A facile Horner–Wadsworth–Emmons route to 2-quinolones

A Novel Approach to Substituted α-Carbamoyl Phosphonates: Useful Reagents for the Horner–Wadsworth–Emmons Olefination

α-Carbamoyl phosphonates are useful reagents for the Horner–Wadsworth–Emmons olefination of aldehydes en route to medicinally relevant polysubstituted acrylamides. A new synthetic approach to these reagents has been developed. The methodology relies on the microwave-promoted Wolff rearrangement of α-acyl-α-diazophosphonates with trapping of the ketene intermediate in situ with various amines.

A palladium-catalyzed intramolecular carbonylative annulation reaction for the synthesis of 4,5-fused tricyclic 2-quinolones

A new method for the synthesis of 4,5-fused tricyclic 2-quinolones via a palladium-catalyzed intramolecular carbonylative annulation reaction is described.