Synthesis of 3-amino-6-methyl-5-ethoxycarbonyl-4,7-dihydrothieno[2,3-b]pyridine derivatives |
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Authors: | A A Krauze é é Liepin'sh Yu é Pelcher G Ya Dubur |
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Institution: | (1) Institute of Organic Synthesis, Academy of Sciences of the Latvian SSR, 226006 Riga |
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Abstract: | The alkylation of piperidinium salts of substituted 1,4-dihydropyridine-2-thiols with chloroacetonitrile or iodoacetamide gave 2-cyanomethylthio- and 2-carbamoylmethylthio-substituted 6-methyl-4-aryl(pyridyl)-5-ethoxycarbonyl-3-cyano-1,4-dihydropyridines, which undergo intramolecular cyclization in basic media to give 3-amino-6-methyl-4-aryl(pyridyl)-5-ethoxycarbonyl-2-cyano(carbamoyl)-4,7-dihydrothieno2,3-b]pyridines.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 124–128, January, 1987. |
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