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  • Title: Tricyclic nucleoside analogues as antiherpes agents.
    Author: Golankiewicz B, Ostrowski T.
    Journal: Antiviral Res; 2006 Sep; 71(2-3):134-40. PubMed ID: 16780965.
    Abstract:
    Tricyclic (T) guanine analogues are a class of compounds in which the N1 and N(2) atoms of the guanine system are linked by etheno bridge to form the 3,9-dihydro-9-oxo-5H-imidazo[1,2-a]purine system. Almost 70 tricyclic derivatives of guanine-type potent antiherpetic agents acyclovir (ACV), ganciclovir (GCV) and 9-{[cis-1',2'-bis(hydroxymethyl)cycloprop-1'-yl]methyl}guanine were synthesized and evaluated for activity against viruses of the herpes family. Here, we review the most successful compounds in terms of their antiviral activity and physico-chemical properties. These features are modulated by the kind and position of additional substituents present in the appended third ring of aglycone. The best antiherpetic activity-fluorescence combinations as well as activity of compounds in comparison to parent congeners are summarized. The data presented indicate that compounds of the 6-(4-RPh) family are of particular importance because of their advantageous antiviral potency, increased lipophilicity and good or moderate fluorescence properties.
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