反应详情

Part B. To a mixture of 3-carbamimidoyl-benzoic acid tert-butyl ester (220.2 mg, 0.94 mmol), 3-dimethylamino-1-(4-fluoro-phenyl)-propenone (182.6 mg, 0.95 mmol) and sodium hydride (39.2 mg, 1.63 mmol, 60% in hexanes) is added dry ethanol (5.0 mL). The resulting mixture is stirred at refluxing for 8 h until complete consumption of the starting material as determined by TLC. The solvent is removed, and the residue is added to 1N HCl (15 mL) to precipitate a yellow solid. The title product (137.8 mg, 41.3% yield) is produced after washing with water, then ethyl ether in sequence, m.p. 239-241° C. 1H NMR (300 MHz, DMSO-d6): δ 9.05 (1H, s), 8.97 (1H, d, J=5.0 Hz), 8.73 (1H, dd, J=7.7, 1.2 Hz), 8.38 (2H, m), 8.11 (1H, dd, J=8.0, 1.2 Hz), 8.04 (1H, d, J=5.3 Hz), 7.68 (1H, t, J=7.8 Hz), 7.43 (2H, m). MS (ES+): m/e 295.27.

1. temperatureat refluxing for 8 h until complete consumption of the starting material
2. customThe solvent is removed
3. additionthe residue is added to 1N HCl (15 mL)
4. customto precipitate a yellow solid