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Mononuclear Nonheme Iron(III)-Iodosylarene and High-Valent Iron-Oxo Complexes in Olefin Epoxidation Reactions.

Research paper by Bin B Wang, Yong-Min YM Lee, Mi Sook MS Seo, Wonwoo W Nam

Indexed on: 15 Aug '15Published on: 15 Aug '15Published in: Angewandte Chemie International Edition



Abstract

High-spin iron(III)-iodosylarene complexes are highly reactive in the epoxidation of olefins, in which epoxides are formed as the major products with high stereospecificity and enantioselectivity. The reactivity of the iron(III)-iodosylarene intermediates is much greater than that of the corresponding iron(IV)-oxo complex in these reactions. The iron(III)-iodosylarene species-not high-valent iron(IV)-oxo and iron(V)-oxo species-are also shown to be the active oxidants in catalytic olefin epoxidation reactions. The present results are discussed in light of the long-standing controversy on the one oxidant versus multiple oxidants hypothesis in oxidation reactions.