反应详情

A solution of the compound (2.00 g, 7.32 mmol) obtained in Example 14-4) and the compound (2.57 g, 8.06 mmol) obtained in Example 4-1) in n-butanol (40 mL) was stirred at 140° C. for 8 h. The reaction mixture was cooled to room temperature and concentrated under reduced pressure. The residue was purified by silica gel chromatography (ethyl acetate) to obtain the title compound (3.86 g, quant.) as a yellow solid.

1. concentrationconcentrated under reduced pressure
2. customThe residue was purified by silica gel chromatography (ethyl acetate)