4,5-trimethylbenzoate 、
三乙基硅烷 、
三氟乙酸 以
乙腈 为溶剂,
以to give the target compound (0.314 g, yield: 51%) as a yellow solid的产率得到methyl 3-({[({9aS}-8-acetyl-1,7-dihydroxy-3-methoxy-9a-methyl-9-oxo-9,9a-dihydrodibenzo[b,d]furan-4-yl)carbonyl]amino}methyl)-2,4,5-trimethylbenzoate