CATION-EXCHANGE RESIN-CATALYZED ESTERIFICATION OF ACETIC-ACID WITH 2-(1-CYCLOHEXENYL)CYCLOHEXANONE

Self-aldol condensation of cyclohexanone yields a mixture of 2-(1-cycl ohexenyl)cyclohexanone (I), 2-cyclohexylidenecyclohexanono (II) and su bsequent condensation products. An acid-treated clay catalyst was empl oyed to selectively obtain the beta, gamma-unsaturated ketone (I). (I) was separated from the reaction mixture by fractional vacuum distilla tion and subsequently esterified with acetic acid to synthesise the co rresponding ester, 2-(2-cyclohexyl acetate)cyclohexanone, a precursor of [1,1-biphenyl]-2,2'-diol, which has applications in plasticizers, p esticides, as a diluent in epoxy resins, etc. The applicability of cat ion exchange resins and an acid-treated clay for the esterification of 2-(1-cyclohexenyl)cyclohexanone with acetic acid was explored.