Abstract

Summary Oxygen and sulphur atoms were introduced in the cyclohcxyl and piperidinyl moieties of the basic structures 1-(1-phenyl-cyclohexyl)piperidine (PCP), 1-[1-(2-thienyl)cyclohexyl]piperidine (TCP), and 1-[1-(2-benzo[ b ]thiophenyl)cyclohexyl]piperidine (BTCP) to lower their global lipophilicity. The compounds obtained were tested comparatively for their affinity for the PCP receptor labelled with [ 3 H]TCP and for the dopamine (DA) transporter labelled with [ 3 H]BTCP. Lowering the global lipophilicity in PCP and TCP series is detrimental to the affinity and selectivity for the PCP receptor. In the BTCP series lowering of the global lipophilicity is less deleterious and may, on the contrary, be a useful way of increasing selectivity for the DA transporter in some instances.

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