Abstract
Heating of substituted benzimidazole-2-sulfonic acids in the presence of excess quantities of secondary amines was used to synthesize dialkylaminobenzimidazoles. Experimental studies of potential antiarrhythmic, antiaggregation, hemorheological, AT1 angiotensin- and NHE-1-inhibiting, and antiserotonin activity identified active compounds. 1[-2-(5-Methyl)benzimidazole]pyrrolidine had greater NHE-inhibiting activity than zoniporide. 1-{[2-(5-Methoxy)benzimidazole]-4-N-methyl}piperazine dihydrochloride had greater antiaggregatory activity than acetylsalicylic acid, while 1-[2-(5-methyl)benzimidazole]piperidine was as active as cyproheptadine in terms of 5-HT2A antagonistic activity. 1-(2-Benzimidazole)pyrrolidine and 1-[2-(5-chloro) benzimadazole pyrrolidine dihydrochlorides had 5-HT3 antagonist activity equal to that of tropisetron..
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