ethyl (1'S,3S,4'R,6'S,7'Z,14'S)-7-chloro-1-hydroxy-14'-[(2-methylpropan-2-yl)oxycarbonylamino]-2',15'-dioxo-5-(trifluoromethyl)spiro[1,2-dihydropyrano[2,3-c]quinoline-3,18'-3,16-diazatricyclo[14.3.0.04,6]nonadec-7-ene]-4'-carboxylate 在
甲基磺酰氯 、
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以61%的产率得到ethyl (1'S,3S,4'R,6'S,7'Z,14'S)-1,7-dichloro-14'-[(2-methylpropan-2-yl)oxycarbonylamino]-2',15'-dioxo-5-(trifluoromethyl)spiro[1,2-dihydropyrano[2,3-c]quinoline-3,18'-3,16-diazatricyclo[14.3.0.04,6]nonadec-7-ene]-4'-carboxylate