反应详情

温度

100 °C

To a stirred solution of 5-bromo-2-chloropyrimidine (500 mg) in DMF (5 mL) was added ethyl acrylate (1.41 mL), palladium(II) acetate (29 mg), tris(2-methylphenyl)phosphine (118 mg), and N,N-diisopropylethylamine (1.35 mL). The mixture was stirred at 100° C. for 4 hours. The resulting mixture was allowed to cool to ambient temperature, poured into brine, and extracted with ethyl acetate. The organic phase was washed with brine, dried over Na2SO4, and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with a mixture of hexane and ethyl:acetate (90:10 v/v) to give ethyl (2E)-3-(2-chloro-5-pyrimidinyl)acrylate (494 mg) as a yellow powder.

1. temperatureto cool to ambient temperature
2. extractionextracted with ethyl acetate
3. washThe organic phase was washed with brine
4. dry with materialdried over Na2SO4
5. concentrationconcentrated in vacuo
6. customThe residue was purified by silica gel column chromatography
7. washeluting with a mixture of hexane and ethyl:acetate (90:10 v/v)