5-Alkyl-6-benzyl-2-(2-oxo-2-phenylethylsulfanyl)pyrimidin-4(3<i>H</i>)-ones, a Series of Anti-HIV-1 Agents of the Dihydro-alkoxy-benzyl-oxopyrimidine Family with Peculiar Structure−Activity Relationship Profile
作者:Maxim B. Nawrozkij、Dante Rotili、Domenico Tarantino、Giorgia Botta、Alexandre S. Eremiychuk、Ira Musmuca、Rino Ragno、Alberta Samuele、Samantha Zanoli、Mercedes Armand-Ugón、Imma Clotet-Codina、Ivan A. Novakov、Boris S. Orlinson、Giovanni Maga、José A. Esté、Marino Artico、Antonello Mai
DOI:10.1021/jm800340w
日期:2008.8.1
A series of dihydro-alkylthio-benzyl-oxopyrimidines (S-DABOs) bearing a 2-aryl-2-oxoethylsulfanyl chain at pyrimidine C2, an alkyl group at C5, and a 2,6-dichloro-, 2-chloro-6-fluoro-, and 2,6-difluoro-benzyl substitution at C6 (oxophenethyl-S-DABOs, 6-8) is here described. The new compounds showed low micromolar to low nanomolar (in one case subnanomolar) inhibitory activity against wt HIV-1. Against clinically relevant HIV-1 mutants (K103N, Y181C, and Y188L) as well as in enzyme (wt and K103N, Y181I, and L1001 mutated RTs) assays, compounds carrying an ethylliso-propyl group at C5 and a 2,6-dichloro-/2-chloro-6-fluoro-benzyl moiety at C6 were the most potent derivatives, also characterized by low fold resistance ratio. Interestingly, the structure-activity relationship (SAR) data drawn from this DABO series are more related to HEPT than to DABO derivatives. These findings were at least in part rationalized by the description of a fair superimposition between the 6-8 and TNK-651 (a HEPT analogue) binding modes in both WT and Y181C RTs.