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Details for Patent: 4,313,951

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Summary for Patent: 4,313,951

Title: 3-Substituted-6-(lower-alkyl)-5-(pyridinyl)-2(1H)-pyridinones, their cardiotonic use and intermediates therefor
Abstract:1-R.sub.1 -3-[amino, cyano, carbamyl, halo, lower-alkylamino, di-(lower-alkyl)amino or lower-acylamino]-6-(lower-alkyl)-5-(pyridinyl)-2(1H)-pyridinones or pharmaceutically-acceptable acid-addition or cationic salts thereof are useful as cardiotonic agents, where R.sub.1 is hydrogen, lower-alkyl or lower-hydroxyalkyl. 1-R.sub.1 -3-amino-6-(lower-alkyl)-5-(pyridinyl)-2(1H)-pyridinones are prepared by hydrolyzing the corresponding 3-cyano compounds to produce the corresponding 3-carbamyl compounds and reacting the latter with a reagent capable of converting carbamyl to amino. The 1-R.sub.1 -3-cyano-6-(lower-alkyl)-5-(pyridinyl)-2(1H)-pyridinones are prepared by reacting (pyridinylmethyl) lower-alkyl ketones with dimethylformamide di-(lower-alkyl) acetal to produce 1-(pyridinyl)-2-(dimethylamino)ethenyl lower-alkyl ketone and reacting said ketones with N-R.sub.1 -.alpha.-cyanoacetamide to produce the 1-R.sub.1 -3-cyano-6-(lower-alkyl)-5-(pyridinyl)-2(1H)-pyridinones. Also shown are the conversions: of the 3-cyano compounds to the 3-H compounds; of the 3-H compounds to the 3-halo compounds; of the 3-halo compounds to the 3-[mono-(lower-alkyl)- or di-(lower-alkyl)-amino]compounds; and, of the 3-amino compounds to the 3-lower-acylamino or 3-[mono-(lower-alkyl)- or di-(lower-alkyl)amino] compounds.
Inventor(s): Lesher; George Y. (Schodack, NY), Philion; Richard E. (Schodack, NY)
Assignee: Sterling Drug Inc. (New York, NY)
Application Number:06/198,461
Patent Claim Types:
see list of patent claims
Compound; Composition; Use; Dosage form;

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International Patent Family for Patent: 4,313,951

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina230029► subscribe
Austria379386► subscribe
Austria379387► subscribe
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