反应详情

A mixture of 3'-chloro-4-methoxybiphenyl (2.00 g), acetic acid (25 ml) and concentrated hydrobromic acid (25 ml) was heated at reflux for 6 hours. After cooling the reaction was added to water (200 ml) and the solution extracted with ether (300 ml). The ethereal solution was washed with saturated aqueous sodium hydrogencarbonate solution (2×150 ml), dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography over silica eluting with dichloromethane:hexane (1:1) then dichloromethane to give the sub-title compound as a white solid (1.44 g).

1. temperaturewas heated
2. temperatureat reflux for 6 hours
3. temperatureAfter cooling the reaction
4. extractionthe solution extracted with ether (300 ml)
5. washThe ethereal solution was washed with saturated aqueous sodium hydrogencarbonate solution (2×150 ml)
6. dry with materialdried over anhydrous magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customThe residue was purified by column chromatography over silica eluting with dichloromethane:hexane (1:1)