4-Hydroxybenzaldehyde → 4-(2,2,2-Trifluoroethoxy)benzaldehyde

Temperature

0 °C

To sodium hydride (60% in oil, 240 mg, 6.0 mmol) 0° C. was added 2 mL anhydrous dimethylsulfoxide. The resulting suspension was stirred for 15 minutes at 0° C. 4-Hydroxybenzaldehyde (610 mg, 5.0 mmol) was added dropwise as a solution in 2 mL dimethylsulfoxide and the resulting mixture stirred for 30 minutes at 0° C. Trifluoroethyl iodide (1.5 mL, 15.24 mmol) was added and the reaction mixture was heated to 55° C. for 24 h. The reaction mixture was cooled to room temperature and poured into water. Organics were extracted with ether (3×50 mL), dried with magnesium sulfate, filtered and concentrated. The crude residue was subjected to chromatography on silica gel (20% ethyl acetate in hexanes) to give 4-(2,2,2-trifluoroethoxyl)benzaldehyde (250 mg, 24%) as an oil. Used without further characterization.

1. stirringthe resulting mixture stirred for 30 minutes at 0° C
2. temperaturethe reaction mixture was heated to 55° C. for 24 h
3. temperatureThe reaction mixture was cooled to room temperature
4. extractionOrganics were extracted with ether (3×50 mL)
5. dry with materialdried with magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated

ORD record

ord-2e7f90b0e6ce47dd8e824f5c21900347

Source dataset

uspto-grants-2016_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09315495B2