| abstract |
The invention relates to PDE9 inhibitors for treating cardiovascular disorders. Preferred PDE9 inhibitors are compounds of formula I wherein R 1 is H or C 1-6 alkyl, wherein R 1 is attached to either N 1 or N 2 ; R 2 is C 1-6 alkyl optionally substituted by hydroxy or alkoxy; C 3-7 cycloalkyl optionally substituted by alkyl, hydroxy or alkoxy; a saturated 5-6-membered heterocycle optionally substituted by alkyl, hydroxy or alkoxy; het1 or Ar 1 ; R 3 is C 1-6 alkyl optionally substituted by 1 or 2 groups independently selected from: Ar 2 ; C 3-7 cycloalkyl optionally substituted by C 1-6 alkyl; OAr 2 ; SAr 2 ; NHC(O)C 1-6 alkyl; het 2 ; xanthene; and naphthalene. |