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Activation of a Non-Heme FeIII -OOH by a Second FeIII to Hydroxylate Strong C-H Bonds: Possible Implications for Soluble Methane Monooxygenase.


ABSTRACT: Non-heme iron oxygenases contain either monoiron or diiron active sites, and the role of the second iron in the latter enzymes is a topic of particular interest, especially for soluble methane monooxygenase (sMMO). Herein we report the activation of a non-heme FeIII -OOH intermediate in a synthetic monoiron system using FeIII (OTf)3 to form a high-valent oxidant capable of effecting cyclohexane and benzene hydroxylation within seconds at -40?°C. Our results show that the second iron acts as a Lewis acid to activate the iron-hydroperoxo intermediate, leading to the formation of a powerful FeV =O oxidant-a possible role for the second iron in sMMO.

SUBMITTER: Kal S 

PROVIDER: S-EPMC6555659 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Activation of a Non-Heme Fe<sup>III</sup> -OOH by a Second Fe<sup>III</sup> to Hydroxylate Strong C-H Bonds: Possible Implications for Soluble Methane Monooxygenase.

Kal Subhasree S   Que Lawrence L  

Angewandte Chemie (International ed. in English) 20190509 25


Non-heme iron oxygenases contain either monoiron or diiron active sites, and the role of the second iron in the latter enzymes is a topic of particular interest, especially for soluble methane monooxygenase (sMMO). Herein we report the activation of a non-heme Fe<sup>III</sup> -OOH intermediate in a synthetic monoiron system using Fe<sup>III</sup> (OTf)<sub>3</sub> to form a high-valent oxidant capable of effecting cyclohexane and benzene hydroxylation within seconds at -40 °C. Our results show  ...[more]

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