Synthesis of a series of novel rac-(1 R,4 R,6 R,6a R)-6′-phenyl-7′,8′-dihydro-1″ H,2′ H,6′ H-dispiro[cycloalkane-1,5′-pyrrolo[1,2- c][1,3]thiazole-4′,3″-indole]-2,2″-diones by cycloaddition reaction is described. The nonstabilised azomethine ylide generated by the reaction of isatin and thiazolidine-2-carboxylic acid has been regioselectively trapped by various substituted benzylidene cycloalkanones.