反应详情

温度

60 °C

Concentrated hydrochloric acid (22 ml) is added to a solution of (4′-chloro-3,5-diethylbiphen-4-yl)carbamic acid tert-butyl ester (22 g, 0.06 mol) in methanol (110 ml), and the reaction mixture is heated to 60° C. for 2 hours. The mixture is cooled to room temperature and most of the methanol is removed by evaporation under reduced pressure. The mixture is diluted with water, made basic by addition of 2N aqueous potassium hydroxide solution and extracted with ethyl acetate (3×200 ml). The organic extracts are combined and the solvents are removed under reduced pressure to give 4′-chloro-3,5-diethylbiphen-4-ylamine (9.6 g).

1. customis removed by evaporation under reduced pressure
2. additionThe mixture is diluted with water
3. additionmade basic by addition of 2N aqueous potassium hydroxide solution
4. extractionextracted with ethyl acetate (3×200 ml)
5. customthe solvents are removed under reduced pressure