反应详情

2-Chloro-6-(cyanomethyl)benzonitrile (3.12 g, 17.7 mmol) was added to a solution of HBr in acetic acid (20 mL) and stirred at room temperature overnight. The reaction mixture was added drop wise to a saturated solution of NaHCO3. The resulting precipitate was collected by filtration to give a yellow solid, which was stirred in dichloromethane (100 mL). Triethylamine (3.7 mL, 26.5 mmol) and acetyl chloride (1.9 mL, 26.7 mmol) were added and the reaction mixture was stirred overnight at room temperature. Solvents were evaporated and residue was triturated with water, then ether, to the title compound as a pale yellow solid (2.67 g, 8.91 mmol, 51%). 1H NMR (d6-DMSO, 400 MHz) δ 8.47 (s, 1H), 8.00 (dd, 1H, J=8.6, 1.3 Hz), 7.74-7.72 (m, 1H), 7.67-7.64 (m, 1H), 2.14 (s, 3H). LC-MS (1) Rt=2.05 min; m/z (ESI+) 299 (MH+).

1. filtrationThe resulting precipitate was collected by filtration
2. customto give a yellow solid, which
3. stirringthe reaction mixture was stirred overnight at room temperature
4. customSolvents were evaporated
5. customresidue was triturated with water