Tricyclic pyrazoles. 4. Synthesis and biological evaluation of analogues of the robust and selective CB2 cannabinoid ligand 1-(2',4'-dichlorophenyl)-6-methyl-N-piperidin-1-yl-1,4-dihydroindeno[1,2-c]pyrazole-3-carboxamide

J Med Chem. 2006 Dec 14;49(25):7502-12. doi: 10.1021/jm060920d.

Abstract

New analogues (2a-p) of the previously reported CB(2) ligands 6-methyl- and 6-chloro-1-(2',4'-dichlorophenyl)-N-piperidin-1-yl-1,4-dihydroindeno[1,2-c]pyrazole-3-carboxamides (1a,b) have been synthesized and evaluated for cannabinoid receptor affinity. One example, 1-(2',4'-dichlorophenyl)-6-methyl-N-cyclohexyilamine-1,4-dihydroindeno[1,2-c] pyrazole-3-carboxamide (2a) was shown to have single digit nanomolar affinity for cannabinoid CB(2) receptors. Furthermore, compounds 2a and 2b, as well as lead structures 1a,b, were also shown to be agonist in an in vitro model based on human promyelocytic leukemia HL-60 cells.

MeSH terms

  • HL-60 Cells
  • Humans
  • Indenes / chemical synthesis*
  • Indenes / chemistry
  • Indenes / pharmacology
  • Ligands
  • Mitogen-Activated Protein Kinase 1 / biosynthesis
  • Mitogen-Activated Protein Kinase 3 / biosynthesis
  • Phosphorylation
  • Piperidines / chemical synthesis*
  • Piperidines / chemistry
  • Piperidines / pharmacology
  • Pyrazoles / chemical synthesis*
  • Pyrazoles / chemistry
  • Pyrazoles / pharmacology
  • Radioligand Assay
  • Receptor, Cannabinoid, CB2 / agonists*
  • Structure-Activity Relationship

Substances

  • Indenes
  • Ligands
  • Piperidines
  • Pyrazoles
  • Receptor, Cannabinoid, CB2
  • Mitogen-Activated Protein Kinase 1
  • Mitogen-Activated Protein Kinase 3