Modular routes towards new N,O-bidentate ligands containing an electronically delocalised β-enaminone chelating backbone

Abstract

Polyketones are synthesised by a transition-metal-catalysed copolymerisation of olefins and carbon monoxide. Nickel complexes with N,O-chelating ligands turned out to be promising catalysts in that field. In this work a series of new N,O ligands with an electronically delocalised β-enaminone backbone were synthesised and fully characterised. The ligand design was inspired by the ligand found in the most efficient nickel catalyst for polyketone synthesis and developed to a highly modular LEGO®-like arsenal of reactions to versatile substituted β-enaminone ligands. © Wiley-VCH Verlag GmbH & Co. KGaA, 2008.