PROCESS FOR PREPARING CYCLOHEXANECARABOXYLIC ACID USING [2+4] DIELS-ALDER REACTION

摘要

PURPOSE: A preparing method of cyclohexanecarboxylic acid using 1,3-butadiene and acrylic acid is provided which is advantageous in that the reaction can be carried out in a relatively simple and easy manner. CONSTITUTION: A method comprises subjecting 1,3-butadiene and acrylic acid to £2+4| Diels-Alder reaction to produce 3-cyclohexene-1-carboxylic acid and then hydrogenating. The £2+4| Diels-Alder reaction is carried out at a temperature of ordinary temperatures to 200°C in an aromatic hydrocarbon solvent such as toluene or xylene. The hydrogenation is carried out at a temperature of ordinary temperatures to 150°C under a hydrogen pressure of 10 to 150 psi in the presence of a palladium or platinum catalyst. The method is featured in that it enables the use of 1,3-butadiene as the raw material for fine chemicals, unlike the prior methods.