反应详情

温度

60 °C

A solution of tert-butyl 4-[(5-chloro-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl)methyl]piperazine-1-carboxylate (0.100 g, 0.261 mmol) synthesized in Example B13, Step 2 in methanol (1 mL) was added with 5-bromo-1H-indazole-3-carbaldehyde (0.0587 g, 0.261 mmol) synthesized in Example B10, Step 3, and piperidine (0.00222 g, 0.0261 mmol) at room temperature, and the mixture was stirred at 60° C. for 2 hours. The reaction mixture was cooled to room temperature, then added with methanol (4 mL), and suspended in methanol and thereby washed to obtain tert-butyl (Z)-4-({5-chloro-2-[(5-bromo-1H-indazol-3-yl)methylene]-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.110 g, 71%).

1. temperatureThe reaction mixture was cooled to room temperature
2. washwashed