Design, synthesis and in vitro evaluation of (R)-4-(2-(tert-butylamino)-1- hydroxyethyl)-2-(hydroxymethyl)phenyl hydrogen phenylboronate: A novel salbutamol derivative with high intrinsic efficacy on the β2 adrenoceptor

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Abstract

We tested a set of boron containing arylethanolamine derivatives on the human and guinea pig β2 adrenoceptor (β2AR) 3-D structures by docking methodology. The compound with the highest affinity based on docking analysis, (R)-4-(2-(tert-butylamino)-1-hydroxyethyl)-2- (hydroxymethyl)phenyl hydrogen phenylboronate (boronterol) was synthesized, characterized and tested in guinea pig tracheal rings at basal tone and with histamine-induced contractions. Boronterol was at least eightfold more potent than salbutamol as a smooth muscle relaxant drug (judged by the EC50 values) and showed a similar maximal relaxant effect as isoproterenol. ICI118,551 showed competitive antagonism on the relaxing effect of boronterol. These results suggest the β2AR agonist action of boronterol.

Original languageEnglish
Pages (from-to)5623-5629
Number of pages7
JournalBioorganic and Medicinal Chemistry Letters
Volume20
Issue number19
DOIs
StatePublished - 1 Oct 2010

Keywords

  • Boron
  • Boronterol
  • Docking
  • Guinea pig
  • Salbutamol derivative
  • β adrenoceptor agonist

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