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

Bioorg Med Chem Lett. 2010 Oct 1;20(19):5623-9. doi: 10.1016/j.bmcl.2010.08.040. Epub 2010 Aug 12.

Abstract

We tested a set of boron containing arylethanolamine derivatives on the human and guinea pig β(2) adrenoceptor (β(2)AR) 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 EC(50) 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 β(2)AR agonist action of boronterol.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adrenergic beta-2 Receptor Agonists / chemical synthesis*
  • Adrenergic beta-2 Receptor Agonists / chemistry
  • Adrenergic beta-2 Receptor Agonists / pharmacology
  • Albuterol / analogs & derivatives*
  • Albuterol / chemical synthesis
  • Albuterol / chemistry
  • Albuterol / pharmacology
  • Animals
  • Binding Sites
  • Computer Simulation
  • Drug Design
  • Guinea Pigs
  • Humans
  • Isoproterenol / pharmacology
  • Muscle Relaxation / drug effects
  • Neuromuscular Agents / chemical synthesis*
  • Neuromuscular Agents / chemistry
  • Neuromuscular Agents / pharmacology
  • Protein Structure, Tertiary
  • Receptors, Adrenergic, beta-2 / chemistry*
  • Receptors, Adrenergic, beta-2 / metabolism
  • Trachea / drug effects

Substances

  • (R)-4-(2-(tert-butylamino)-1-hydroxyethyl)-2-(hydroxymethyl)phenyl hydrogen phenylboronate
  • Adrenergic beta-2 Receptor Agonists
  • Neuromuscular Agents
  • Receptors, Adrenergic, beta-2
  • Isoproterenol
  • Albuterol