反应详情

To a solution of 5-amino-2-isobutylbenzonitrile (D57) (34 g) in acetonitrile (500 mL) was added HBr (24.37 mL) at 0° C. Then a solution of sodium nitrite (16.16 g) in water (50 mL) was added to the reaction mixture. After stirring for 30 min, copper(II) bromide (87 g) and copper(I) bromide (5.60 g) were added to the reaction mixture. The mixture was stirred at room temperature for 16 h. Saturated aqueous sodium bicarbonate solution was added to quench the reaction. The mixture was extracted with EA. The combined organic solution was dried over anhydrous sodium sulphate. After filtration and concentration, the residue was purified by column chromatography to give 5-bromo-2-(2-methylpropyl)benzonitrile (D58) (36 g) as a colorless oil. 6H (CDCl3, 400 MHz): 0.96 (6H, d), 1.98 (1H, m), 2.69 (2H, d), 7.18 (1H, d), 7.64 (1H, dd), 7.55 (1H, d).

1. stirringThe mixture was stirred at room temperature for 16 h
2. customto quench
3. customthe reaction
4. extractionThe mixture was extracted with EA
5. dry with materialThe combined organic solution was dried over anhydrous sodium sulphate
6. filtrationAfter filtration and concentration
7. customthe residue was purified by column chromatography