a versatile synthesis route new 4-quinolone-based polycyclic system is described. TFA-catalyzed intramolccular reaction of N-unsubstituted quinolone-2-carboxylic acid amides gives structurally di-verse compounds, depending on the length of the chain. acid treament of .... ,due to the nucleophilic attack of N-1 to the carbonyl group, whereas TFA treament of .... to the formation of tetracyclic compounds by a tandem heteroannulation reaction.