Synthesis and evaluation of a series of 2-substituted-5-thiopropylpiperazine (piperidine)-1,3,4-oxadiazoles derivatives as atypical antipsychotics.
Abstract
It is important to develop novel antipsychotics that can effectively treat schizophrenia with minor side-effects. The aim of our work is to develop novel antipsychotics that act on dopamine D(2) and D(3), serotonin 5-HT(1A) and 5-HT(2A) receptors with low affinity for the serotonin 5-HT(2C) and H(1) receptors, which can effectively cure positive symptoms, negative symptoms and cognitive impairment without the weight gain side-effect. A series of 2-substituted-5-thiopropylpiperazine (piperidine) -1,3,4-oxadiazoles derivatives have been synthesized and the target compounds were evaluated for binding affinities to D(2), 5-HT(1A) and 5-HT(2A) receptors. Preliminary results indicated that compounds 14, 16 and 22 exhibited high affinities to D(2), 5-HT(1A) and 5-HT(2A) receptors among these compounds. Further binding tests showed that compound 22 had high affinity for D(3) receptor, and low affinity for serotonin 5-HT(2C) and H(1) receptors. In addition, compound 22 inhibited apomorphine-induced climbing behavior and MK-801-induced hyperactivity with no extrapyramidal symptoms liability in mice. Moreover, compound 22 exhibited acceptable pharmacokinetic properties. Compound 22 showed an atypical antipsychotic activity without liabili...Continue Reading
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