Copper-mediated hydroxylation of arenes and heteroarenes directed by a removable bidentate auxiliary

Org Lett. 2014 Aug 1;16(15):3904-7. doi: 10.1021/ol5016064. Epub 2014 Jul 16.

Abstract

A copper-mediated C-H hydroxylation of arenes and heteroarenes using our newly developed PIP directing group has been developed. This procedure is scalable and compatible with a wide range of functional groups and heteroarenes, providing an operationally simple protocol for the synthesis of o-hydroxybenzamides. The hydroxylation of nicotinamides gave 4-oxo-1,4-dihydropyridine-3-carboxamides selectively. Preliminary mechanistic studies implicate that a basic ligand-enabled, irreversible, rate-determining CMD step is most likely involved in this process.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Benzamides / chemical synthesis*
  • Benzamides / chemistry
  • Benzene Derivatives / chemistry*
  • Catalysis
  • Copper / chemistry*
  • Dihydropyridines
  • Hydroxylation
  • Ligands
  • Molecular Structure
  • Phenols

Substances

  • Benzamides
  • Benzene Derivatives
  • Dihydropyridines
  • Ligands
  • Phenols
  • Copper
  • 1,4-dihydropyridine