Water → HCID 86695995, compound

Participants

Reaction Conditions

Reaction Steps

A solution of anthracenylmethyl quininium chloride (19 mg), nitromethane (0.025 ml) and 5-[(E)-3-(3,5-dichlorophenyl)-4,4,4-trifluoro-but-2-enoyl]-2-(1,2,4-triazol-1-yl)benzonitrile (100 mg) in toluene (2 mL) under argon, was heated for 2 hours at 50° C. then potassium carbonate (64 mg) was added. The reaction was heated for 24 hours at 50° C. then more nitromethane (0.02 mL) was added. The reaction was heated again at 50° C. for 3 hours then was allowed to stand at room temperature for 18 hours. Water was then added and the resulting mixture was extracted with dichloromethane and the combined organic fractions were dried over sodium sulfate. The crude product was purified by flash chromatography (0% to 50% ethyl acetate in cyclohexane) to afford 5-[(3R)-3-(3,5-dichlorophenyl)-4,4,4-trifluoro-3-(nitromethyl)butanoyl]-2-(1,2,4-triazol-1-yl)benzonitrile (69 mg). Chiral HPLC analysis (CHIRALPAK AS-RH, acetonitrile:Methanol:water=40:5:55, 1 ml/min, retention time 11.88 minutes (minor enantiomer), 13.88 minutes (major enantiomer) indicated that the reaction proceeded with 50% enantioselectivity in favor of the R enantiomer.

Provenance & Evidence