Annulated N-heterocyclic carbene ligands derived from 2-methylaminopiperidine: Their complexes and catalytic applications

Tuerkmen H. , PAPE T., HAHN F. E. , CETINKAYA B.

ORGANOMETALLICS, vol.27, no.4, pp.571-575, 2008 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 4
  • Publication Date: 2008
  • Doi Number: 10.1021/om701105y
  • Title of Journal : ORGANOMETALLICS
  • Page Numbers: pp.571-575

Abstract

A new type of carbene precursor, 1,5,6,7,8,8a-hexahydroimidazo[1,5-a]pyridine (1), has been prepared from 2-(aminomethyl)piperidine and N,N-dimethylformamide dimethylacetal. The reactions of three imidazolidinium salts with [Rh(acac)(COD)] and [Ir(u-OMe)(COD)](2) were found to afford rhodium and iridium complexes of N-heterocyclic carbenes, respectively. These complexes have been tested as catalysts in the transfer hydrogenation of cyclohexanone and acetophenone using 2-propanol as hydrogen source.