A versatile new synthetic route to 1N-hydroxyindazoles

Org Lett. 2009 Nov 5;11(21):5078-81. doi: 10.1021/ol902085k.

Abstract

A new and versatile cyclization reaction affording rare 1N-hydroxyindazoles is presented. Treatment of 2-nitrobenzylamines with methanolic sodium hydroxide furnishes 1N-hydroxyindazoles regioselectively and in high yield. The reaction tolerates a range of functional groups and electronic effects.

MeSH terms

  • Benzylamines / chemistry*
  • Catalysis
  • Combinatorial Chemistry Techniques
  • Cyclization
  • Indazoles / chemical synthesis*
  • Indazoles / chemistry
  • Molecular Structure
  • Stereoisomerism

Substances

  • Benzylamines
  • Indazoles
  • benzylamine