反应详情

温度

55 °C

A MeCN (22 mL) solution of 2-(3-fluorophenyl)-4-methoxypyridine (2.21 g, 10.88 mmol) and N-bromosuccinimide (2.129 g, 11.96 mmol) in a 40-mL vial was wrapped in aluminum foil and stirred at 55° C. overnight. 22 h later, the reaction was cooled to rt, quenched with 1:1 sat. aq. NaHCO3:sat. aq. Na2S2O3 and extracted thrice with EtOAc. The organic extracts were combined, washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo to a brown oil. Column chromatography (50 g Snap Ultra column, 15% to 100% EtOAc/hept) afforded 5-bromo-2-(3-fluorophenyl)-4-methoxypyridine (0.420 g, 1.489 mmol, 13.69% yield) as a white amorphous solid. m/z (ESI) 282.0 (M+H)+.

1. temperature22 h later, the reaction was cooled to rt
2. customquenched with 1:1 sat. aq. NaHCO3
3. extractionaq. Na2S2O3 and extracted thrice with EtOAc
4. washwashed with brine
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo to a brown oil