反应详情

温度

0 °C

To a stirred solution of 5-acetyl-2-chloro-phenylaniline (which was obtained in Example 22) (7.40 g, 43.5 mmol) in CH2Cl2 (200 mL) and pyridine (40 mL) at 0˜5° C. was added dropwise methanesulfonyl chloride (5.0 g, 43.6 mmol) in 50 mL of CH2Cl2. After 1 hour at 0° C. the mixture was warmed to room temperature and stirred at room temperature for another hour. The solvents were removed and the residue was dissolved in CH2Cl2 (500 mL). The reaction mixture was washed with water and the organic layer was dried (MgSO4) and concentrated. The product was purified by flash silica gel chromatography eluting with ethyl acetate and hexanes to give the title compound as a white solid (6.1 g, 57%); 1H NMR (300 MHz, DMSO-d6) δ 2.58(s, 3 H), 3.08(s, 3 H), 7.69(d, J=8.3 Hz, 1 H), 7.83(dd, J=8.3, 2.1 Hz, 1 H), 7.94(d, J=2.1 Hz, 1 H), 9.69(s, 1 H); MS (ES) m/z: 245.9 ((M−H)−, 100%); HRMS Calcd. for C9H11ClNO3S(MH+): 248.0148. Found: 248.0135.

1. customThe solvents were removed
2. dissolutionthe residue was dissolved in CH2Cl2 (500 mL)
3. washThe reaction mixture was washed with water
4. dry with materialthe organic layer was dried (MgSO4)
5. concentrationconcentrated
6. customThe product was purified by flash silica gel chromatography
7. washeluting with ethyl acetate and hexanes