title: Synthesis of 4-azasteroids by an intramolecular Ugi reaction.
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.
authors.affiliation: Departamento de Química Orgánica and UMYMFOR (CONICET-Facultad de Ciencias Exactas y Naturales), Universidad de Buenos Aires, Pabellón 2, Piso 3, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina.
authors.forename: Fernando
authors.initials: F
authors.lastname: Alonso
authors.forename: Sofía L
authors.initials: SL
authors.lastname: Acebedo
authors.forename: Andrea C
authors.initials: AC
authors.lastname: Bruttomesso
authors.forename: Javier A
authors.initials: JA
authors.lastname: Ramírez
mesh_terms: D001378:Azasteroids / Q000138:chemical synthesis* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D001378:Azasteroids