反应详情

温度

100 °C

To a 50 mL round-bottomed flask was added N-(2-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)-3-(difluoromethoxy)benzenesulfonamide (98 mg, 213 μmol), 2-amino-6-bromobenzothiazole (49 mg, 213 μmol), tetrakis(triphenylphosphine)palladium (25 mg, 21 μmol), sodium carbonate (213 μl, 425 μmol), dioxane (3 mL). The reaction mixture was stirred at 100° C. for 5 h. The mixture was cooled down to room temperature. The reaction mixture was diluted with water (2 mL) and extracted with EtOAc (3×20 mL). The organic extract was washed with saturated NaCl (10 mL), dried over Na2SO4, filtered and concentrated in vacuo and the residue was purified by silica gel chromatography, eluting with 80% EtOAc/hexanes to give N-(5-(2-aminobenzo[d]thiazol-6-yl)-2-chloropyridin-3-yl)-3-(difluoromethoxy)benzenesulfonamide (48 mg, 47% yield) as a white solid. MS (ESI pos. ion) m/z calc'd for C19H13ClF2N4O3S2: 482.0. found 483.0.1H NMR (300 MHz, MeOH) δ ppm 6.88 (t, J=73.08 Hz, 1H) 7.38-7.71 (m, 5H) 7.91 (d, J=1.17 Hz, 1H) 8.17 (d, J=2.19 Hz, 1H) 8.46 (d, J=2.34 Hz, 1H)

1. temperatureThe mixture was cooled down to room temperature
2. extractionextracted with EtOAc (3×20 mL)
3. extractionThe organic extract
4. washwas washed with saturated NaCl (10 mL)
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customthe residue was purified by silica gel chromatography
9. washeluting with 80% EtOAc/hexanes