反应详情

温度

25 °C

To a stirred solution of 2-(5-bromopyridin-3-yl)prop-2-en-1-ol (0.600 g, 2.79 mmol) in tetrahydrofuran (5 mL) at 0° C. under nitrogen was added borane-methyl sulfide complex (0.85 g, 11 mmol). The reaction mixture was heated to 25° C. and stirred for 5 h. The reaction mixture was cooled to 0° C. and 1.0 N sodium hydroxide (0.8 mL) was added drop wise followed by the addition of hydrogen peroxide (1.0 mL, 35 wt % solution in water). The reaction mixture was stirred at 0° C. for 2 h then partitioned between ethyl acetate and water. The aqueous layer was extracted with ethyl acetate. The organic portions were combined, washed with water, aqueous sodium sulfite and brine, dried with Na2SO4, filtered, and concentrated under reduced pressure. 2-(5-Bromopyridin-3-yl)propane-1,3-diol (0.29 g, 44.7%) was isolated by silica gel column chromatography using 50% EtOAc in hexanes as a yellow oil. 1H NMR (400 MHz, DMSO-d6) δ (ppm): 8.53 (d, 1H, J=2 Hz), 8.43 (d, 1H, J=4.8 Hz), 4.92 (s, 1H), 4.69 (t, 1H, J=4.4 Hz), 3.71-3.64 (m, 2H), 3.62-3.58 (m, 2H), 2.87 (t, J=6.4 Hz). LCMS Method W: retention time 0.80 min; [M+1]=232.

1. temperatureThe reaction mixture was cooled to 0° C.
2. stirringThe reaction mixture was stirred at 0° C. for 2 h
3. customthen partitioned between ethyl acetate and water
4. extractionThe aqueous layer was extracted with ethyl acetate
5. washwashed with water, aqueous sodium sulfite and brine
6. dry with materialdried with Na2SO4
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure