反应详情

To a stirred solution of 1-(3-amino-4-benzyloxy-phenyl)-ethanone (EP 0 659 737) (16.98 g, 70.0 mmol) in pyridine (50 mL) was added dropwise benzenesulfonyl chloride (13.09 g, 73.5 mmol) in 100 mL of pyridine at room temperature. The reaction was stirred for 18 hours under nitrogen atmosphere. The mixture was diluted with CH2Cl2 (700 mL) and washed with 1N hydrochloric acid, water, dried over Na2SO4, and concentrated. The product was purified by flash silica gel chromatography eluting with CH2Cl2 to give the title compound as a tan solid (12.55 g, 47%); 1H NMR (300 MHz, DMSO-d6) δ 3.33(s, 3 H), 5.03(s, 2 H), 7.02(d, J=8.7 Hz, 1 H), 7.35(m, 3 H), 7.44(t, J=15 Hz, 2 H), 7.58(m, 1 H), 7.50 (m, 3 H), 7.81(d, 1 H), 9.83(s, 1 H); MS (ES) m/z: 381.9 (MH+, 100%); HRMS Calcd. for C21H19NO4S(MH+): 382.1107. Found: 382.1100.

1. washwashed with 1N hydrochloric acid, water
2. dry with materialdried over Na2SO4
3. concentrationconcentrated
4. customThe product was purified by flash silica gel chromatography
5. washeluting with CH2Cl2