Ethanol → Benzoic acid, 2,3,4-trifluoro-, ethyl ester

関与物質

反応手順

To a solution of 2,3,4-trifluorobenzoic acid (10.85 g, 61.6 mmol) in dichloromethane (100 mL) is added oxalyl chloride (13.5 mL, 154 mmol) and N,N-dimethylformamide (3 drops). After 45 minutes, the reaction mixture is concentrated under vacuum. The resulting residue is dissolved in dichloromethane (100 mL) and to this solution is added ethanol (18 mL, 310 mmol). After 30 minutes, the reaction mixture is diluted with dichloromethane and washed with saturated NaHCO3, water, and brine. The organic layer is dried over MgSO4, filtered, and the filtrate is concentrated to afford the title compound as an oil (12.23 g). 1H NMR (CDCl3): δ 7.93–7.67 (m, 1H), 7.09–6.96 (m, 1H), 4.39 (q, 2H), 1.40 (t, 3H).

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