Some novel pyrazole acyclonucleosides were prepared through binding of pyrazole-3, 5- substituted derivatives with acyclic substituents mimetizing individual fragments of the ribose ring such as: 1-[(2-hydroxyethoxy) methyl], 1-[4-(hydroxybutyl)], 1-[3-(hydroxypropyl)] and 1- [(2-hydroxyethyl amino) methyl]. Their syntheses were performed from easily accessible starting materials. The prepared compounds were evaluated for their antibacterial activity. ...