2-Fluorobenzoyl chloride → N-benzyl-2-(2-fluorobenzamido)isonicotinamide

Beteiligte Stoffe

Reaktionsschritte

To a solution of 2-amino-N-benzylisonicotinamide (0.10 g, 0.44 mmol) and 4-dimethylaminopyridine (0.01 g, 0.08 mmol) in pyridine (3.0 mL) was added 2-fluorobenzoyl chloride (0.07 g, 0.44 mmol). The resulting solution was stirred at ambient temperature for 16 hours, diluted with dichloromethane (25 mL), washed with water (2×25 mL) and brine (10 mL). The organic solution was dried over anhydrous sodium sulphate, filtered and concentrated in vacuo. The residue was purified by column chromatography eluting with 45% ethyl acetate in hexanes to give N-benzyl-2-(2-fluorobenzamido)isonicotinamide as a colorless solid (0.07 g, 44%): mp 175-176° C. (hexanes/ethyl acetate); 1H NMR (300 MHz, CDCl3) δ 9.21 (d, J=13.7 Hz, 1H), 8.64 (s, 1H), 8.46-8.42 (m, 1H), 8.12-8.06 (m, 1H), 7.64-7.48 (m, 2H), 7.35-7.16 (m, 7H), 6.68 (s, 1H), 4.65 (d, J=5.7 Hz, 2H); 13C NMR (CDCl3, 75 MHz) δ 165.2, 162.1, 161.9, 158.8, 151.7, 148.8, 144.1, 137.5, 134.5, 134.4, 131.9, 128.8, 127.7, 125.1, 120.7, 118.8, 116.6, 116.3, 111.0, 44.2; MS (ES+) m/z 350.6 (M+1).

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