Disclosed are compounds of the formula:or the pharmaceutically acceptable acid addition salts thereof, wherein:R1, R2, R3, R4 are the same or different and represent
hydrogen, C1-C6
alkyl,
halogen, hydroxy, amino, cyano, nitro,
trifluoromethyl, trifluoromethoxy, C1-C6 alkoxy, -O2CR', -NHCOR', -COR', -SOmR', where R' is C1-C6
alkyl and wherein m is 0, 1 or 2; orR1, R2, R3, R4 independently represent -CONR'R'', or -NR'R'' where R' and R'' independently represent
hydrogen or C1-C6
alkyl;R5 is
hydrogen or C1-C6 alkyl; andR represents an aminoalkyl group,which compounds are useful in the treatment of affective disorders such as
schizophrenia, depression, Alzheimer's
disease,
movement disorders such as
Parkinsonism and
dystonia, and other disorders which respond to
dopaminergic blockade such as
substance abuse and
obsessive compulsive disorders. Further, compounds of this invention may be useful in treating the extrapyramidal side effects associated with the use of conventional neuroleptic agents.