Recently, 1-(1,4-dioxaspiro[4,5]dec-2-ylmethyl)-4-(2-methoxyphenyl)piperazine (1) was reported as a highly selective and potent 5-HT1AR ligand. In the present work we adopted an in-parallel synthetic strategy to rapidly explore a new set of arylpiperazine (7-32) that is structurally related to 1. The compounds were tested for binding affinity and functional activity at 5-HT1AR and α<alpha>1-adrenoceptor subtypes and SAR studies were drawn. In particular, compounds 9, 27 and 30 emerged as promising α<alpha>1 receptor antagonists, while compound 10 behaves as the most potent and efficacious 5-HT1AR agonist. All the compounds were docked into the 5HT1AR theoretical model and the results were in agreement with the biological experimental data. These findings may represent a new starting point for developing more selective α<alpha>1 or 5-HT1AR ligands.

Structure-affinity/activity relationships of 1,4-dioxa-spiro[4.5]decane based ligands at α<alpha>1 and 5-HT1A receptors / Franchini, Silvia; Battisti, UMBERTO MARIA; Baraldi, Anna Maria; Prandi, Adolfo; Fossa, Paola; Cichero, Elena; Tait, Annalisa; Sorbi, Claudia; Marucci, Gabriella; Cilia, Antonio; Pirona, Lorenza; Brasili, Livio. - In: EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY. - ISSN 0223-5234. - STAMPA. - 87(2014), pp. 248-266. [10.1016/j.ejmech.2014.09.070]

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