| 摘要 |
PURPOSE:To obtain mixed dihydric phenols consisting of pyrocathecol and hydroquinones with high selectivity, by direct oxidation of phenols with a peroxide in the presence of an amino acid. CONSTITUTION:Phenols, e.g. phenol, cresol, etc. are oxidized with at least one type of peroxide selected from organic peracids, e.g. peracetic acid, etc., a hydrogen peroxide, and an organic hydroperoxide in the presence of an alpha-amino acid having at least one type of functional group selected from OH, mercapto, amino, amido. and p-hydroxybenzyl groups at the beta-or farther position, e.g. epsilon-aminocaproic or gamma-aminobutyric acid, or an amino acid having two or more carbon atoms between the amino group and the carboxyl group at 0.-100 deg.C to give dihydric phenols. The amount of the amino acid is preferably 10<-5>-10<-1> mole per mole of phenols. |
