Tricyclic compounds having affinity for the 5-HT1A receptor

A compound represented by the formula I:

• ##STR12## wherein R.sup.1 and R.sup.2 are independently selected from any of H, halogen, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkyl or trifluoromethyl;
• X is O when n is 1 and X is NH when n is 0;
• wherein Y is CH.sub.2 ;
• wherein n is 0 or 1;
• wherein Z is N when X is O and Z is C when X is NH;
• wherein R.sup.3 and R.sup.4 are independently selected from any of H, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.8 acyl, provided that R.sup.3 and R.sup.4 can not both be C.sub.1 -C.sub.8 acyl at the same time or may be taken together to form with the N a monocyclic 5-7 membered saturated ring or a 5 membered ring fused to an aromatic ring;
• or the racemates, individual isomers, hydrates, solvates or acid addition salts thereof.