Novel synthesis of 3-substituted 2,3-dihydrobenzofurans via ortho-quinone methide intermediates generated in situ

Org Lett. 2014 Mar 7;16(5):1478-81. doi: 10.1021/ol500290e. Epub 2014 Feb 26.

Abstract

A new method is presented for the regioselective one-pot synthesis of 3-substituted 2,3-dihydrobenzofurans from 2-bromo-1-{2-[(triisopropylsilyl)oxy]phenyl}ethyl nitrate by fluoride-induced desilylation leading to o-quinone methide generation, Michael addition of different C, N, O, and S nucleophiles, and intramolecular 5-exo-tet elimination of a bromide anion. The method has potential synthetic applications in drug discovery.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Benzofurans / chemical synthesis*
  • Benzofurans / chemistry
  • Combinatorial Chemistry Techniques
  • Indolequinones / chemistry*
  • Molecular Structure
  • Organosilicon Compounds / chemistry*
  • Stereoisomerism

Substances

  • 2-bromo-1-(2-((triisopropylsilyl)oxy)phenyl)ethyl nitrate
  • Benzofurans
  • Indolequinones
  • Organosilicon Compounds
  • quinone methide