反应详情

The title compound was synthesized according to the method described in WO 2008/073956 A2. A solution of methanesulfonyl chloride (3.4 mL, 44 mmol) in anhydrous methylene chloride (40 mL) was added dropwise to a stirring solution of 2-aminobenzylalcohol (5 g, 40.6 mmol) and anhydrous pyridine (16 mL, 203 mmol) in anhydrous methylene chloride (80 mL). The resulting mixture was stirred at room temperature for 24 hours and concentrated to ⅓ volume and diluted with ethyl acetate. The organic solution was successively washed twice with 1N aqueous hydrochloric acid, water, saturated aqueous sodium bicarbonate, and saturated aqueous sodium chloride solutions, dried (anhydrous sodium sulfate), filtered, and concentrated. The crude residue was passed through a pad of silica gel, washing with ethyl acetate/hexanes to give a yellow oil (6.1 g, 75%). 1H NMR (CDCl3, 300 MHz) δ 7.84 (br s, 1H), 7.53 (d, 1H, J=8.1 Hz), 7.36-7.30 (dt, 1H, J=1.5, 7.8 Hz), 7.25-7.21 (dd, 1H, J=1.5, 7.8 Hz), 7.16-7.11 (dt, 1H, J=1.2, 7.5 Hz), 4.77-4.75 (d, 2H, J=5.1 Hz), 3.04 (s, 3H), 2.60 (t, 1H, J=5.2 Hz).

1. concentrationconcentrated
2. additiondiluted with ethyl acetate
3. washThe organic solution was successively washed twice with 1N aqueous hydrochloric acid, water, saturated aqueous sodium bicarbonate, and saturated aqueous sodium chloride solutions
4. dry with materialdried (anhydrous sodium sulfate)
5. filtrationfiltered
6. concentrationconcentrated
7. washwashing with ethyl acetate/hexanes