| abstract |
Compounds of formula (I) and salts and solvates are provided wherein R2 is selected from phenyl substituted with n R1 groups, and pyridyl substituted with n R1 groups; n = 0, 1 or 2; each R1 is independently selected from the group consisting of halo, C1-4alkyl, C1-4alkoxy, haloC1-4alkyl, haloC1-4alkoxy and cyano; R3 is selected from hydrogen and C1-2 alkyl; R4 is selected from the group consisting of ethyl, n- propyl, i-propyl, n-butyl, i-butyl and t-butyl; or R3 and R4 together with the nitrogen atom to which they are attached form a saturated 5- or 6-membered heterocyclic ring optionally substituted with one or more groups X; each X is independently selected from the group consisting of C1-4alkyl, and haloC1-4alkyl; R12 is selected from the group consisting of hydrogen, fluoro, chloro, bromo, methyl and methylthio; R13 is selected from hydrogen, chloro and trifluoromethyl; R14 is selected from hydrogen, trifluoromethyl and chloro; R15 is selected from hydrogen, chloro and trifluoromethyl; R16 is selected from hydrogen, methyl, fluoro and chloro; R12, R13, R14, R15 and R16 not all simultaneously being hydrogen. Processes for the preparation and uses of the compounds as medicaments for treating disorders such as psychoses, dementia or attention deficit disorder are also disclosed. |