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This work is a continuation of our previous research, concentrating this time on lead structure modification to increase the 5-HT 1A receptor affinity and water solubility of designed compounds. Therefore, the compounds synthesised within the present project included structural analogues of 3β-acylamine derivatives of tropane with the introduction of a methyl substituent in the benzyl ring and a 2-quinoline, 3-quinoline, or 6-quinoline moiety. A series of novel 3β - aminotropane derivatives was evaluated for their affinity for 5-HT 1A , 5-HT 2A , and D 2 receptors, which allowed for the identification of compounds 12e , 12i , and 19a as ligands with highest affinity for the tested receptors; they were then subjected to further evaluation in preliminary in vivo studies. Selected compounds 12i and 19a displayed antipsychotic properties in the d-amphetamine-induced and MK-801-induced hyperlocomotor activity test in mice. Moreover, compound 19a showed significant antidepressant-like activity in the forced swim test in mice.

Synthesis and biological investigations of 3β-aminotropane arylamide derivatives with atypical antipsychotic profile