Rapid preparation of triazolyl substituted NH-heterocyclic kinase inhibitors via one-pot Sonogashira coupling-TMS-deprotection-CuAAC sequence

Org Biomol Chem. 2011 Jul 21;9(14):5129-36. doi: 10.1039/c1ob05586k. Epub 2011 May 31.

Abstract

The one-pot, three-component Sonogashira coupling-TMS-deprotection-CuAAC ("click") sequence is the key reaction for the rapid synthesis of triazolyl substituted N-Boc protected NH-heterocycles, such as indole, indazole, 4-, 5-, 6-, and 7-azaindoles, 4,7-diazaindole, 7-deazapurines, pyrrole, pyrazole, and imidazole. Subsequently, the protective group was readily removed to give the corresponding triazolyl derivatives of these tremendously important NH-heterocycles. All compounds have been tested in a broad panel of kinase assays. Several compounds, 8f, 8h, 8k, and 8l, have been shown to inhibit the kinase PDK1, a target with high oncology relevance, and thus they are promising lead structures for the development of more active derivatives. The X-ray structure analysis of compound 8f in complex with PDK1 has revealed the detailed binding mode of the molecule in the kinase.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • 3-Phosphoinositide-Dependent Protein Kinases
  • Alkynes / chemistry*
  • Azides / chemistry*
  • Catalysis
  • Copper / chemistry*
  • Crystallography, X-Ray
  • Cyclization
  • Heterocyclic Compounds / chemical synthesis*
  • Heterocyclic Compounds / chemistry
  • Heterocyclic Compounds / pharmacology
  • Models, Molecular
  • Molecular Structure
  • Protein Kinase Inhibitors / chemical synthesis*
  • Protein Kinase Inhibitors / chemistry
  • Protein Kinase Inhibitors / pharmacology
  • Protein Serine-Threonine Kinases / antagonists & inhibitors
  • Stereoisomerism
  • Structure-Activity Relationship
  • Triazoles / chemistry
  • Triazoles / pharmacology
  • Trimethylsilyl Compounds / chemistry*

Substances

  • Alkynes
  • Azides
  • Heterocyclic Compounds
  • Protein Kinase Inhibitors
  • Triazoles
  • Trimethylsilyl Compounds
  • Copper
  • 3-Phosphoinositide-Dependent Protein Kinases
  • Protein Serine-Threonine Kinases