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Pushing the limits of activity and stability: the effects of Lewis acids on non-heme iron–NHC epoxidation catalysts

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Abstract

The catalytic performance of tetradentate iron–NHC complexes in the epoxidation of cis-cyclooctene is considerably improved by addition of strong Lewis acids. Unprecedented TOFs of up to 410 000 h−1 are obtained by applying Sc(OTf)3, Ce(OTf)4 or the significantly cheaper Fe(ClO4)3·H2O as supporting additives. Due to reactivation of an oxo-bridged FeIII–O–FeIII deactivation species TONs of up to 1200 at 20 °C are achieved.

Graphical abstract: Pushing the limits of activity and stability: the effects of Lewis acids on non-heme iron–NHC epoxidation catalysts

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Article information


Submitted
30 Mar 2020
Accepted
09 May 2020
First published
11 May 2020

Catal. Sci. Technol., 2020, Advance Article
Article type
Communication

Pushing the limits of activity and stability: the effects of Lewis acids on non-heme iron–NHC epoxidation catalysts

F. Dyckhoff, J. F. Schlagintweit, R. M. Reich and F. E. Kühn, Catal. Sci. Technol., 2020, Advance Article , DOI: 10.1039/D0CY00631A

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