| abstract |
Disclosed are compounds of the formula: or the pharmaceutically acceptable addition salts thereof wherein: R<SUB>1 </SUB>is halogen or C<SUB>1</SUB>-C<SUB>4 </SUB>alkyl; and R<SUB>2 </SUB>and R<SUB>3 </SUB>are the same or different and represent hydrogen, halogen, C<SUB>1</SUB>-C<SUB>4 </SUB>alkyl, C<SUB>1</SUB>-C<SUB>4 </SUB>alkoxy, alkylthio, hydroxy, amino, mono(C<SUB>1</SUB>-C<SUB>4</SUB>)alkylamino, di(C<SUB>1</SUB>-C<SUB>4</SUB>)alkylamino, or R<SUB>2 </SUB>and R<SUB>3 </SUB>together represent a 4 carbon alkenylene moiety that together with the phenyl ring to which they are attached form a naphthyl moiety, which compounds are useful in the treatment of neuropsycological diseases such as schizophrenia, psychotic depression and mania. |