Evidence that SCS pincer Pd(II) complexes are only precatalysts in Heck catalysis and the implications for catalyst recovery and reuse

Kunquan Yu, William Sommer, John M. Richardson, Marcus Weck, Christopher W. Jones

Research output: Contribution to journalArticlepeer-review

Abstract

SCS-pincer Pd(II) complexes have been covalently immobilized onto porous silica, cross-linked polymer (Merrifield resin) and soluble poly(norbornene) supports via either amide or urea linkages and evaluated in the Heck coupling of iodobenzene with n-butyl acrylate. Kinetic experiments and poisoning studies indicate that in all cases the pincer complexes merely act as precatalysts. Contrary to literature reports, there is no evidence for catalysis by the intact amide-linked SCS-Pd(II) complexes under any conditions studied here.

Original languageEnglish (US)
Pages (from-to)161-171
Number of pages11
JournalAdvanced Synthesis and Catalysis
Volume347
Issue number1
DOIs
StatePublished - Jan 2005

Keywords

  • Biphasic catalysis
  • Heck reaction
  • Immobilization
  • Leaching
  • Palladium
  • Pincer complex

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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