title: Synthesis and activity against HBV of novel Tetra-seconucleoside analogues of dyphlline having the acyclic chains of ACV and HBG.
abstract: Selective alkylation of dyphylline (1) with (2-acetoxyethoxy)methyl bromide (2a) or 4-acetoxybutyl bromide (2b) afforded 3'-O-[(acetoxyethoxy)methyl]dyphylline (3a) and 3'-O-(4-acetoxybutyl)-dyphylline (3b), respectively. A trans esterification process rather than alkylation of the dihydroxy-propyl side chain in 1 had taken place during the reaction with 2-p-toluoyloxy)ethyl chloride (5) to afford the respective 3'-toluoyloxy derivative 7 and not the anticipated 3'-O-[(p-toluoyloxy)ethyl]-dyphylline (6). Deacylation of 3a,b and 7 afforded 4a,b and 1, respectively. Viral screening of selected compounds against HBV has been investigated.
authors.affiliation: Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt. Eelsahry60@hotmail.com
authors.forename: El Sayed H
authors.initials: el SH
authors.lastname: El Ashry
authors.forename: Laila F
authors.initials: LF
authors.lastname: Awad
authors.forename: Nagwa
authors.initials: N
authors.lastname: Rashed
authors.forename: Adel
authors.initials: A
authors.lastname: Abdelrahman
authors.forename: Hana A
authors.initials: HA
authors.lastname: Rasheed
mesh_terms: D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D045744:Cell Line, Tumor; D004400:Dyphylline / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D006515:Hepatitis B virus / Q000187:drug effects*; D006801:Humans
chemical_list: D000998:Antiviral Agents; D004400:Dyphylline