Water → HCID 76714290, compound

Participants

Reaction Steps

4.00 g (15.37 mmol) of 2,2,2-trifluoro-1-[3-fluoro-5-(trifluoromethyl)phenyl]ethanone hydrate from Stage 1 were stirred in a mixture of 37.3 ml of pyridine and 26.9 ml of ethanol, and stirred at reflux temperature for approx. 18 hours. After cooling, the entire reaction mixture was admixed with water and then concentrated under reduced pressure. The remaining residue was purified by means of column chromatography using silica gel (silica gel 60—Merck, particle size: 0.04 to 0.063 mm; cyclohexane/acetone gradient) to obtain 2.18 g (51.5% of theory) of 2,2,2-trifluoro-1-[3-fluoro-5-(trifluoromethyl)phenyl]ethanone oxime as a syn/anti isomer mixture.

Provenance & Evidence