Discovery of 1-[2-(1-methyl-1H-pyrazol-5-yl)-[1,2,4]triazolo[1,5-a]pyridin-6-yl]-3-(pyridin-4-ylmethyl)urea as a potent NAMPT (nicotinamide phosphoribosyltransferase) activator with attenuated CYP inhibition

Bioorg Med Chem Lett. 2021 Jul 1:43:128048. doi: 10.1016/j.bmcl.2021.128048. Epub 2021 Apr 19.

Abstract

Nicotinamide phosphoribosyltransferase (NAMPT) catalyzes the rate-limiting step of the NAD+ salvage pathway. Since NAD+ plays a pivotal role in many biological processes including metabolism and aging, activation of NAMPT is an attractive therapeutic target for treatment of diverse array of diseases. Herein, we report the continued optimization of novel urea-containing derivatives which were identified as potent NAMPT activators. Early optimization of HTS hits afforded compound 12, with a triazolopyridine core, as a lead compound. CYP direct inhibition (DI) was identified as an issue of concern, and was resolved through modulation of lipophilicity to culminate in 1-[2-(1-methyl-1H-pyrazol-5-yl)-[1,2,4]triazolo[1,5-a]pyridin-6-yl]-3-(pyridin-4-ylmethyl)urea (21), which showed potent NAMPT activity accompanied with attenuated CYP DI towards multiple CYP isoforms.

Keywords: CYP inhibition; LogD; NAD(+); NAMPT activators; Triazolopyridines.

MeSH terms

  • Animals
  • Cytochrome P-450 Enzyme System / metabolism*
  • Cytokines / metabolism*
  • Dose-Response Relationship, Drug
  • Drug Discovery*
  • Enzyme Inhibitors / chemical synthesis
  • Enzyme Inhibitors / chemistry
  • Enzyme Inhibitors / pharmacology*
  • Humans
  • Mice
  • Mice, Inbred C57BL
  • Molecular Structure
  • Nicotinamide Phosphoribosyltransferase / metabolism*
  • Structure-Activity Relationship
  • Urea / analogs & derivatives
  • Urea / chemistry
  • Urea / pharmacology*

Substances

  • Cytokines
  • Enzyme Inhibitors
  • Urea
  • Cytochrome P-450 Enzyme System
  • Nicotinamide Phosphoribosyltransferase
  • nicotinamide phosphoribosyltransferase, human