反应详情

Metachloroperbenzoic acid (0.23 g) was added to a solution of 1-{4-[4-(2-benzylamino-ethyl)-phenoxy]-phenyl}-ethanone (0.36 g) in chloroform (25 mL) while stirring at room temperature. Stirring was continued overnight then the reaction was diluted with dichloromethane, washed with saturated aqueous sodium thiosulfate, dried over sodium chloride/magnesium sulfate, filtered, and concentrated on a rotary evaporator. The residue was diluted with methanol (5 mL) and saturated aqueous sodium bicarbonate (5 mL) then stirred overnight at room temperature. The methanol was removed on a rotary evaporator and the pH of the residue was adjusted to 7-8 then extracted with dichloromethane (3×30 mL). The combined dichloromethane extracts were dried over sodium chloride/magnesium sulfate, filtered, and concentrated on a rotary evaporator to yield 0.4 g of crude product, which was purified by flash column chromatography on silica gel eluting with ethanol in dichloromethane to yield Acetic acid 4-[4-(2-benzylamino-ethyl)-phenoxy]-phenyl ester (117 mg), 1H NMR (CDCl3, 300.00 MHz): 8.01-7.93 (m, 2H), 7.42-7.21 (m, 7H), 7.06-6.97 (m, 4H), 3.87 (s, 2H), 3.02-2.94 (m, 4H), 2.61 (s, 3H); m/z=361.85 (M+1).

1. stirringStirring
2. washwashed with saturated aqueous sodium thiosulfate
3. dry with materialdried over sodium chloride/magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated on a rotary evaporator
6. additionThe residue was diluted with methanol (5 mL) and saturated aqueous sodium bicarbonate (5 mL)
7. stirringthen stirred overnight at room temperature
8. customThe methanol was removed on a rotary evaporator
9. extractionthen extracted with dichloromethane (3×30 mL)
10. dry with materialThe combined dichloromethane extracts were dried over sodium chloride/magnesium sulfate
11. filtrationfiltered
12. concentrationconcentrated on a rotary evaporator
13. customto yield 0.4 g of crude product, which
14. customwas purified by flash column chromatography on silica gel eluting with ethanol in dichloromethane