3-Hydroxypyrimidine-2,4-dione-5-N-benzylcarboxamides Potently Inhibit HIV-1 Integrase and RNase H

J Med Chem. 2016 Jul 14;59(13):6136-48. doi: 10.1021/acs.jmedchem.6b00040. Epub 2016 Jun 17.

Abstract

Resistance selection by human immunodeficiency virus (HIV) toward known drug regimens necessitates the discovery of structurally novel antivirals with a distinct resistance profile. On the basis of our previously reported 3-hydroxypyrimidine-2,4-dione (HPD) core, we have designed and synthesized a new integrase strand transfer (INST) inhibitor type featuring a 5-N-benzylcarboxamide moiety. Significantly, the 6-alkylamino variant of this new chemotype consistently conferred low nanomolar inhibitory activity against HIV-1. Extended antiviral testing against a few raltegravir-resistant HIV-1 clones revealed a resistance profile similar to that of the second generation INST inhibitor (INSTI) dolutegravir. Although biochemical testing and molecular modeling also strongly corroborate the inhibition of INST as the antiviral mechanism of action, selected antiviral analogues also potently inhibited reverse transcriptase (RT) associated RNase H, implying potential dual target inhibition. In vitro ADME assays demonstrated that this novel chemotype possesses largely favorable physicochemical properties suitable for further development.

MeSH terms

  • Cell Line
  • Drug Resistance, Viral
  • HIV Infections / drug therapy*
  • HIV Infections / virology
  • HIV Integrase / metabolism
  • HIV Integrase Inhibitors / chemistry
  • HIV Integrase Inhibitors / pharmacology*
  • HIV-1 / drug effects*
  • HIV-1 / enzymology*
  • HIV-1 / physiology
  • Heterocyclic Compounds, 3-Ring / pharmacology
  • Humans
  • Models, Molecular
  • Oxazines
  • Piperazines
  • Pyridones
  • Pyrimidinones / chemistry
  • Pyrimidinones / pharmacology*
  • Raltegravir Potassium / pharmacology
  • Ribonuclease H / antagonists & inhibitors*
  • Ribonuclease H / metabolism

Substances

  • HIV Integrase Inhibitors
  • Heterocyclic Compounds, 3-Ring
  • Oxazines
  • Piperazines
  • Pyridones
  • Pyrimidinones
  • Raltegravir Potassium
  • dolutegravir
  • HIV Integrase
  • Ribonuclease H
  • p31 integrase protein, Human immunodeficiency virus 1