反应详情

A mixture of 6-(adamantan-1-ylmethoxy)-5-cyclopropylnicotinic acid (0.24 g, 0.73 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (0.35 g, 1.83 mmol), 4-dimethylaminopyridine (0.22 g, 1.83 mmol), and 2-methoxyethanesulfonamide (0.13 g, 0.95 mmol) in dichloromethane (10 mL) was stirred at ambient temperature for 3 days. The reaction mixture was diluted with ethyl acetate (50 mL), washed with 1 M aqueous hydrochloric acid solution (2×30 mL), brine (30 mL); dried over anhydrous sodium sulfate; filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography (3:1 hexanes:ethyl acetate (+0.2% acetic acid v/v)) to provide the title compound (0.25 g, 76%): 1H NMR (300 MHz, DMSO-d6) δ 11.97 (br s, 1H), 8.45 (d, J=2.3 Hz, 1H), 7.70 (d, J=2.3 Hz, 1H), 3.93 (s, 2H), 3.75-3.65 (m, 4H), 3.14 (s, 3H), 2.07-1.98 (m, 1H), 1.98-1.91 (m, 3H), 1.73-1.58 (m, 12H) 0.99-0.91 (m, 2H), 0.76-0.70 (m, 2H); MS (ES+) m/z 449.2 (M+1).

1. washwashed with 1 M aqueous hydrochloric acid solution (2×30 mL), brine (30 mL)
2. dry with materialdried over anhydrous sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe residue was purified by silica gel column chromatography (3:1 hexanes