(3S)-5-[[2-(bromomethyl)cyclobutyl]methyl]-6'-chloro-N,N-bis[(4-methoxyphenyl)methyl]spiro[2,4-dihydro-1,5-benzoxazepine-3,1'-tetralin]-7-sulfonamide 、
methyl 2-(5-hydroxy-3-pyridyl)acetate 在
potassium carbonate 作用下,
以
乙腈 为溶剂,
以51%的产率得到methyl 2-[5-[[(1R,2R)-2-[[(3S)-7-[bis[(4-methoxyphenyl)methyl]sulfamoyl]-6'-chloro-spiro[2,4-dihydro-1,5-benzoxazepine-3,1'-tetralin]-5-yl]methyl]cyclobutyl]methoxy]-3-pyridyl]acetate