Discovery of olodaterol, a novel inhaled β2-adrenoceptor agonist with a 24h bronchodilatory efficacy
作者:Thierry Bouyssou、Christoph Hoenke、Klaus Rudolf、Philipp Lustenberger、Sabine Pestel、Peter Sieger、Ralf Lotz、Claudia Heine、Frank H. Büttner、Andreas Schnapp、Ingo Konetzki
DOI:10.1016/j.bmcl.2009.12.087
日期:2010.2
Compound 4p was identified from a series of 6-hydroxy-4H-benzo[1,4]oxazin-3-ones as potent agonist of the human beta(2)-adrenoceptor with a high beta(1)/beta(2)-selectivity. A complete reversal of acetylcholine-induced bronchoconstriction which lasted over the whole study period of 5 h was demonstrated for 4p in a guinea pig in vivo model without any signs of cardiovascular effects up to 10-fold above the first dose reaching 100% bronchoprotection. The enantiomerically pure (R)-form of 4p exerted a bronchodilatory efficacy over 24 h in dogs and guinea pigs in the absence of systemic pharmacodynamic effects. Formoterol which was tested as comparator in the same in vivo models of acetylcholine-induced bronchoconstriction did not retain efficacy after 24 h. In summary, the preclinical pro. le of compound (R)-4p (olodaterol, also known as BI 1744 CL) suggests a potential for once-daily dosing in man accompanied with an improved safety pro. le. (C) 2010 Elsevier Ltd. All rights reserved.