Synthesis of multi-functionalized 1-azabicycles through MAOS acid catalyzed formal aza-[3+3] cycloaddition of heterocyclic enaminones with oxazolones
Keywords: Indolizidinones; Quinolizidinones; Erlenmeyer-Plöchl azalactones; Bi(NO3)3·5H2O; Microwave heating;