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Syntheses and Primary Pharmacological Screening of Tandamine and Related Tetrahydrothiopyranoindoles With Potential Antidepressant Properties

Syntheses and Primary Pharmacological Screening of Tandamine and Related Tetrahydrothiopyranoindoles With Potential Antidepressant Properties

I Jirkovsky, L G Humber, K Voith, M P Charest

Arzneimittelforschung. 1977;27(9):1642-8.

PMID: 579130

Abstract:

A series of novel 1,3,4,9-tetrahydro-1-methyl-thiopyrano-[3,4-b]indole-1-ethanamines has been synthesized and examined for effects on reserpine-induced ptosis and reserpine-induced hypothermia in mice. One member of the series, the 9-ethyl-N,N-dimethyl derivative V (tandamine), was selected for further studies in regard to its possible use as an antidepressant agent. Tandamine has been resolved, and the levorotatory enantiomer was found to be more active than the racemic compound. The N-desmethyl derivative XIII, a metabolite of tandamine, has been prepared. The 5-ethyl-1,3,4,5-tetrahydro-N,N,1-trimethylthiopyrano[4,3-b]indole-1-ethanamine XXI, an analog of tandamine with the isomeric ring system, has also been synthesized and evaluated. In the primary pharmacological screening and in the drug-interaction studies with reserpine, tetrabenazine, and tremorine, tandamine was compared to the clinically effective tricyclic antidepressants--desipramine, imipramine, and amitriptyline. Tandamine was more effective than these agents in several screening procedures indicative of potential antidepressant activity.

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