A solution of 4-(pentan-2-yl)benzoic acid (120 mg, 0.66 mmol) in dichloromethane (40 mL) was added N-hydroxybenzotriazole (HOBT) (135 mg, 1.0 mmol), 1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI) (192 mg, 1.0 mmol), triethylamine (135 mg, 1.5 mmol), stirred for 30 minute. Then 3-(aminomethyl)-4,6-dimethylpyridin-2-ol (100 mg, 0.66 mmol) was added and the mixture was stirred at room temperature for 18 hours. The mixture was washed with water (30 mL), dried over anhydrous sodium sulfate, concentrated. The residue was purified by column chromatography (silica gel, dichloromethane/methanol=20:1) and the obtained solution was freeze-dried to afford N-((2-hydroxy-4,6-dimethylpyridin-3-yl)methyl)-4-(pentan-2-yl)benzamide (186 mg, 86.4%) as white solid. LRMS (M+H+) m/z: calcd 326.20. found 326. HPLC Purity (214 nm)95%. 1H NMR (300 MHz, CD3OD): δ 7.72-7.69 (d, J=11 Hz, 2H) 7.29-7.26 (d, J=8.4 Hz, 2H), 6.102 (s, 1H), 4.48 (s, 2H), 2.69-2.62 (m, 1H), 3.36 (s, 3H), 2.24 (s, 3H), 1.66-1.57 (m, 2H), 1.22-1.25 (d, J=9 Hz, 3H), 0.782-0.832 (t, J=7.5 Hz, 3H).
