Selenium-ligated palladium(II) complexes as highly active catalysts for carbon-carbon coupling reactions: the Heck reaction.
Three selenium-ligated Pd(II) complexes were readily synthesized and shown to be extremely active catalysts for the Heck reaction of various aryl bromides, including deactivated and heterocyclic ones. The catalytic activity of the selenide-based Pd(II) complexes not only rivals but vastly outperforms that of the corresponding phosphorus and sulfur analogues. Practical advantages of the selenium-based catalysts include their straightforward synthesis and high activity in the absence of any additives as well as the enhanced stability of the selenide ligands toward air oxidation.
Department of Chemistry and Biochemistry, The Michael Faraday Laboratories, Northern Illinois University, DeKalb, Illinois 60115-2862, USA. qyao@niu.edu
Qingwei
Q
Yao
Elizabeth P
EP
Kinney
Chong
C
Zheng
D002384:Catalysis; D007202:Indicators and Reagents; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D009943:Organophosphorus Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry*; D012643:Selenium / Q000737:chemistry*
D007202:Indicators and Reagents; D009942:Organometallic Compounds; D009943:Organophosphorus Compounds; D010165:Palladium; D012643:Selenium