反应详情

A solution of 2-bromo-1-(3-methoxy-4-pyridin-2-ylphenyl)propan-1-one (153 mg, 0.50 mmol) and 2-aminothiazole (50 mg, 0.50 mmol) in ethanol (1 mL) was heated to reflux for 12 h, then concentrated. The residue was dissolved in ethyl acetate (25 mL) and washed with saturated aqueous NaHCO3 (10 mL) and brine (10 mL). The organic layer was dried (MgSO4), concentrated and purified by flash column chromatography on silica gel eluting with EtOAc:hexanes (2:1 to 1:0) to afford 6-(3-methoxy-4-pyridin-2-ylphenyl)-5-methylimidazo[2,1-b][1,3]thiazole. 1H NMR (CDCl3, 500 MHz) δ 8.73 (m, 1H), 7.94 (d, 1H), 7.88 (d, 1H), 7.73 (dt, 1H), 7.52 (s, 1H), 7.35 (dd, 1H), 7.34 (dd, 1H), 7.22 (m, 1H), 6.86 (dd, 1H), 3.98 (s, 3H), 2.66 (s, 3H) ppm. MS (ESI) 322 (M)+.

1. temperatureto reflux for 12 h
2. concentrationconcentrated
3. dissolutionThe residue was dissolved in ethyl acetate (25 mL)
4. washwashed with saturated aqueous NaHCO3 (10 mL) and brine (10 mL)
5. dry with materialThe organic layer was dried (MgSO4)
6. concentrationconcentrated
7. custompurified by flash column chromatography on silica gel eluting with EtOAc:hexanes (2:1 to 1:0)