反应详情

To a solution of 4-(2-hydroxypropan-2-yl)benzonitrile (1.00 g, 6.20 mmol; obtained from 4-(propan-2-yl)benzonitrile according to literature procedure: Synth. Comm. 2006, 36, 2145-2155) in dichloromethane (20 mL) was added diethylamino sulfur trifluoride (DAST; 1.20 g, 7.44 mmol) at a temperature of 0° C. The reaction mixture was allowed to stirr at rt for 2 h, whereupon it was diluted with water and extracted with dichloromethane. The organic extract was washed with water, dried with anhydrous magnesium sulfate and filtered. After evaporation of the solvent, the crude product was purified by MPLC (silica, cyclohexane/ethyl acetate 95:5) to afford the title compound (675 mg, 67%): 1H NMR (400 MHz, CDCl3) δ 7.57 (d, 2H), 7.48 (d, 2H), 1.72 (s, 3H), 1.68 (s, 3H); ES-MS m/z 163, HPLC RT (Method F) 2.12 min.

1. extractionextracted with dichloromethane
2. extractionThe organic extract
3. washwas washed with water
4. dry with materialdried with anhydrous magnesium sulfate
5. filtrationfiltered
6. customAfter evaporation of the solvent
7. customthe crude product was purified by MPLC (silica, cyclohexane/ethyl acetate 95:5)