A METHOD OF PREPARING CYCLOHEXANECARABOXYLIC ACID USING [2+4] DIELS-ALDER REACTION

摘要

Disclosed herein is a method of preparing cyclohexanecarboxylic acid in whic h 1,3-butadiene and acrylic acid are subjected to [2+4] Diels-Alder reaction t o produce 3-cyclohexene-1-carboxylic acid which is then hydrogenated. The [2+4 ] Diels-Alder reaction is carried out at a temperature of room temperature to 200 ~C in an aromatic hydrocarbon solvent, such as toluene or xylene. The hydrogenation is carried out at a temperature of room temperature to 150 ~C under a hydrogen pressure of 10 psi to 150 psi in the presence of the platin um of palladium catalyst. The disclosed method is featured in that it enables t he use of 1,3-butadiene as the raw material for fine chemicals, unlike the prio r methods. Moreover, the method disclosed is advantageous in that the reaction can be carried out in a relatively simple and easy manner and also the reaction by-products can be conveniently treated after the reaction.