Specific Enhancement of Catalytic Activity by a Dicopper Core: Selective Hydroxylation of Benzene to Phenol with Hydrogen Peroxide.
作者： Tomokazu Tsuji , Antonius Andre Zaoputra , Yutaka Hitomi , Kaoru Mieda , Takashi Ogura
关键词: Benzene 、 Phenol 、 Chemistry 、 Medicinal chemistry 、 Catalysis 、 Ligand 、 Organic chemistry 、 Hydroxylation 、 Hydrogen peroxide 、 Homogeneous
摘要: A dicopper(II) complex, stabilized by the bis(tpa) ligand 1,2-bis[2-[bis(2-pyridylmethyl)aminomethyl]-6-pyridyl]ethane (6-hpa), [Cu2(μ-OH)(6-hpa)]3+, was synthesized and structurally characterized. This complex catalyzed selective hydroxylation of benzene to phenol using H2O2, thus attaining large turnover numbers (TONs) high H2O2 efficiency. The TON after 40 hours for production exceeded 12000 in MeCN at 50 °C under N2, highest value reported with homogeneous complexes. At 22 % conversion, (95.2 %) p-benzoquinone (4.8 %) were produced. mechanism activation is proposed.
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