Bioorganic & medicinal chemistry letters 2016 06 2526(16) 4101-5 doi 10.1016/j.bmcl.2016.06.065
A library of 585 compounds built off a 7-azaindole core was evaluated for anti-HIV-1 activity, and ten hits emerged with submicromolar potency and therapeutic index >100. Of these, three were identified as non-nucleoside reverse transcriptase (RT) inhibitors and were assayed against relevant resistant mutants. Lead compound 8 inhibited RT with submicromolar potency (IC50=0.73μM) and also maintained some activity against the clinically important RT mutants K103N and Y181C (IC50=9.2, 3.5μM) in cell-free assays. Free energy perturbation guided lead optimization resulted in the development of a compound with a two-fold increase in potency against RT (IC50=0.36μM). These data highlight the discovery of a unique scaffold with the potential to move forward as next-generation anti-HIV-1 agents.