Photooxidizing chromium catalysts for promoting radical cation cycloadditions

Susan M Stevenson; Matthew P Shores; Eric M Ferreira

doi:10.1002/anie.201501220

Photooxidizing chromium catalysts for promoting radical cation cycloadditions

Angew Chem Int Ed Engl. 2015 May 26;54(22):6506-10. doi: 10.1002/anie.201501220. Epub 2015 Apr 14.

Authors

Susan M Stevenson¹, Matthew P Shores², Eric M Ferreira³

Affiliations

¹ Department of Chemistry, University of Georgia, Athens, GA 30602 (USA).
² Department of Chemistry, Colorado State University, Fort Collins, CO 80523 (USA). matthew.shores@colostate.edu.
³ Department of Chemistry, University of Georgia, Athens, GA 30602 (USA). emferr@uga.edu.

PMID: 25872770
DOI: 10.1002/anie.201501220

Abstract

The photooxidizing capabilities of selected Cr(III) complexes for promoting radical cation cycloadditions are described. These complexes have sufficiently long-lived excited states to oxidize electron-rich alkenes, thereby initiating [4+2] processes. These metal species augment the spectrum of catalysts explored in photoredox systems, as they feature unique properties that can result in differential reactivity from the more commonly employed ruthenium or iridium catalysts.

Keywords: chromium; cycloaddition; oxidation; photocatalysis; radical cations.