[EN] IMIDAZO [1,5-A] PYRIMIDO [5,4-D] BENZAZEPINE DERIVATIVES AS GABA A RECEPTOR MODULATORS<br/>[FR] DERIVES D'IMIDAZO [1,5-A] PYRIMIDO [5,4-D] BENZAZEPINE EN TANT QUE MODULATEURS DU RECEPTEUR GABA A
申请人:HOFFMANN LA ROCHE
公开号:WO2002094834A1
公开(公告)日:2002-11-28
The present invention relates to compounds of formula (I) wherein R1 is halogen or lower alkyl; R2 is hydrogen, lower alkyl, cycloalkyl, -(CH¿2?)m-phenyl, wherein the phenyl ring may be substituted by lower alkoxy, or is (CH2)m-indolyl; R?3¿ is C(O)O-lower alkyl, -C(O)OH, or a five membered heteroaromatic group, which rings may be substituted by lower alkyl or cycloalkyl; n is 0, 1 or 2 ; m is 0, 1 or 2 ; and their pharmaceutically acceptable acid addition salts. It has been found that this class of compounds show high affinity and selectivity for GABA A α5 receptor binding sites and might be useful for the treatment of cognitive enhancer or of cognitive disorders like Alzheimer's disease.