Chlorination and ortho-acetoxylation of 2-arylbenzoxazoles

Org Biomol Chem. 2011 Jul 21;9(14):5288-96. doi: 10.1039/c1ob05223c. Epub 2011 Jun 7.

Abstract

Efficient and facile catalytic protocols for chlorination and ligand-directed ortho-acetoxylation of 2-arylbenzoxazoles have been developed. The chlorination is not a ligand-directed ortho-functionalization, but an electrophilic substitution process in the benzo ring of the benzoxazole moiety. Meanwhile, the acetoxylation exhibited high regioselectivity for the substrates containing a meta-substituent and occurred at the less sterically hindered ortho-C-H bond of the directing group.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Benzoxazoles / chemical synthesis*
  • Benzoxazoles / chemistry
  • Halogenation
  • Ligands
  • Magnetic Resonance Spectroscopy / standards
  • Molecular Structure
  • Reference Standards
  • Stereoisomerism

Substances

  • Benzoxazoles
  • Ligands