Novel phosphonate compounds were synthesized via Michael addition of N-heteroaromatic
compounds to aryl- and alkyl-substituted vinylphosphonates using scandium triflate
as the catalyst. Intramolecular cyclization reaction of the Michael adducts obtained
gives novel (dimethoxyphosphoryl)pyrrolizin-3-ones in high yields as a single diastereomer.
Key words
phosphonates - pyrrolizinones - Michael addition - metal triflates - heteroaromatic
compounds