反应详情

To a solution of ethyl 3-(2-bromophenyl)-3-methylpropionate (28.04 g, 109.1 mmole) in the mixture of ethanol (200 ml) and water (100 ml) was added potassium hydroxide (12.2 g, 218.2 mmole). The solution was heated under reflux for 5 hours, left standing overnight as it was, the solvent was removed to about half of its original amount, and dilute hydrochloric acid was added to the concentrate. To this mixture was added dichloromethane followed by an aqueous ammonium chloride solution, the layers were separated, and the organic layer was dried over magnesium sulfate. The solvent was removed by distillation under reduced pressure to give 3-(2-bromophenyl)-3-methylpropionic acid (27.97 g, quant.).

1. temperatureThe solution was heated
2. temperatureunder reflux for 5 hours
3. waitleft
4. customthe solvent was removed to about half of its original amount, and dilute hydrochloric acid
5. additionwas added to the concentrate
6. additionTo this mixture was added dichloromethane
7. customthe layers were separated
8. dry with materialthe organic layer was dried over magnesium sulfate
9. customThe solvent was removed by distillation under reduced pressure