反应详情

温度

110 °C

To Pd[P(t-Bu)3]2 (0.210 g, 0.411 mmol) was added dioxane (6 mL), methyl acrylate (2.00 mL, 22.2 mmol), N,N-dicyclohexylmethylamine (3.60 mL, 17.0 mmol), and 3-bromo-2-fluoropyridine (1.02 g, 5.80 mmol). The reaction mixture was degassed and heated to 110° C. for 5 min. The reaction was cooled to room temperature and diluted with EtOAc. The organic phase was washed with water (1×), brine (1×), dried over MgSO4, filtered, and concentrated. Purification by flash column chromatography on silica gel (10% to 50% EtOAc in hexanes) gave the product which contained Cy2NMe. The Cy2NMe was removed by dissolving the mixture in DCM (5 mL) and diluting with hexanes (10 mL). The solution was concentrated to a volume of 5 mL and the solid precipitate was collected by filtration and dried under high vacuum to give (E)-methyl 3-(2-fluoropyridin-3-yl)acrylate as a white solid. MS (ESI, pos. ion) m/z: 182.1 (M+1).

1. customThe reaction mixture was degassed
2. temperatureThe reaction was cooled to room temperature
3. additiondiluted with EtOAc
4. washThe organic phase was washed with water (1×), brine (1×)
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated
8. customPurification by flash column chromatography on silica gel (10% to 50% EtOAc in hexanes)
9. customgave the product which
10. customThe Cy2NMe was removed
11. dissolutionby dissolving the mixture in DCM (5 mL)
12. additiondiluting with hexanes (10 mL)
13. concentrationThe solution was concentrated to a volume of 5 mL
14. filtrationthe solid precipitate was collected by filtration
15. customdried under high vacuum