催化作用
分子识别
水溶液
化学
水介质
碳氢化合物
化学工程
组合化学
有机化学
分子
工程类
作者
Hiroto Fujisaki,Tomoya Ishizuka,Hiroaki Kotani,Takahiko Kojima
标识
DOI:10.1021/acscatal.3c05118
摘要
Oxidation enzymes possess finely organized structures to recognize specific substrates, leading to the efficient catalysis of selective oxidation reactions to generate the desired products. Inspired by such enzymes, molecular catalysts with substrate-recognition sites have been developed for decades. Here, we report the highly selective oxidation of aromatic substrates in aqueous media by catalysis with an FeII complex featuring a hydrophobic second coordination sphere (SCS) constructed by four anthracenyl groups. The FeII catalyst showed a much higher turnover frequency for the benzene-to-phenol oxidation (1.0 × 104 h–1) than for the cyclohexane-to-cyclohexanol oxidation (12 h–1). The SCS of the FeII complex works as a trapping site of aromatic substrates through π–π interaction and assists the release of the hydrophilic oxidized products to the aqueous media. A “recognition-and-release” approach also allowed the selective formation of anthracen-9-ol and 1-naphthol by direct oxidation of anthracene and naphthalene, respectively.
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