Water → HCID 21105731, compound

Participants

Reaction Steps

To a solution (20 ml) of 1-[chloro(hydroxyimino)methyl]-4-trifluoromethylbenzene (0.849 g) and 3-ethynylbenzaldehyde (0.521 g) in tetrahydrofuran was added dropwise a solution (10 ml) of triethylamine (1.12 ml) in tetrahydrofuran at 0° C. This mixture was stirred overnight at room temperature and poured into water. The mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate and concentrated. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1, volume ratio) and recrystallized from hexane-ethyl acetate to give 3-[3-(4-trifluoromethylphenyl)-5-isoxazolyl]benzaldehyde (0.660 g, yield 52%) as colorless needle crystals. melting point: 151–152° C.

Provenance & Evidence