反应详情

温度

80 °C

Combine methyl-4-bromobenzoate (1.0 g, 4.65 mmol), 2-chlorophenylboronic acid (799 mg, 5.1 mmol), Pd(OAc)2 (51 mg, 0.46 mmol) and sodium carbonate (1.5 g, 13.9 mmol) in DMF (20 mL) and water (2.0 mL) with stirring. Purge the reaction mixture with argon, add triphenylphosphine (61 mg, 0.23 mmol) and purge again with argon. Place the sealed reaction in an oil bath maintained at 80° C. and allow to stir for 1 hour. Cool the reaction to room temperature, dilute with ethyl acetate and filter through a short plug of celite with additional ethyl acetate. Wash the organics with water, dry over MgSO4, filter and evaporate. Purification by flash column chromatography yields 2′-chlorobiphenyl-4-carboxylic acid methyl ester as a yellow solid. Dissolve the purified ester in THF (0.25M) and add an equal volume of 1M NaOH. Stir vigorously at room temperature for 15 hours. Upon completion, acidify the reaction with conc. HCl and extract with ethyl acetate. Evaporation of the solvent yields 762 mg (67%) of the title compound. MS (m/e): 231.1 (M−).

1. customPurge the reaction mixture with argon
2. custompurge again with argon
3. customthe sealed reaction in an oil bath
4. temperatureCool
5. customthe reaction to room temperature
6. filtrationfilter through a short plug of celite with additional ethyl acetate
7. washWash the organics with water
8. dry with materialdry over MgSO4
9. filtrationfilter
10. customevaporate
11. customPurification by flash column chromatography