反应详情

温度

80 °C

To a solution of 4-(benzo[d]thiazol-2-ylamino)phenol (3.1 g, 12.8 mmol) and 2,3-dichloropyrazine (2.29 g, 15.4 mmol) in DMSO (35 mL) was added cesium carbonate (5.0 g, 15.4 mmol). The reaction mixture was heated to 80° C. for 2 h. The mixture was cooled to RT, diluted with EtOAc and brine. The aqueous layer was extracted with EtOAc (2×) and the combined organics were dried over Na2SO4, filtered and concentrated. The crude product was chromatographed through a Redi-Sep® pre-packed silica gel column (120 g), eluting with a gradient of 0% to 100% EtOAc in hexane, to provide N-(4-(3-chloropyrazin-2-yloxy)phenyl)benzo[d]thiazol-2-amine as light-tan solid.

1. temperatureThe mixture was cooled to RT
2. extractionThe aqueous layer was extracted with EtOAc (2×)
3. dry with materialthe combined organics were dried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated
6. customThe crude product was chromatographed through a Redi-Sep® pre-packed silica gel column (120 g)
7. washeluting with a gradient of 0% to 100% EtOAc in hexane