Piperazine derivatives

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...

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514210, 514212, 5142358, 514255, 544121, 544230, 544238, 544295, 544357, 544359, 544360, 544368, 544372, 544373, 544377, 544393, 540598, A61K 31495, C07D24104, C07D2958

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active

053825837

ABSTRACT:
Piperazine derivatives of formula: ##STR1## and their pharmaceutically acceptable acid addition salts are disclosed. In the formula, n is 1 or 2; R and R.sup.5 are hydrogen or lower alkyl, R.sup.1 is substituted or unsubstituted aryl or a heteroaromatic radical; R.sup.3 is substituted or unsubstituted aryl or substituted or unsubstituted arylalkyl; R.sup.9 is hydrogen, alkyl, cycloalkyl, cycloalkylalkyl or substituted or unsubstituted arylalkyl with the proviso that when R.sup.9 is hydrogen, alkyl, or arylalkyl, R.sup.5 is other than a tertiary alkyl group. The compounds of this invention are useful 5-HT.sub.1A antagonists for the treatment of CNS disorders such as anxiety.

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