Copper Mediated Intramolecular vs. Intermolecular Oxygenations: The Spacer makes the Difference!

European Journal of Inorganic Chemistry, vol. 2022

Abstract

Abstract Copper complexes in combination with dioxygen are important as potential catalytic systems for regio‐ and stereoselective aerobic oxygenations of aromatic and aliphatic C−H bonds at ambient temperatures. In that context we herein describe a copper(I) complex with an imine ligand derived from (+)‐camphor and 2‐(2‐aminoethyl)pyridine that forms a bis(μ‐hydroxido) dicopper complex upon reaction with dioxygen at room temperature. It is detectable by UV‐vis for several hours up to a few days, depending on the solvent and could be structurally characterized. In contrast to previous observations this complex rather oxygenates acetone or thioanisole as external substrates instead of undergoing an intramolecular ligand hydroxylation.

Authors 5

1. Alexander Petrillo

   Justus-Liebig-Universität Gießen

   Affiliation as printed

   Institute of Inorganic and Analytical Chemistry Justus-Liebig-University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany

   Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany

2. Alexander Hoffmann Aachen Institute of Inorganic Chemistry

   RWTH Aachen University

   Affiliation as printed

   Institute of Inorganic Chemistry RWTH Aachen University Landoltweg 1a 52074 Aachen Germany

   Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany

3. Jonathan Becker

   Justus-Liebig-Universität Gießen

   Affiliation as printed

   Institute of Inorganic and Analytical Chemistry Justus-Liebig-University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany

   Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany

4. Sonja Herres‐Pawlis Aachen Institute of Inorganic Chemistry

   RWTH Aachen University

   Affiliation as printed

   Institute of Inorganic Chemistry RWTH Aachen University Landoltweg 1a 52074 Aachen Germany

   Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany

5. Siegfried Schindler corresponding

   Justus-Liebig-Universität Gießen

   Affiliation as printed

   Institute of Inorganic and Analytical Chemistry Justus-Liebig-University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany

   Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany