反应详情

温度

60 °C

A solution of tert-butyl 4-[4-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)butyl]piperidine-1-carboxylate (0.0483 g, 0.119 mmol) in methanol (5 mL) was added with 1H-indazole-3-carboxaldehyde (0.0174 g, 0.119 mmol) and piperidine (5 drops), and the mixture was stirred at 60° C. for 2 hours. The reaction mixture was concentrated, and the resulting residue was subjected to silica gel column chromatography (hexane/ethyl acetate), and the resulting crude product was purified again by silica gel column chromatography (chloroform/methanol) to obtain tert-butyl (Z)-4-(4-{2-[(1H-indazol-3-yl)methylene]-6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl}butyl)piperidine-1-carboxylate (0.0454 g, 72%).

1. concentrationThe reaction mixture was concentrated
2. customthe resulting crude product was purified again by silica gel column chromatography (chloroform/methanol)