Synthesis and antibacterial activity of some fused and spiro imidazolidinederivatives

A simple and efficient method for the synthesis of a new series of isatylid ene, quinoline and benzazepine derivatives by condensation of imidazolidine -2,5-diones with indol-2,3-diones is described. Under normal conditions it afforded 3',2'-dihydro-3[2'-imidazolidine] indol-2'-one and 2',3'-dihydro-s piro [diimidazolo {4,5-e; 4,5-b} pyran-8',3-indol]-2'-one whereas under bas ic conditions 4,5-dioxo-imidazolo {5,4-b} benzazepine and imidazolo {5,4-b} quinolin-4-carboxylic acid was obtained. Structural elucidation has been d one on the basis of elemental analysis, IR and H-1 NMR spectral data.