title: Antiviral activity of triazine analogues of 1-(S)-[3-hydroxy-2-(phosphonomethoxy)propyl]cytosine (cidofovir) and related compounds.
abstract: Treatment of 5-azacytosine sodium salt with diisopropyl [(2-chloroethoxy)methyl]phosphonate followed by removal of ester groups with BrSi(CH3)3 afforded 1-[2-(phosphonomethoxy)ethyl]-5-azacytosine (3). Reaction of 5-azacytosine with [(trityloxy)methyl]-(2S)-oxirane followed by etherification with diisopropyl (bromomethyl)phosphonate and removal of ester groups gave 1-(S)-[3-hydroxy-2-(phosphonomethoxy)propyl]-5-azacytosine (1). The synthesis of 6-azacytosine congener 2 was analogous using N4-benzoylated intermediates. Compound 1 was shown to exert strong activity against a broad spectrum of DNA viruses including adenoviruses, poxviruses, and herpesviruses (i.e., herpes simplex viruses, varicella zoster virus, and human cytomegalovirus). Decomposition of 1 in alkaline solutions resulted in products 17 and 18. While the N-formylguanidine derivative 17 proved active, the carbamyolguanidine derivative 18 was devoid of antiviral activity.
authors.affiliation: Gilead Sciences & IOCB Research Centre, Centre for New Antivirals and Antineoplastics (IOCB), Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic. marcela@uochb.cas.cz
authors.forename: Marcela
authors.initials: M
authors.lastname: Krecmerová
authors.forename: Antonín
authors.initials: A
authors.lastname: Holý
authors.forename: Alois
authors.initials: A
authors.lastname: Pískala
authors.forename: Milena
authors.initials: M
authors.lastname: Masojídková
authors.forename: Graciela
authors.initials: G
authors.lastname: Andrei
authors.forename: Lieve
authors.initials: L
authors.lastname: Naesens
authors.forename: Johan
authors.initials: J
authors.lastname: Neyts
authors.forename: Jan
authors.initials: J
authors.lastname: Balzarini
authors.forename: Erik
authors.initials: E
authors.lastname: De Clercq
authors.forename: Robert
authors.initials: R
authors.lastname: Snoeck
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D002460:Cell Line; D002522:Chlorocebus aethiops; D000077404:Cidofovir; D003596:Cytosine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D004267:DNA Viruses / Q000187:drug effects; D006801:Humans; D051379:Mice; D063065:Organophosphonates / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D012328:RNA Viruses / Q000187:drug effects; D012190:Retroviridae / Q000187:drug effects; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D014227:Triazines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000998:Antiviral Agents; D063065:Organophosphonates; D014227:Triazines; D003596:Cytosine; D000077404:Cidofovir