反应详情

温度

50 °C

A solution of tert-butyl 4-[(6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl)methyl]piperazine-1-carboxylate (0.050 g, 0.14 mmol) obtained in Example A16, Step 1 in methanol (2.0 mL) was added with 7-benzyloxy-1H-indole-3-carboxaldehyde (0.035 g, 0.14 mmol). Then, the mixture was added with 5 drops of piperidine, and the mixture was stirred at 50° C. for 2 hours. The reaction mixture was cooled to room temperature, and then the solid was collected by filtration, and washed with a mixed solvent of chloroform and methanol to obtain tert-butyl (Z)-4-[(2-{[7-(benzyloxy)-1H-indol-3-yl]methylene}-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl)methyl]piperazine-1-carboxylate (0.049 g, 61%).

1. temperatureThe reaction mixture was cooled to room temperature
2. filtrationthe solid was collected by filtration
3. washwashed with a mixed solvent of chloroform and methanol