A mixture of 4-(pentan-2-yl)benzoic acid (192 mg, 1.0 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (288 mg, 1.5 mmol), 1-hydroxybenzotriazole t (202 mg, 1.5 mmol), triethylamine (0.5 mL) and dichloromethane (15.0 mL) was stirred at 25° C. for half an hour. Then 3-(aminomethyl)-4,6-dimethylpyridin-2-ol (152 mg, 1.0 mmol) was added to the above mixture. The mixture was stirred at 25° C. for 12 hours. The mixture was washed with water (20 ml×2). The organic phase was dried by sodium sulphate. The mixture was filtered. The filtrate was concentrated and the residue was purified by column chromatography (silica gel, dichloromethane/methane=10:1) to give N-((2-hydroxy-4,6-dimethylpyridin-3-yl)methyl)-4-(pentan-2-yl)benzamide as a white solid (100 mg, 40%). LRMS (M+H+) m/z: 326.2. found 326. 1H NMR (300 MHz, d6-DMSO): δ 11.46 (s, 1H), 8.26 (t, J=4.5 Hz, 1H), 7.75 (d, J=8.1 Hz, 2H), 7.23 (m, J=8.1 Hz, 2H), 5.85 (s, 1H), 4.29 (d, J=4.5 Hz, 2H), 2.76-2.69 (m, 1H), 2.17 (s, 3H), 2.11 (s, 3H), 1.54-1.47 (m, 2H), 1.18-1.05 (m, 5H), 0.81 (t, J=14.4 Hz, 3H).
