反应详情

To a solution of 191 mg (0.73 mmol) of 4′-chloro-2-methyl-biphenyl-4-carboxylic acid methyl ester in 4 mL of carbon tetrachloride (CCl4) was added 9.7 mg (0.04 mmol) of benzoyl peroxide, followed by 124 mg (0.696 mmol) of N-bromosuccinimide (NBS), and the reaction mixture was heated at reflux for 6 h. The mixture was cooled to rt, diluted with dichloromethane and washed with water and brine. The organic layer was dried over sodium sulfate and concentrated to give 132 mg (53%) of 2-bromomethyl-4′-chloro-biphenyl-4-carboxylic acid methyl ester, as an oil, which was used without any further purification in the next step. 1H NMR δ CDCl3 8.10 (s, 1H), 7.91–7.89 (d, J=8.0 Hz, 1H), 7.37–7.35 (d, J=8.3 Hz, 2H), 7.30–7.18 (d, J=8.7 Hz, 2H), 7.22–7.20 (d, J=8.0 Hz, 1H), 4.30 (s, 2H), 3.87 (s, 3H).

1. temperaturethe reaction mixture was heated
2. temperatureat reflux for 6 h
3. washwashed with water and brine
4. dry with materialThe organic layer was dried over sodium sulfate
5. concentrationconcentrated