Synthesis and Characterization of N-Heterocyclic Carbene Phospha-Palladacycles and Their Properties in Heck Catalysis
摘要:
Palladacycles 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 a-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.
Synthesis and Characterization of <i>N</i>-Heterocyclic Carbene Phospha-Palladacycles and Their Properties in Heck Catalysis
作者:Guido D. Frey、Jan Schütz、Eberhardt Herdtweck、Wolfgang A. Herrmann
DOI:10.1021/om049001g
日期:2005.8.1
Palladacycles 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 a-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.