反应详情

温度

23 °C

A solution of 3-bromo-2-fluoropyridine (4 g, 22.73 mmol), 2-cyclopenten-1-one (7.35 mL, 91 mmol), n-methyldicyclohexylamine (12.05 mL, 56.8 mmol) and bis(tri-tert-butylphosphine)palladium (0) (0.581 g, 1.136 mmol) in 1,4-dioxane (50 mL) was heated to 105° C. in a capped vessel. After 21 h, the reaction was cooled to 23° C., diluted with EtOAc (400 mL) and washed with water (150 mL) and brine (150 mL), dried over MgSO4, concentrated in vacuo and purified by silica gel chromatography (eluant: 15-50% EtOAc/hexane), affording the product as a yellow solid. MS (ESI, pos. ion) m/z: 178.0 (M+1).

1. washwashed with water (150 mL) and brine (150 mL)
2. dry with materialdried over MgSO4
3. concentrationconcentrated in vacuo
4. custompurified by silica gel chromatography (eluant: 15-50% EtOAc/hexane)