Pyridoxine-derived bicyclic amido-, ureido-, and carbamato-pyridinols: synthesis and antiangiogenic activities

Org Biomol Chem. 2014 Nov 21;12(43):8702-10. doi: 10.1039/c4ob01221f.

Abstract

We recently developed an efficient and practical synthesis for a novel series of pyridoxine-derived 6-amido-2,4,5-trimethylpyridin-3-ols and found that this novel scaffold has outstanding activity to inhibit angiogenesis measured by the quantitative chick embryo chorioallantoic membrane (CAM) assay. As an effort to extend the scope of the amidopyridinol scaffold, we here report the synthesis and antiangiogenic activities of a series of bicyclic versions of the amidopyridinol including five- and six-membered cyclic amide-, cyclic urea-, and cyclic carbamate-fused pyridinols. The six membered bicyclic derivatives were prepared by the reported procedures, and the five-membered ring-fused ones were synthesized by new synthetic methods developed in this study. CAM assays showed that both six- and five-membered lactam-fused pyridinols have activities comparable to sunitinib malate, the positive control, in inhibition of vascular endothelial growth factor-induced angiogenesis. On the other hand, the urea and the carbamate derivatives showed modest to moderate antiangiogenic activities. In summary, some bicyclic aminopyridinols can provide a good platform for structural exploitation in future medicinal chemistry work.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Angiogenesis Inhibitors / chemical synthesis*
  • Angiogenesis Inhibitors / chemistry
  • Angiogenesis Inhibitors / pharmacology
  • Animals
  • Bridged Bicyclo Compounds / chemical synthesis*
  • Bridged Bicyclo Compounds / chemistry
  • Bridged Bicyclo Compounds / pharmacology
  • Chick Embryo
  • Chorioallantoic Membrane / blood supply
  • Chorioallantoic Membrane / drug effects*
  • Dose-Response Relationship, Drug
  • Indoles / pharmacology
  • Lactams / chemistry
  • Neovascularization, Physiologic / drug effects*
  • Pyridines / chemical synthesis*
  • Pyridines / chemistry
  • Pyridines / pharmacology
  • Pyrroles / pharmacology
  • Structure-Activity Relationship
  • Sunitinib
  • Vascular Endothelial Growth Factor A / antagonists & inhibitors
  • Vascular Endothelial Growth Factor A / pharmacology

Substances

  • Angiogenesis Inhibitors
  • Bridged Bicyclo Compounds
  • Indoles
  • Lactams
  • Pyridines
  • Pyrroles
  • Vascular Endothelial Growth Factor A
  • Sunitinib