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Synthesis and anti-inflammatory effects of new piperazine and ethanolamine derivatives of H1-antihistaminic drugs

[ Vol. 12 , Issue. 12 ]


Abbas Ahmadi, Mohsen Khalili, Ali Nafarie, Arash Yazdani and Babak Nahri-Niknafs   Pages 1282 - 1292 ( 11 )


In addition to their antihistamine effects, H1-receptor antagonists possess pharmacological properties that are not uniformly distributed among this class of drugs, such as anti-inflammatory, anti-allergic and antiplatelet activities. In this paper, Cyclizine (1-benzhydryl-4-methyl-piperazine, I), bromodiphenhydramine (2-[(4-bromophenyl)- phenylmethoxy]-N, N-dimethylethanamine, II) and some of their new piperazine and ethanolamine derivatives (III-VIII) inducing changes in substitution of phenyl and amine moieties were synthesized and their acute and chronic antiinflammatory effects were evaluated by standard pharmacological tests. The results showed that substitution of phenyl by tolyl, anisol and cumene groups in piperazine family could remarkably decrease acute inflammation in these new drugs. Also, substitution of dimethylamine by morpholine group could not decrease this inflammation in new synthesized ethanolamine family. But the results from the cotton pellet-induced granuloma formation in rats showed that none of drugs (I-VIII) were effective to reduce the chronic inflammation.


Acute and chronic anti-inflammation effects, Cyclizine, Bromo diphenhydramine, H1-receptor antagonist, Piperazine and ethanolamine derivatives.


Department of Chemistry, Faculty of Science, Islamic Azad University, P.O.Box: 31485-313, Karaj, Iran

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