Acyclic Nucleoside and Nucleotide Analogues with Amide Bond
摘要:
A series of acyclic nucleosides and related alpha-phosphonyl acyclic analogues of dNTP with an amide bond have been prepared. Their antiviral and substrate properties were investigated.New acyclic nucleoside analogues with a rigid structural element, amide bond, have been synthesized in two stages. Alkylation of bis- trimethylsilylated thymine, cytosine and sodium salt of adenine by ethyl bromoacetate gave ethoxycarbonylmethyl derivatives ($) under bar 1a-c. Reaction of ($) under bar 1a-c with aminoalcohols afforded acyclic nucleosides ($) under bar 2-($) under bar 4 in good yields (Scheme 1), These analogues were found to be inactive against HIV-1 (CEM-SS cells) and HSV -1, HSV-2, HCMV, VZV (HFF cells) at concentrations up to 100 mu g/ml and were nontoxic towards CEM and HFF cells. However, it was shown that triphosphate of ($) under bar 2c is incorporated into the DNA chain by DNA polymerase from HSV-1(1). The absence of antiviral activity and cytotoxicity is probably due to the fact that ($) under bar 2-($) under bar 4 are not recognized by cellular and viral kinases.