[EN] PYRAZOLO[4,3-D]PYRIMIDIN-7(6H)-ONE DERIVATIVES AS PDE9 INHIBITORS<br/>[FR] DÉRIVÉS PYRAZOLO[4,3-D]PYRIMIDIN-7(6H)-ONE COMME INHIBITEURS DE PDE9
申请人:CELON PHARMA SA
公开号:WO2014024125A1
公开(公告)日:2014-02-13
Pyrazolo[4,3-d]pyrimidin-7(6H)-one derivatives represented by the general formula (I), wherein R1 represents hydrogen atom or methyl; when R1 represents hydrogen atom, then R2 represents cyclopentyl, tetrahydropyranyl, cyclohexyl, or cyclohexyl substituted with 1 or 2 halogen atoms; when R1 represents methyl, then R2 represents cyclopentyl; R3 is selected from the group consisting of phenyl unsubstituted or substituted with 1 to 3 substituents selected from F, CI, Br, I, and OCH3; and 6- to 10-membered heteroaryl with 1 to 3 heteroatoms selected independently form O, N and S; and Q represents C1 -C3-alkylene group, which is unsubstituted or substituted with 1 to 3 C1 -C3-alkyl groups; and their salts. The compounds are PDE9A inhibitors useful as medicaments, in particular for treatment of cognitive function disorders and neurodegenerative diseases.