tert-butyl 4-((6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl)methyl)piperazine-1-carboxylate 、
tert-butyl (3-formyl-1H-indole-7-yl)methyl(methyl)carbamate 在
哌啶 silica gel 、
chloroform methanol 作用下,
以
甲醇 为溶剂,
反应 2.0h,
以to obtain tert-butyl (Z)-4-({2-[(7-{[tert-butoxycarbonyl(methyl)amino]methyl}-1H-indol-3-yl)methylene]-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.044 g, 71%)的产率得到tert-butyl (Z)-4-({2-[(7-{[tert-butoxycarbonyl(methyl)-amino]methyl}-1H-indol-3-yl)methylene]-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate