反应详情

温度

100 °C

2-(2-methyl-pyridin-3-yl)-propan-2-ol (1.30 g, 8.61 mmol) and DMAP (30 mg) were combined in Ac2O (8 mL) and stirred at 100° C. for 16 hours. Following removal of the solvent under reduced pressure, the brown residue was quenched with saturated NaHCO3 (50 mL) and extracted with CH2Cl2 (5×60 mL). The combined organic extracts were dried (Na2SO4), filtered, and concentrated in vacuo to afford a yellow oil. Purification via column chromatography on silica gel (CH2Cl2:MeOH, 95:5, v/v) afforded acetic acid 1-methyl-1-(2-methyl-pyridin-3-yl)-ethyl ester as a white crystalline solid (1.25 g, 75%). 1H NMR (CDCl3) δ 1.80 (s, 3H), 2.05 (s, 3H), 2.66 (s, 3H), 7.12 (dd, 1H, J=9.0, 6.0 Hz), 7.62 (dd, 1H, J=9.0, 3.0 Hz), 8.39 (dd, 1H, J=6.0, 3.0 Hz).

1. customremoval of the solvent under reduced pressure
2. customthe brown residue was quenched with saturated NaHCO3 (50 mL)
3. extractionextracted with CH2Cl2 (5×60 mL)
4. dry with materialThe combined organic extracts were dried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customto afford a yellow oil
8. customPurification via column chromatography on silica gel (CH2Cl2