Amine-functionalized bifunctional CoIII-NHC complexes: highly effective phosphine-free catalysts for the α-alkylation of nitriles

Abstract

Newly developed amine functionalized NHC-supported Co^III-complexes have been identified as highly effective bifunctional catalysts for the α-alkylation of nitriles using a plethora of alcohols, ranging from aliphatic to aromatic and intriguingly, also secondary ones. Comparison of their activities with the non-bifunctional analogues uncovered their extremely high activities although possessing the high-valent Co^III-center due to metal–ligand cooperativity, which has been established by an array of control experiments.