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Download fileSynthesis and Characterization of N-Heterocyclic Carbene Phospha-Palladacycles and Their Properties in Heck Catalysis†
journal contribution
posted on 2005-08-29, 00:00 authored by Guido D. Frey, Jan Schütz, Eberhardt Herdtweck, Wolfgang A. HerrmannPalladacycles are among the most active catalyst systems for the Mizoroki−Heck reaction
to date. We present N-heterocyclic carbene (NHC) substituted phospha-palladacycles as a
new class of catalysts. This new type of palladacycles combines the advantageous stability
of phospha-palladacycles with the steric demand and high σ-donor strength of N-heterocyclic
carbenes. In this work NHC-substituted phospha-palladacycles are tested in Heck catalysis.
The activity of these catalysts allows the coupling of even aryl chlorides in good yields.