[EN] 1,2,4-TRIAZOLO[4,3-a]PYRIDINE DERIVATIVES AND THEIR USE AS POSITIVE ALLOSTERIC MODULATORS OF MGLUR2 RECEPTORS<br/>[FR] DÉRIVÉS DE 1,2,4-TRIAZOLO[4,3-A]PYRIDINE ET LEUR UTILISATION EN TANT QUE MODULATEURS ALLOSTÉRIQUES POSITIFS DES RÉCEPTEURS MGLUR2
申请人:JANSSEN PHARMACEUTICALS INC
公开号:WO2012062750A1
公开(公告)日:2012-05-18
The present invention relates to novel triazolo [4,3-a]pyridine derivatives of Formula (I), wherein all radicals are as defined in the claims. The compounds according to the invention are positive allosteric modulators of the metabotropic glutamate receptor subtype 2 ("mGluR2"), which are useful for the treatment or prevention of neurological and psychiatric disorders associated with glutamate dysfunction and diseases in which the mGluR2 subtype of metabotropic receptors is involved. The invention is also directed to pharmaceutical compositions comprising such compounds, to processes to prepare such compounds and compositions, and to the use of such compounds for the prevention or treatment of neurological and psychiatric disorders and diseases in which mGluR2 is involved.
BF(3).OEt(2) has been illuminated by successfully demonstrating the unique but highly stereoselectivereactions of hydroxy carbonyl and dicarbonyl substrates. For example, treatment of gamma-hydroxy ketone 1c with BF(3).OEt(2)/Bu(3)SnH in CH(2)Cl(2) at -78 to -40 degrees C afforded the corresponding 1, 4-diol 2c with virtually complete diastereoselection, while use of TiCl(4) as a Lewis acid under similar