Amidinohydrazones as guanidine bioisosteres: application to a new class of potent, selective and orally bioavailable, non-amide-based small-molecule thrombin inhibitors

Bioorg Med Chem Lett. 2000 Jan 3;10(1):1-4. doi: 10.1016/s0960-894x(99)00632-0.

Abstract

We describe a new class of potent, non-amide-based small molecule thrombin inhibitors in which an amidinohydrazone is used as a guanidine bioisostere on a non-peptide scaffold. Compound 4 exhibits nM inhibition of thrombin, is selective for thrombin, and shows 60 and 23% bioavailability in rabbits and dogs, respectively. Crystallographic analysis of 4 bound to thrombin confirmed the amindinohydrazone binding mode.

Publication types

  • Comparative Study

MeSH terms

  • Administration, Oral
  • Amidines / chemical synthesis
  • Amidines / chemistry*
  • Amidines / pharmacokinetics
  • Amidines / pharmacology*
  • Animals
  • Binding Sites
  • Biological Availability
  • Crystallography, X-Ray
  • Dogs
  • Fibrinolytic Agents / chemical synthesis
  • Fibrinolytic Agents / chemistry*
  • Fibrinolytic Agents / pharmacokinetics
  • Fibrinolytic Agents / pharmacology*
  • Guanidines / chemical synthesis
  • Guanidines / chemistry*
  • Guanidines / pharmacokinetics
  • Guanidines / pharmacology*
  • Kinetics
  • Rabbits
  • Serine Proteinase Inhibitors / pharmacology
  • Structure-Activity Relationship
  • Substrate Specificity
  • Thrombin / antagonists & inhibitors*
  • Trypsin Inhibitors / pharmacology

Substances

  • Amidines
  • Fibrinolytic Agents
  • Guanidines
  • Serine Proteinase Inhibitors
  • Trypsin Inhibitors
  • Thrombin