The synthesis and evaluation of some 2-substituted-1, 4-naphthoquinones 2, S-(1, 4- naphthoquinon-2-yl)-mercaptoalkanoic acid amides 4, related benzoquinone and naphthoquinone derivatives 6–9 and 2, 3-disubstituted 1, 4-naphthoquinones 10–11 were carried out. The antifungal, antibacterial, antiviral and anticancer activities were determined by using the standard assay. The results show that compounds 2b and 10a showed in ...