[EN] CYCLOPENTYLBENZAMIDE DERIVATIVES AND THEIR USE FOR THE TREATMENT OF PSYCHOTIC AND COGNITIVE DISORDERS<br/>[FR] DÉRIVÉS DE CYCLOPENTYLBENZAMIDE ET LEUR UTILISATION POUR LE TRAITEMENT DE TROUBLES PSYCHOTIQUES OU COGNITIFS
申请人:TAKEDA CAMBRIDGE LTD
公开号:WO2015055994A1
公开(公告)日:2015-04-23
The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein n, L, X, Ra, Rb, R1, R2 and R3 their preparation, pharmaceutical compositions containing them and their use in therapy.
An efficient synthesis of 2-aminobenzoxazoles is described by a direct oxidative amination of unfunctionalized benzoxazoles with primary amines. The reaction could be performed in the absence of transition metals by using catalytic amounts of a quaternary ammonium iodide and tert-butylhydroperoxide as a cheap and easy-to-handle co-oxidant. In addition to primary amines, aqueous solutions of NH3 were used to introduce a primary amine group into the heterocyclic core.