反应详情

温度

140 °C

A mixture of 2-bromo-1,3-benzothiazol-6-amine (53 mg, 0.23 mmol), 2-methoxy-5-pyridineboronic acid (50 mg, 0.327 mmol), Pd(dppf)Cl2*DCM (8 mg, 0.01 mmol) and sodium carbonate (0.1 g, 1 mmol) in THF/water (9:1, 3 mL) was heated at 140° C. for 10 minutes in a microwave reactor under argon atmosphere. The mixture was filtered and washed with THF/water (9:1). After having added DCM to the filtrate, the organic layer to was washed with brine, dried (Na2SO4), filtered and concentrated. The crude product was purified by flash column chromatography (20 to 70% ethyl acetate in heptane), to yield the title compound (57 mg) as an off-white solid. 1H NMR. (CHLOROFORM-d) δ 8.68 (d, 1H) 8.16 (dd, 1 H) 7.74 (d, 1 H) 7.06 (d, 1 H) 6.70-6.81 (m, 2 H) 3.94 (s, 3 H) 3.77 (s, 2 H); MS m/z (M+H) 258.

1. filtrationThe mixture was filtered
2. washwashed with THF/water (9:1)
3. additionAfter having added DCM to the filtrate
4. washthe organic layer to was washed with brine
5. dry with materialdried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated
8. customThe crude product was purified by flash column chromatography (20 to 70% ethyl acetate in heptane)