NHC Pdii complexes for the solvent-free telomerisation of isoprene with methanol
Sergey A. Rzhevskiy, Maxim A. Topchiy, Vasilii N. Bogachev, Alexandra A. Ageshina, Lidiya I. Minaeva, Grigorii K. Sterligov, Mikhail S. Nechaev, Andrey F. Asachenko
Abstract
A comparative study of N-heterocyclic carbene Pd complexes in the head-to-head isoprene telomerization with methanol revealed significant impact of ligand structure as well as axial group structure on the catalyst activity. Some N,N'-diaryl substituted imidazol-2-ylidene, imidazolidin-2-ylidene and expanded-ring tetrahydropyrimidin-2-ylidene and tetrahydrodiazepin-2-ylidene based ligands were tested to explore the fundamental correlations between structure (ring carbene size along with the substituent sterical and electronic properties) and catalytic activity.
Topics & Concepts
ChemistryIsopreneTelomerizationCarbeneMethanolSubstituentCatalysisLigand (biochemistry)Ring (chemistry)Medicinal chemistrySolventPalladiumPolymer chemistryStereochemistryOrganic chemistryReceptorCopolymerBiochemistryPolymerN-Heterocyclic Carbenes in Organic and Inorganic ChemistryCatalytic Cross-Coupling ReactionsSynthetic Organic Chemistry Methods