Synthesis of nitrogen analogues of naturally occurring pyranonaphtopquinones, 2-aza-antraquinones en related compounds. Asymmetric synthesis of target compounds (trans-dihydroxymollugin viaepoxides, cis-dihydroxymollugin and isagarin via asymmetric dihydroxylation). Oxidation protocols based on cerium(IV) ammonium nitrate. Bio-activity tests, screening for antifungal and antitubercular activities.