[(1S)-1-(chloromethyl)-3-[5-[2-(dimethylamino)ethoxy]-1-benzofuran-2-carbonyl]-1,2-dihydrobenzo[e]indol-5-yl] (4-nitrophenyl) carbonate 、 [4-[[(2S)-5-(carbamoylamino)-2-[[(2S)-2-[2-[4-(2,5-dioxopyrrol-1-yl)butanoylamino]ethylamino]-3-methylbutanoyl]amino]pentanoyl]amino]phenyl]methyl N-methyl-N-[2-(methylamino)ethyl]carbamate 在
N,N-二异丙基乙胺 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
以45%的产率得到[(1S)-1-(chloromethyl)-3-[5-[2-(dimethylamino)ethoxy]-1-benzofuran-2-carbonyl]-1,2-dihydrobenzo[e]indol-5-yl] N-[2-[[4-[[(2S)-5-(carbamoylamino)-2-[[(2S)-2-[2-[4-(2,5-dioxopyrrol-1-yl)butanoylamino]ethylamino]-3-methylbutanoyl]amino]pentanoyl]amino]phenyl]methoxycarbonyl-methylamino]ethyl]-N-methylcarbamate