Phenylcarbamate derivatives were synthesized and evaluated in radioligand binding assays for different nicotinicacetylcholinereceptor (nAChR) subtypes. Carbamate derivatives bearing a pyrrolidine or piperidine moiety 8-20 exhibited much lower affinity for alpha7* nAChR than the analogues in the quinuclidine series 21-25, although the same structural elements are present. Furthermore, in contrast