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Synthesis, Cardiovascular Activity, and Electrochemical Oxidation of Nitriles of 5-Ethoxycarbonyl-2-methylthio-1,4-dihydropyridine-3-carboxylic Acid

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

Nitriles of 4-aryl-5-ethoxycarbonyl-2-methylthio-1,4-dihydropyridine-3-carboxylic acid have been obtained by the methylation of 1,4-dihydropyridine-2-thiolates; of 1,4-dihydropyridine-2(3H)-thiones in the presence of a stoichiometric amount of piperidine, and of a mixture of 1,4,5,6-tetrahydro- and 1,4-dihydropyridine-2-thiolates with methyl iodide. One-pot multicomponent synthesis has also been used in the condensation of ethyl 2-arylmethyleneacetoacetate, 2-cyanothioacetamide, piperidine, and methyl iodide; of ethyl acetoacetate, 3-aryl-2-cyanothioacrylamide, piperidine, and methyl iodide; and of ethyl acetoacetate, an aromatic aldehyde, 2-cyanothioacetamide, piperidine, and methyl iodide. The latter, a five-component method, takes place rapidly and under mild conditions, it is efficient (yields of 75-96%, economy of time, labour, and resources) and “green” (there is no need to synthesize lachrymators, such as 3-aryl-2-cyanothioacrylamides).The cardiovascular activity and the electrochemical oxidation of the synthesized 2-methylthio-1,4-dihydropyridines have been investigated. A comparative analysis has been carried out of the ability towards electrochemical oxidation as a function of the electronic properties of the substituent at position 4 of the heterocycle.

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Authors
  1. A. Krauze
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  2. L. Baumane
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  3. L. Sile
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  4. L. Chernova
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  5. M. Vilums
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  6. R. Vitolina
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  7. G. Duburs
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  8. J. Stradins
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Krauze, A., Baumane, L., Sile, L. et al. Synthesis, Cardiovascular Activity, and Electrochemical Oxidation of Nitriles of 5-Ethoxycarbonyl-2-methylthio-1,4-dihydropyridine-3-carboxylic Acid. Chemistry of Heterocyclic Compounds 40, 876–887 (2004). https://doi.org/10.1023/B:COHC.0000044570.13567.74

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