2,3-Dichloro-5,6-dicyano-1,4-benzoquinone → HCID 21911878, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-amino-4-methoxyphenol (3.07 g, 22.09 mmol) and 4-fluorobenzaldehyde (3.55 mL, 33.14 mmol) in 40 mL of methanol was stirred at 45° C. overnight. The solvent was evaporated under reduced pressure, and the residue was dissolved in methylene chloride (50 mL), to which was added DDQ (6.02 g, 26.51 mmol) slowly. The resulting mixture was stirred at room temperature for 45 minutes. The solvent was evaporated under reduced pressure, and to the residue was added 300 mL of ethyl acetate. The organic layer was washed sequentially with saturated sodium bicarbonate and brine, dried over sodium sulfate, and evaporated under reduced pressure. Column chromatography (ethyl acetate: Hexanes=1:9) gave 2-(4-fluorophenyl)-5-methoxybenzoxazole as a white solid.

Provenance & Evidence