10-Hydroxy-7,8-dihydropyrazino[1',2':1,5]pyrrolo[2,3-d]pyridazine-1,9(2H,6H)-diones: potent, orally bioavailable HIV-1 integrase strand-transfer inhibitors with activity against integrase mutants

Bioorg Med Chem Lett. 2008 Aug 15;18(16):4581-3. doi: 10.1016/j.bmcl.2008.07.037. Epub 2008 Jul 15.

Abstract

A series of 10-hydroxy-7,8-dihydropyrazino[1',2':1,5]pyrrolo[2,3-d]pyridazine-1,9(2H,6H)-diones was synthesized and tested for their inhibition of HIV-1 replication in cell culture. Structure-activity studies indicated that high antiviral potency against wild-type virus as well as viruses containing integrase mutations that confer resistance to three different structural classes of integrase inhibitors could be achieved by incorporation of small aliphatic groups at certain positions on the core template. An optimal compound from this study, 16, inhibits integrase strand-transfer activity with an IC(50) value of 10 nM, inhibits HIV-1 replication in cell culture with an IC(95) value of 35 nM in the presence of 50% normal human serum, and displays modest pharmacokinetic properties in rats (i.v. t(1/2)=5.3 h, F=17%).

MeSH terms

  • Administration, Oral
  • Animals
  • Antiviral Agents / pharmacology
  • Biological Availability
  • Chemistry, Pharmaceutical / methods*
  • Drug Design
  • HIV Integrase / chemical synthesis*
  • HIV Integrase / pharmacology*
  • Humans
  • Inhibitory Concentration 50
  • Integrases / genetics*
  • Models, Chemical
  • Mutation*
  • Rats
  • Structure-Activity Relationship
  • Virus Replication

Substances

  • Antiviral Agents
  • HIV Integrase
  • Integrases