反应详情

To a solution of 4-(trifluoromethyl)benzoic acid (114 mg, 0.600 mmol) and triethylamine (0.21 mL, 1.51 mmol) in dichloromethane (3 mL), ethyl chlorocarbonate (0.063 mL, 0.659 mmol) was added under stirring and cooling with ice, and the mixture was stirred for 20 minutes. Next, after ethyl 2-ethyl-3-[3-(aminomethyl)-4-methoxyphenyl]propanoate hydrochloride (200 mg, 0.663 mmol) was added, the mixture was stirred for 1 hour under cooling with ice and for 3 hours at room temperature. Dichloromethane (20 mL) was added to the reaction mixture, which was washed with 1 mol/L hydrochloric acid, saturated aqueous solution of sodium hydrogencarbonate and brine, dried over anhydrous sodium sulfate, and then concentrated. The residue was purified by silica gel column chromatography (eluent: n-hexane:ethyl acetate=4:1 v/v) to afford 245 mg (93%) of the title compound as colorless crystals.

1. temperaturecooling with ice
2. stirringthe mixture was stirred for 20 minutes
3. stirringthe mixture was stirred for 1 hour
4. washwas washed with 1 mol/L hydrochloric acid, saturated aqueous solution of sodium hydrogencarbonate and brine
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated
7. customThe residue was purified by silica gel column chromatography (eluent: n-hexane:ethyl acetate=4:1 v/v)