Synthesis of 4-azasteroids by an intramolecular Ugi reaction

Steroids. 2008 Nov;73(12):1270-6. doi: 10.1016/j.steroids.2008.06.002. Epub 2008 Jun 21.

Abstract

In this paper we report the use of an intramolecular Ugi reaction to synthesize new 4-azacholestanes diversely substituted both at N-4 and C-5. Both the scope and the stereochemical outcome of this approach were studied by varying the nature of the components necessary for this multicomponent reaction. In sight of our results we concluded that this methodology can be applied to obtain 4-azasteroids targeted to find new biologically active compounds.

MeSH terms

  • Azasteroids / chemical synthesis*
  • Azasteroids / chemistry
  • Magnetic Resonance Spectroscopy
  • Molecular Conformation
  • Spectrometry, Mass, Electrospray Ionization

Substances

  • Azasteroids