反应详情

温度

0 °C

Tf2O (3.07 mL, 18.2 mmol) was added dropwise to a solution of 2-methyl-5-(3-methyloxetan-3-yl)phenol (2.70 g, 15.2 mmol) and pyridine (1.71 mL, 21.2 mmol) in DCM (25 mL) at 0° C. The red/orange mixture was stirred at 0° C. for 1.5 h, then partitioned between DCM and water. The aqueous layer was extracted with DCM (2×). The combined organic layers were dried (Na2SO4), filtered, and concentrated. The residue was purified by silica gel chromatography (0-40% EtOAc/heptane) to provide 2-methyl-5-(3-methyloxetan-3-yl)phenyl trifluoromethanesulfonate. 1H NMR (400 MHz, CD2Cl2) δ ppm 7.38 (d, J=8.08 Hz, 1 H) 7.26 (dd, J=7.96, 1.89 Hz, 1 H) 7.14 (d, J=1.77 Hz, 1 H) 4.89 (d, J=5.56 Hz, 2 H) 4.66 (d, J=5.81 Hz, 2 H) 2.41 (s, 3 H) 1.75 (s, 3 H).

1. custompartitioned between DCM and water
2. extractionThe aqueous layer was extracted with DCM (2×)
3. dry with materialThe combined organic layers were dried (Na2SO4)
4. filtrationfiltered
5. concentrationconcentrated
6. customThe residue was purified by silica gel chromatography (0-40% EtOAc/heptane)