Condensed Heteroaromatic Ring Systems. IV. Synthesis of Naphthyridine Derivatives by Cyclization of Aminopyridineacrylic Esters
The reaction of aminohalopyridines with ethyl acrylate in the presence of palladium(II)acetate and triarylphosphine gave ethyl aminopyridineacrylates.The cyclization of the resulting acrylates under basic conditions gave naphthyridinones having a carbostyril-type moiety.Keywords- intramolecular cyclization; palladium catalyst; ethyl acrylate; naphthyridinone; pyridineacrylic ester