Search results for "n-heterocyclic carbine"

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STABILITY AND ORGANOCATALYTIC EFFICIENCY OF N-HETEROCYCLIC CARBENES ELECTROGENERATED IN ORGANIC SOLVENTS FROM IMIDAZOLIUM IONIC LIQUIDS

2015

The kinetic of degradation of 1-butyl-3-methylimidazole-2-ylidene (selected as model N-heterocyclic carbene - NHC), generated in organic solvents by cathodic reduction of the parent 1-butyl-3- methylimidazolium salts BMIm-X, was studied by a simple voltammetric analysis. The effect of NHC degradation rate on the efficiency of an organocatalyzed reaction (the synthesis of g-butyrolactone from cinnamaldehyde and trifluoromethylacetophenone) was investigated. The nature of the solvent and of the anion X have a remarkable effect on the stability of the NHC, the bis(trifluoromethylsulfonyl) imide anion being the best for a long lasting carbene (while acetonitrile seems to be the worst solvent). …

n-heterocyclic carbinen-heterocyclic carbeneHydrogen bondanion effect; cyclic voltammetry; ionic liquid; n-heterocyclic carbene; n-heterocyclic carbine; organocatalysisGeneral Chemical EngineeringSettore CHIM/06 - Chimica Organicacyclic voltammetryCinnamaldehydeSolventchemistry.chemical_compoundchemistryOrganocatalysisPolymer chemistryIonic liquidElectrochemistryOrganic chemistryorganocatalysiscyclic voltammetry N-heterocyclic carbene organocatalysis ionic liquid anion effectImideAcetonitrileCarbeneanion effectionic liquid
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