反应详情

温度

-5 °C

To a 250 ml three-necked flask were added 5.00 g (28.74 mmol) in theoretical amount of 3-cyclohexylpropionyl chloride prepared in the step 1, 3.11 g (28.74 mmol) methylphenyl ether and 150 ml dichloromethane. The resulting mixture was cooled in ice salt bath to −5° C., added portionwise 3.83 g (28.74 mmol) anhydrous AlCl3 under stirring, upon the completion of addition. The mixture was stirred at room temperature for 2 hours, poured into a mixture (150 g ice+5 ml concentrated hydrochloric acid), the organic layer was separated, concentrated under a reduced pressure to about 10 ml, the aqueous layer was extracted with ethyl acetate 2×50 ml, the organic phase was combined, washed with saturated aqueous sodium bicarbonate solution and then with saturated brine, dried over anhydrous magnesium sulfate, filtrated and concentrated to obtain a pale brown solid, which was recrystallized with petroleum ether to obtain a 5.6 g product as a white solid in a yield of 79.1%, mp: 64-65 └. 1H-NMR (CDCl3, 400 MHz) δ: 0.85˜1.00 (2H, m, CH2), 1.10˜1.40 (4H, m, 2×CH2), 1.61˜1.1.82 (7H, m), 2.92 (2H, t, J=7.56 Hz, COCH2), 3.87 (3H, s, OCH3), 6.23 (2H, d, J=8.68 Hz, ArH), 7.94 (2H, d, J=8.68 Hz, ArH); ESI-MS m/e (%): 269.2 (M+Na, 100), 247.2 (M+1, 71).

1. stirringThe mixture was stirred at room temperature for 2 hours
2. customthe organic layer was separated
3. concentrationconcentrated under a reduced pressure to about 10 ml
4. extractionthe aqueous layer was extracted with ethyl acetate 2×50 ml
5. washwashed with saturated aqueous sodium bicarbonate solution
6. dry with materialwith saturated brine, dried over anhydrous magnesium sulfate
7. filtrationfiltrated
8. concentrationconcentrated
9. customto obtain a pale brown solid, which
10. customwas recrystallized with petroleum ether