Direct Oxidation of Aromatic Compounds Using Iron-Containing Catalysts

概要

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Oxidation of benzene by H2O2 and air was carried out in the presence of catalytic amount of ferrocene as a new oxidation catalyst. In the case of the oxidation by H2O2, highest yield of phenol based on H2O2 was 81.6%. On the other hand, the oxidation of benzene by air using ferrocene and CuCl as catalysts gave phenol in 4.7% yield based on benzene. When silica gel was added into the mixture, the yield of phenol remarkably increased (12.2%). The yield of pheno1 increased by, addition of H2O2 after 4 h and 8 h in the H2O2 oxidation system. This phenomenon was also appeared by addition of CuCl in the air oxidation system. Direct oxidation of 2,3,6-trimethylphenol (TMP) to trimethyl-p-benzoquinone (TMQ) using H2O2 catalyzed by hematin was carried out in 80-90% acetic acid. The yield of TMP determined by gas chromatographic analysis was almost quantitative. The oxidation of the other methyl substituted phenols catalyzed by hematin was also examined. The yield of p-benzoquinones depended on both number of substituted groups and steric hindrance of p-position.
山形大学の論文
1999-01-29