反应详情

To a solution of 2-{[(4-ethyl-1,3-thiazol-5-yl)methyl]sulfanyl}-6-(trifluoromethyl)pyrimidin-4-ol (500 mg, 1.56 mmol) in a mixture of 2:1 CCl4-DCM (40 mL) was dropwise added bromine (80 μL, 1.56 mmol) at 0° C. After 1 hour of stirring at room temperature, water and a solution of sodium thiosulfate were added. The mixture was extracted with DCM (3 times). The combined organic phases were washed with brine, dried over magnesium sulfate, and evaporated to afford a crude oil. The residue was dissolved in DCM and purified on silica gel using DCM/MeOH (0 to 15%) to provide 5-bromo-2-{[(4-ethyl-1,3-thiazol-5-yl)methyl]sulfanyl}-6-(trifluoromethyl)pyrimidin-4-ol as a white solid (72 mg, 12% yield). 1H NMR (500 MHz, DMSO-d6): δ 1.17 (t, J=7.4 Hz, 3H), 2.75 (q, J=7.4 Hz, 2H), 4.64 (s, 2H), 8.87 (s, 1H). LRMS (ES+) m/z 402 (50%, M+2), 400 (50%, M).

1. customat 0° C
2. extractionThe mixture was extracted with DCM (3 times)
3. washThe combined organic phases were washed with brine
4. dry with materialdried over magnesium sulfate
5. customevaporated
6. customto afford a crude oil
7. custompurified on silica gel