Preparation of 4-substituted or unsubstituted tetrahydropyran-4-carboxylic acid compound or an ester compound

The present invention is the presence of an acid or base, formula (2): In the formula, R In a 4-substituted or unsubstituted-4-cyano-tetrahydropyran compound represented the formula (3): R Wherein, R And wherein the reacting water or an alcohol represented in the formula (1): In shown are 4-substituted or unsubstituted tetrahydropyran-4-carboxylic acid compound or to provide a production method of an ester compound.