Synthesis and direct C2 functionalization of imidazolium and 1,2,4-triazolium N-imides

J Org Chem. 2014 Nov 7;79(21):10593-8. doi: 10.1021/jo501746u. Epub 2014 Oct 10.

Abstract

Pd-catalyzed direct C2 arylation and Cu-catalyzed direct one-pot alkynylation/intramolecular cyclization of azolium N-imides are reported. Various acetylenes, aryl iodides, and 1-alkyl substituents were examined. The mild protocol allows direct C2 arylation of azolium N-imides without the use of specialized reagents together with novel one-pot regioselective preparations of imidazole-pyrazolo and pyrazolo-1,2,4-triazole ring systems. The electronic properties of selected examples were examined by fluorescence spectroscopy.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Catalysis
  • Copper / chemistry
  • Imidazoles / chemical synthesis*
  • Imidazoles / chemistry
  • Imides / chemical synthesis*
  • Imides / chemistry
  • Molecular Structure
  • Palladium / chemistry
  • Pyrazoles / chemical synthesis*
  • Pyrazoles / chemistry
  • Stereoisomerism
  • Triazoles / chemical synthesis*
  • Triazoles / chemistry

Substances

  • Imidazoles
  • Imides
  • Pyrazoles
  • Triazoles
  • Palladium
  • Copper