The growing importance of functionalized tricyclic rings, eg, cyclopropyl and aziridine, in numerous organic biomolecules led us to develop syntheses of novel actinomycin D (AMD) analogues substituted with aziridine and cyclopropyl functions. Reaction of 7- hydroxyactinomycin D with 1-aziridmeethyl iodide and bromomethylcyclopropane afforded the desired 7424 1-aziridiny1) ethoxyl and cyclopropylmethoxy analogues, respectively. ...