反应详情

To a stirred solution of C-(5-Bromo-benzothiazol-2-yl)-methylamine (0.780 g, 3.209 mmol) in CH2Cl2 (12 mL) is added triethylamine (1.2 mL, 8.024 mmol). To above solution is added drop wise methane sulfonyl chloride (0.5 mL, 6.419 mmol) at 0° C. then stirred at room temperature for 3 hours. The reaction mixture is concentrated in vacuo and the crude material is diluted with water and extracted with ethyl acetate. The organic layer is dried over sodium sulfate, concentrated and purified by combiflash using 50% ethyl acetate in hexane as an eluent to afford the title compound (0.45 g). 1HNMR (400 MHz, DMSO-d6) δ: 3.03 (s, 3H), 4.60 (d, J=5.72 Hz, 2H), 7.64-7.67 (dd, J1=1.88 Hz, J2=8.72 Hz, 1H), 7.88 (d, J=8.68 Hz, 1H), 8.21 (t, J=6 Hz, 1H), 8.40 (d, J=1.88 Hz, 1H). LC-MS (m/z): [M−H]=320.8.

1. concentrationThe reaction mixture is concentrated in vacuo
2. additionthe crude material is diluted with water
3. extractionextracted with ethyl acetate
4. dry with materialThe organic layer is dried over sodium sulfate
5. concentrationconcentrated
6. custompurified by combiflash