反应详情

To a solution of N-(4′-chloro-3-ethylbiphen-4-yl)acetamide (18 g, 0.06 mol) in dioxane (126 ml), is added concentrated hydrochloric acid (36 ml) and the reaction mixture is heated at reflux for 2 hours. The dioxane is evaporated under reduced pressure. The residue is diluted with water, the solution made basic by addition of 2N aqueous potassium hydroxide solution and extracted with ethyl acetate (3×500 ml). The organic extracts are combined and concentrated under reduced pressure to give 4′-chloro-3-ethylbiphen-4-ylamine (13.5 g).

1. temperaturethe reaction mixture is heated
2. temperatureat reflux for 2 hours
3. customThe dioxane is evaporated under reduced pressure
4. additionThe residue is diluted with water
5. additionthe solution made basic by addition of 2N aqueous potassium hydroxide solution
6. extractionextracted with ethyl acetate (3×500 ml)
7. concentrationconcentrated under reduced pressure