Photoassisted oxidation of ruthenium(II)-photocatalysts Ru(bpy)3(2+) and Ru(bpz)3(2+) to RuO4: orthogonal tandem photoredox and oxidation catalysis

Dirk Alpers; Malte Gallhof; Christian B W Stark; Malte Brasholz

doi:10.1039/c5cc08994h

Photoassisted oxidation of ruthenium(II)-photocatalysts Ru(bpy)3(2+) and Ru(bpz)3(2+) to RuO4: orthogonal tandem photoredox and oxidation catalysis

Chem Commun (Camb). 2016 Jan 18;52(5):1025-8. doi: 10.1039/c5cc08994h.

Authors

Dirk Alpers¹, Malte Gallhof¹, Christian B W Stark¹, Malte Brasholz¹

Affiliation

¹ University of Hamburg, Department of Chemistry - Institute of Organic Chemistry, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany. malte.brasholz@chemie.uni-hamburg.de.

PMID: 26592543
DOI: 10.1039/c5cc08994h

Abstract

Common photoredox catalysts Ru(bpy)3(2+) and Ru(bpz)3(2+) are rapidly converted into Ruthenium(viii)-oxide through continuous visible light irradiation in the presence of NaIO4 or H5IO6. This hitherto unreported photoassisted catalyst oxidation was utilized in the development of tandem catalytic protocols which combine a photoredox reaction with a subsequent RuO4-mediated oxidation. The new concept was demonstrated through one-pot radical cation Diels-Alder (RCDA)/1,5-diene cyclisation sequences.

Publication types

Research Support, Non-U.S. Gov't