Copper(I)-Dioxygen Adducts and Copper Enzyme Mechanisms

Overview

Journal Isr J Chem

Specialty Chemistry

Date 2016 Dec 3

PMID 27909346

Citations 26

Authors

Jeffrey J Liu

Daniel E Diaz

David A Quist

Kenneth D Karlin

Affiliations

Soon will be listed here.

Abstract

Primary copper(I)-dioxygen (O) adducts, cupric-superoxide complexes, have been proposed intermediates in copper-containing dioxygen-activating monooxygenase and oxidase enzymes. Here, mechanisms of C-H activation by reactive copper-(di)oxygen intermediates are discussed, with an emphasis on cupric-superoxide species. Over the past 25 years, many synthetically derived cupric-superoxide model complexes have been reported. Due to the thermal instability of these intermediates, early studies focused on increasing their stability and obtaining physical characterization. More recently, in an effort to gain insight into the possible substrate oxidation step in some copper monooxygenases, several cupric-superoxide complexes have been used as surrogates to probe substrate scope and reaction mechanisms. These cupric superoxides are capable of oxidizing substrates containing weak O-H and C-H bonds. Mechanistic studies for some enzymes and model systems have supported an initial hydrogen-atom abstraction via the cupric-superoxide complex as the first step of substrate oxidation.

Citing Articles

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