Catalysis of CC-coupling reactions by cyclopropenylidene palladium complexes
作者:Wolfgang A. Herrmann、Karl Öfele、Christian Taubmann、Eberhardt Herdtweck、Stephan D. Hoffmann
DOI:10.1016/j.jorganchem.2007.04.050
日期:2007.8
Several mixed palladium(II) complexes bearing 2,3-diarylcyclopropenylidene ligands (aryl = phenyl, mesityl, naphthyl) and triaryland. trialkylphosphines have been prepared. Single crystal structure details of one of the dimeric chloro-bridged complexes as well as of two monomeric phosphine substituted complexes are presented and compared with appropriate structural features of similar 2,3-diaminocyclopropenylidene- and cycloheptatrienylidene complexes. The new complexes were tested as catalysts in Suzuki-Mijaura coupling reactions with bromo- and chloroarenes and their catalytic activity compared with that of analogous NHC- and cycloheptatrienylidene complexes. (c) 2007 Elsevier B.V. All rights reserved.