Non-precious metal carbamates as catalysts for the aziridine/CO<sub>2</sub> coupling reaction under mild conditions
Giulio Bresciani, Stefano Zacchini, Fabio Marchetti, Guido Pampaloni
Abstract
The catalytic potential of a large series of easily available metal carbamates (based on thirteen different non-precious metal elements) was explored for the first time in the coupling reaction between 2-aryl-aziridines and carbon dioxide, working under solventless and ambient conditions and using tetraalkylammonium halides as co-catalysts. The straightforward synthesis of novel [NbCl3(O2CNEt2)2], NbCl, and [NbBr3(O2CNEt2)2], NbBr, is reported. The niobium complex NbCl, in combination with NBu4I, emerged as the best catalyst of the overall series to convert aziridines with small N-alkyl substituents into the corresponding 5-aryl-oxazolidin-2-ones.
Topics & Concepts
AziridineCatalysisArylChemistryCoupling (piping)MetalHomogeneousCoupling reactionOxidative coupling of methaneInorganic chemistryOrganic chemistryMaterials scienceMetallurgyPhysicsThermodynamicsAlkylRing (chemistry)Carbon dioxide utilization in catalysisAsymmetric Hydrogenation and CatalysisCO2 Reduction Techniques and Catalysts