反应详情

A mixture of 4-(1-(pyridin-4-yloxy)ethyl)benzoic acid (127 mg, 0.5 mmol), N-hydroxybenzotriazole (101.25 mg, 0.75 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (144 mg, 0.75 mmol) and triethylamine (151 mg, 1.5 mmol) in dichloromethane (50 mL) was stirred for 30 minutes at room temperature. Then 3-(aminomethyl)-4,6-dimethylpyridin-2-ol (76 mg, 0.5 mmol) was added. The resultant mixture was stirred at room temperature for 12 hours. The mixture was washed with water (10 mL×3). The organic layer was concentrated to give a residue and the residue was purified by column chromatography (silica gel, dichloromethane/methanol=20:1) to give N-((2-hydroxy-4,6-dimethylpyridin-3-yl)methyl)-4-(1-(pyridin-4-yloxy)ethyl)benzamide (57 mg, 30%). LRMS (M+H+) m/z: calcd 377.17. found 377. HPLC purity (214 nm): 99%. 1H NMR (300 MHz, CD3OD): δ 8.23 (d, J=5.1 Hz, 2H), 7.78 (d, J=8.1 Hz, 2H), 7.46 (d, J=8.1 Hz, 2H), 6.93-6.91 (m, 2H), 6.08 (s, 1H), 5.62 (q, J=6.3 Hz, 1H), 4.47 (s, 2H), 2.34 (s, 3H), 2.23 (s, 3H), 1.64 (d, J=6.3 Hz, 3H).

1. washThe mixture was washed with water (10 mL×3)
2. concentrationThe organic layer was concentrated
3. customto give a residue
4. customthe residue was purified by column chromatography (silica gel, dichloromethane/methanol=20:1)