反应详情

A suspension of 4-(3-carbamoyl-6-chloropyridin-2-ylamino)benzoic acid (700 mg, 2.400 mmol), 1-methylpiperazine (288 mg, 2.88 mmol), HOBT (441 mg, 2.88 mmol), and EDC (552 mg, 2.88 mmol) in DMF (4 mL) was stirred at rt for 2 h. The reaction mixture was diluted with water and the resulting precipitate filtered and purified by MPLC chromatography (ISCO, solid loaded on CELITE®, 10% NH4OH/MeOH/CH2Cl2, 40 g silica gel column) to give 175 mg of 6-chloro-2-(4-(4-methylpiperazine-1-carbonyl)phenylamino)nicotinamide. LCMS: (M+H)+=374.05, 376.07 (Cl pattern); 1H NMR (400 MHz, CDCl3) δ ppm 10.74 (1H, s), 7.64 (3H, dd, J=8.13, 5.49 Hz), 7.21 (2H, d, J=8.79 Hz), 6.67 (1H, d, J=7.91 Hz), 3.38-3.97 (4 H, m), 2.34-2.59 (4H, m), 2.33 (3H, s), 1.70 (2H, s).

1. filtrationthe resulting precipitate filtered
2. custompurified by MPLC chromatography (ISCO, solid loaded on CELITE®, 10% NH4OH/MeOH/CH2Cl2, 40 g silica gel column)