5-[2-(N,N-dimethylamino)ethoxy]benzofuran-2-carboxylic acid 、
(S)-8-Chloromethyl-4-hydroxy-2-methyl-3,6,7,8-tetrahydro-pyrrolo[3,2-e]indole-1-carboxylic acid methyl ester 在
1-(3-二甲基氨基丙基)-3-乙基碳二亚胺 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 2.0h,
以85%的产率得到methyl (8S)-8-(chloromethyl)-6-[5-[2-(dimethylamino)ethoxy]-1-benzofuran-2-carbonyl]-4-hydroxy-2-methyl-7,8-dihydro-3H-pyrrolo[3,2-e]indole-1-carboxylate