N-Formylation of Amines with CO2 and H2 by Using NHC-Iridium Coordination Assemblies as Solid Molecular Catalysts

Chem Asian J. 2018 Oct 18;13(20):3018-3021. doi: 10.1002/asia.201800953. Epub 2018 Aug 7.

Abstract

One of the NHC-iridium coordination assemblies containing 1,5-cyclooctadiene (COD) and iodide ion has been demonstrated as robust, efficient, recyclable solid molecular catalyst for N-formylation of diverse primary and secondary amines with CO2 and H2 under mild reaction conditions. Remarkably, in the case of N,N-dimethylformamide production, even at 0.1 mol % catalyst loading under solvent-free conditions, the solid catalyst can be readily recovered by simply filtration and reused more than 10 runs without noticeable loss of activity.

Keywords: N-formylation; carbon dioxide transformation; coordination assembly; hydrogenation; iridium.