反应详情

Pivaloyl chloride (1.74 mL, 14.2 mmol) was added dropwise to a solution of [3-(methoxycarbonyl)phenoxy]acetic acid produced in Example (1c) (3.27 g, 15.6 mmol) and triethylamine (1.97 mL, 14.2 mmol) in dichloromethane (40 mL) in a nitrogen atmosphere at 0° C. After one hour, a solution of 4-[(2-methoxypyridin-4-yl)oxy]-N2-methylbenzene-1,2-diamine produced in Example (16d) (3.46 g, 14.2 mmol) and triethylamine (1.97 mL, 14.2 mmol) in dichloromethane (40 mL) was added dropwise at 0° C., and the mixture was stirred at room temperature for two hours. The reaction mixture was concentrated under reduced pressure. Then, the residue was purified by silica gel chromatography (ethyl acetate) to obtain the title compound (4.81 g, 78%) as a pale brown oil.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. customThen, the residue was purified by silica gel chromatography (ethyl acetate)