Parallel synthesis of a series of potentially brain penetrant aminoalkyl benzoimidazoles

Bioorg Med Chem. 2008 Mar 1;16(5):2313-28. doi: 10.1016/j.bmc.2007.11.068. Epub 2007 Nov 29.

Abstract

Alpha7 agonists were identified via GOLD (CCDC) docking in the putative agonist binding site of an alpha7 homology model and a series of aminoalkyl benzoimidazoles was synthesised to obtain potentially brain penetrant drugs. The array was prepared starting from the reaction of ortho-fluoronitrobenzenes with a selection of diamines, followed by reduction of the nitro group to obtain a series of monoalkylated phenylene diamines. N,N'-Carbonyldiimidazole (CDI) mediated acylation, followed by a parallel automated work-up procedure, afforded the monoacylated phenylenediamines which were cyclised under acidic conditions. Parallel work-up and purification afforded the array products in good yields and purities with a robust parallel methodology which will be useful for other libraries. Screening for alpha7 activity revealed compounds with agonist activity for the receptor.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkylation
  • Amination
  • Animals
  • Benzimidazoles / chemical synthesis*
  • Benzimidazoles / chemistry
  • Benzimidazoles / pharmacology*
  • Brain / drug effects*
  • Brain / metabolism
  • Calcium / metabolism
  • Cell Line
  • Chemical Phenomena
  • Chemistry, Physical
  • Chickens
  • Models, Molecular
  • Molecular Structure
  • Rats
  • Receptors, Nicotinic / genetics
  • Receptors, Nicotinic / metabolism
  • Structure-Activity Relationship
  • alpha7 Nicotinic Acetylcholine Receptor

Substances

  • Benzimidazoles
  • Chrna7 protein, rat
  • Receptors, Nicotinic
  • alpha7 Nicotinic Acetylcholine Receptor
  • Calcium