Triethylamine → N-(3-chloro-4-fluorophenyl)propanamide

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Reaction Steps

3-chloro-4-fluoroaniline (10 g, 67.32 mmol) dissolved in CH2Cl2 was added with propionyl chloride (6.6 mL, 74.10 mmol) and triethyl amine (10.2 mL, 73.58 mmol) dropwise under water bath, and the mixture was stirred for 2 h. The resulting solution was washed with water (2×50 mL) and saturated aqueous NaHCO3 solution (12 mL). The CH2Cl2 layer dried over MgSO4 was evaporated to give title compound as light purple solid (13.01 g, 96.3%). 1H NMR (400 MHz, DMSO-d6) δ 1.06 (t, J=7.6 Hz, 3H), 2.30 (q, J=7.6 Hz, 2H), 7.31 (dd, J=9.2 and 8.8 Hz, 1H), 7.44 (ddd, J=8.8 and 4 and 2.8 Hz, 1H), 7.91 (dd, J=7.2 and 2.8 Hz, 1H), 10.04 (br s, 1H); 13C NMR (100 MHz, DMSO-d6) δ 9.4, 29.4, 116.6, 116.8, 118.8, 119.0, 119.1, 120.2, 136.55, 136.58, 151.5, 153.9, 172.1;

Provenance & Evidence