反应详情

A solution of 1-BOC-6-(2,4-difluorophenoxy)-3-iodo-1H-pyrazolo[4,3-c]pyridine (0.071 g) and 2-chlorophenylboronic acid in 5 mL of benzene and 1 mL of methanol was stirred at room temperature for 15 minutes. To this solution was added tetrakis(triphenylphosphine)palladium catalyst (52 mg) and 0.3 mL of 1 M sodium carbonate. The resulting mixture was heated to reflux for five hours, cooled, filtered and the organic layer was separated. The organic layer was washed, dried and concentrated. The residue was purified via chromatography using 5% ethyl acetate in hexane as the eluent to afford 45 mg of 3-(2-chlorophenyl)-6-(2,4-difluorophenoxy)-pyrazolo[4,3-c]pyridine-1-carboxylic acid, tert-butyl ester (66% yield). Mass. Spec. M+H=458.

1. temperatureThe resulting mixture was heated
2. temperatureto reflux for five hours
3. temperaturecooled
4. filtrationfiltered
5. customthe organic layer was separated
6. washThe organic layer was washed
7. customdried
8. concentrationconcentrated
9. customThe residue was purified via chromatography