反应详情

A mixture of methyl 2-chloropyridin-3-carboxylate (6.8 g.), 4-fluorobenzeneboronic acid (7.2 g.), 1M. aqueous sodium carbonate (40 ml.), Pd(dppb)Cl2(1.2 g.), ethanol(10 ml.) and toluene(150 ml.) was stirred at reflux under an inert atmosphere for 5 hr. The reaction was then cooled, the oganic layer separated, the aqueous extracted with toluene and then the Icombined extracts dried and evaporated to dryness. The product was purified by flash column chromatography eluting wth ethyl acetate/iso-hexane(9:1,8:2,7:3) to give methyl 2-(4-fluorophenyl)pyridin-3-carboxylate as a white solid(7.5 g.)

1. temperatureat reflux under an inert atmosphere for 5 hr
2. temperatureThe reaction was then cooled
3. customthe oganic layer separated
4. extractionthe aqueous extracted with toluene
5. customthe Icombined extracts dried
6. customevaporated to dryness
7. customThe product was purified by flash column chromatography
8. washeluting wth ethyl acetate/iso-hexane(9:1,8:2,7:3)