期刊
ARCHIV DER PHARMAZIE
卷 344, 期 5, 页码 287-291出版社
WILEY-BLACKWELL
DOI: 10.1002/ardp.200900168
关键词
Arylpiperazines; Atypical antipsychotics; D-2 receptors; 5-HT2A receptors; Pharmacological screening
资金
- Ministry for Science, Technology and Environmental Protection of Serbia, [143032, 142009]
Five groups of previously synthesized and initially screened non-substituted and 4-halogenated arylpiperazin-1-yl-ethyl-benzimidazoles were estimated for their in-vitro binding affinities at the rat D-2, 5-HT2A, and alpha(1)-adrenergic receptors. Among all these compounds, 2-methoxyphenyl and 2-chlorophenyl piperazines demonstrate the highest affinities for the tested receptors. The effects of 4-halogenation of benzimidazoles reveal that substitution with brominemay greatly increase the affinity of the compounds for the studied receptors, while the effect of substitution with chlorine is less remarkable. Most of the tested components show 5-HT2A/D-2 pK(i) binding ratios slightly above or less than 1, while only 4-chloro-6-(2-{4-[3-(trifluoromethyl) phenyl]piperazin-1-yl}ethyl)-1H-benzimidazole expresses an appropriate higher binding ratio (1.14), which was indicated for atypical neuroleptics. This compound exhibits a non-cataleptic action in rats and prevents d-amphetamine-induced hyperlocomotion in mice, which suggest its atypical antipsychotic potency.
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