Hydrochloric Acid → HCID 21388393, compound

Participants

Reaction Steps

59.3 g (0.163 mol) of methyl 2-(4-chloro-phenyl)-2-(4-fluoro-3-trifluoromethyl-phenoxy)-acetate are added to a solution of 15 g of sodium hydroxide in 400 ml of water. The suspension obtained is stirred and heated at the reflux temperature until a limpid solution is obtained (duration, 4 hours). The reaction mixture is cooled and acidified with a hydrochloric acid solution; an oil precipitates, which is extracted with ether. The ether phase is washed with water and dried and the solvent is driven off. The residue is triturated in petroleum ether until it crystallises, and is recrystallised from a mixture of hexane and cyclohexane (50-50). 43 g (yield: 75%) of 2-(4-chlorophenyl)-2-(4-fluoro-3-trifluoromethyl-phenoxy)-acetic acid are thus obtained. Melting point = 106° C.

Provenance & Evidence