反应详情

温度

120 °C

To a solution of 3-[5-bromo-4-(4-methoxy-phenyl)-thiazol-2-ylmethoxy]-2,6-difluoro-benzamide (0.2 g, 0.43 mmol) in 5 ml of anhydrous DMF:H2O (2:1) 4-pyridine boronic acid (0.108 g, 0.87 mmol), potassium phosphate (0.112 g, 0.51 mmol) was added. Then degassed the reaction mixture for the 10 minutes, and added dichlorobis [(triphenylphosphine)-palladium (II) (0.046 g, 0.06 mmol) and again degassed for 10 min. The reaction mixture was heated at 120° C. for 12 h under the nitrogen atmosphere. DMF was distilled off, after cooling to r.t. water was added into reaction mixture and extracted with ethyl acetate, The combined organic layers were dried over anhydrous Na2SO4, and evaporated to dryness under reduced pressure. The compound was purified by chromatography on silica (230-400μ) using ethyl acetate/hexane (50:50) as the eluent to provide the title compound as white solid (0.045 g, 49%). 1H NMR (DMSO-d6, 400 MHz): δ 3.80 (s, 3H), 5.59 (s, 2H), 6.94 (d, 2H, J=8.8 Hz (o-coupling), 7.14 (dt, 1H), 7.34 (d, 1H, J=6.0 Hz (o-coupling), 7.38 (d, 2H, J=8.8 Hz (o-coupling), 7.41-7.45 (m, 1H), 7.89 (broad s, 1H), 8.17 (s, 1H), 8.60 (dd, 1H) MS ES+ (454.12), HPLC (method 5) Rt=13.55 min.

1. customThen degassed the reaction mixture for the 10 minutes
2. customagain degassed for 10 min
3. distillationDMF was distilled off
4. temperatureafter cooling to r.t. water
5. additionwas added into reaction mixture
6. extractionextracted with ethyl acetate
7. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
8. customevaporated to dryness under reduced pressure
9. customThe compound was purified by chromatography on silica (230-400μ)