4-Hydroxybenzoic Acid → Cyclohexanecarboxylic acid

Participants

Reaction Steps

One mole of 4-hydroxybenzoic acid was reacted with two moles of hydrogen in the presence of 5% palladium-carbon catalyst. This reaction was carried out in isopropyl alcohol at a temperature of 130°-140° C. and a hydrogen pressure of 20-40 kg/cm2 (gauge) After the reaction mixture was filtered to recover the catalyst therefrom, the filtrate was distilled to recover the solvent. The resulting residue was recrystallized from a mixture of benzene and hexane to obtain cyclohexane-4-carboxylic acid. This product had a melting point of 67.0°-68.0° C.

Provenance & Evidence