S-DABO derivatives containing the methylthiomethyl (MTM) group have been sy
nthesized and tested for anti-HIV-1 activity in cell-based assay (MTT and p
24 assays) and for their capability to target the HIV-1 reverse transcripta
se in enzyme assays. Data of experiments lead to the conclusion that the in
troduction of a 2-MTM-thio side chain is not sufficient per se to significa
ntly increase S-DABO's potency. Nevertheless, potent MTM-S-DABOs can be obt
ained by introducing a 2,6- difluorophenylmethyl moiety as a C-6 substituen
t.