Acetic Acid → HCID 15591125, compound

Participants

Reaction Steps

In a mixed solvent of 2.5 ml of anisole and 2.5 ml of trifluoroacetic acid was dissolved 0.25 g of methyl 6-(4-diphenylmethyloxycarbonylphenyl)-1-(4-fluorophenyl)-4-oxo-1,4-dihydronicotinate, and they were reacted at room temperature for 1.5 hours. After completion of the reaction, the solvent was removed by distillation under reduced pressure, and the residue was dissolved in a mixed solvent of 2.5 ml of ethanol and 2.5 ml of a 1N aqueous sodium hydroxide solution, and the resulting solution was subjected to reaction at room temperature for 3 hours. After completion of the reaction, 20 ml of water and 20 ml of benzene were added to the reaction mixture and the aqueous layer was separated. The aqueous solution thus obtained was adjusted to a pH of 5.5 with acetic acid and the precipitated crystals were collected by filtration, to obtain 0.10 g of 6-(4-carboxyphenyl)-1-(4-fluorophenyl)-4-oxo-1,4-dihydronicotinic acid having a melting point of 280° C. or more.

Provenance & Evidence