Acetyl chloride → 2-Phenylbicyclo[1.1.1]pentan-2-yl acetate
反応式
[C:1]1([C:7]2([OH:12])[CH:10]3[CH2:11][CH:8]2[CH2:9]3)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[C:13](Cl)(=[O:15])[CH3:14]>N1C=CC=CC=1>[C:13]([O:12][C:7]1([C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)[CH:8]2[CH2:9][CH:10]1[CH2:11]2)(=[O:15])[CH3:14]参加物
4
反応条件
- 温度
- 0 °C
実験手順
To a stirring solution of 2.7 g (16.8 mmol) of 2-phenylbicyclo[1.1.1]pentan-2-ol in pyridine (15 mL) at 0° C. was added dropwise acetyl chloride (1.5 mL, 21.0 mmol) in a nitrogen atmosphere. The reaction mixture was stirred for 0.5 h at 0° C. and for 1 h at room temperature. The solution was poured onto ice and extracted with 50 mL of diethyl ether twice. The combined diethyl ether solution was washed with saturated aqueous sodium bicarbonate solution and with saturated aqueous copper sulfate solution. After drying over anhydrous magnesium sulfate, the solution was concentrated and the crude product was purified by column chromatography (0-5% ethyl acetate in petroleum ether) to give the desired product (2.7 g, 13.4 mmol, yield: 80%). 1H NMR (400 MHz, CDCl3) δ ppm 7.47-7.26 (m, 5H), 3.31 (s, 2H), 2.43 (dd, J1=10.4 Hz, J2=2.8 Hz, 1H), 1.95 (s, 3H), 1.80 (d, J=2.8 Hz, 1H), 1.66 (d, J=3.2 Hz, 1H), 1.49 (dd, J1=10.4, J2=3.2 Hz, 1H).