title: Synthesis and biological evaluation of some acyclic alpha-(1H-pyrazolo-[3,4-d]pyrimidin-4-yl)thioalkylamide nucleosides.
abstract: The chemical synthesis of some acyclic alpha-(1H-pyrazolo[3,4-d]pyrimidin-4-yl)thioalkylamide nucleosides (10-12)a-c is described. The treatment of IH-pyrazolo[3,4-d]pyrimidin-4-thione 1 with compounds 2a-c gave, regioselectively, ethyl alpha-(1H-pyrazolo[3,4-d]pyrimidin-4-yl)thioalkylates 3a-c, respectively. These heterocycles were alkylated, separately, with alkylating agents 4, 5 and 6 to give, regioselectively, the N1-acyclic nucleosides (7-9)a-c which were deprotected to afford the desired products (10-12)a-c. All synthetic compounds were characterized on the basis of their physical and spectroscopic properties. The products (10-12)a-c were evaluated for their inhibitory effects against the replication of HIV-1 (III(B)), HIV-2 (ROD), various DNA viruses, a variety of tumor-cell lines and M. tuberculosis. No marked biological activity was found.
authors: Laboratoire de Chimie Bio-Organique, Faculté des Sciences, Agadir, Maroc.
authors: O
authors: O
authors: Moukha-chafiq
authors: M L
authors: ML
authors: Taha
authors: H B
authors: HB
authors: Lazrek
authors: J J
authors: JJ
authors: Vasseur
authors: E
authors: E
authors: De Clercq
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000494:pharmacology; D002522:Chlorocebus aethiops; D004354:Drug Screening Assays, Antitumor; D008826:Microbial Sensitivity Tests; D009705:Nucleosides / Q000138:chemical synthesis* / Q000737:chemistry; D011720:Pyrazoles / Q000737:chemistry* / Q000494:pharmacology; D011743:Pyrimidines / Q000737:chemistry* / Q000494:pharmacology; D014407:Tumor Cells, Cultured; D014709:Vero Cells
chemical_list: D000998:Antiviral Agents; D009705:Nucleosides; D011720:Pyrazoles; D011743:Pyrimidines; C014175:pyrazolo(3,4-d)pyrimidine