反应详情

温度

25 °C

A solution of 2,6-Difluoro-3-[4-(4-methoxy-phenyl)-thiazol-2-ylmethoxy]-benzamide (0.20 g, 0.53 mmol) in 15 ml of DCM was cooled to −78° C. followed by addition of BBr3 (0.2 ml, 2.14 mmol). The reaction mixture was stirred at 25° C. for 2 h. After the completion of the reaction mixture (TLC monitoring), solution of NaHCO3 (20 mL) was added at 0° C. and extracted with ethyl acetate (3×50 mL). The combined organics was washed with water, brine, dried (Na2SO4), filtered and concentrated, the residue was purified by column chromatography on silica (60-120 M) using ethyl acetate/hexane (50:50) as the eluent to provide the title compound as light yellow solid (0.06 g, 31%). 1H NMR (DMSO-d6, 400 MHz): δ 5.55 (s, 2H), 6.83 (d, J=8.40 Hz, 2H), 7.13 (m, 1H), 7.40 (m, 1H), 7.78 (d, J=8.80 Hz, 2H), 7.88 (br s, 1H), 7.91 (s, 1H), 8.17 (br s, 1H) and 9.64 (br s, 1H). MS ES+ (363.25), HPLC (method I) Rt=14.57 min.

1. extractionextracted with ethyl acetate (3×50 mL)
2. washThe combined organics was washed with water, brine
3. dry with materialdried (Na2SO4)
4. filtrationfiltered
5. concentrationconcentrated
6. customthe residue was purified by column chromatography on silica (60-120 M)