52600-53-0Relevant academic research and scientific papers
5-substituted-3-oxadiazolyl-1,6-naphthyridin-2(1H)-one derivatives
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, (2008/06/13)
A 5-substituted-3-oxadiazolyl-1,6-naphthyridin-2(1H)-one derivative of the formula (I): STR1wherein Het is oxadiazolyl, R 1 is H, lower alkyl, cyclo-lower alkyl, trifluoromethyl, lower alkenyl, lower alkynyl, lower alkoxy, lower alkoxy-lower alkyl, hydrox
Synthesis of 1-(β-D-glycopyranosyl)-3-deazapyrimidines from 2-hydroxy and 2-mercaptopyridines
Attia, Adel M.,Elgemeie, Galal H.,Alnaimi, Ibrahim S.
, p. 1355 - 1363 (2007/10/03)
The synthesis of new 4- and 5-substituted-3-cyanopyridine nucleosides has been performed by reacting the silylated pyridines and penta-O-aeetyl-α -Dglycopyranose in dichloroethane in the presence of SnCl4. The free nucleosides were tested for their potential activity against HIV and different types of tumor.
Synthesis of 2,3,5,6-tetrasubstituted pyridines from enamines derived from N,N-dimethylformamide dimethyl acetal
Abu-Shanab,Redhouse,Thompson,Wakefield
, p. 557 - 560 (2007/10/02)
Reactions of 1,3-dicarbonyl compounds with N,N-dimethylformamide dimethyl acetal, followed by cyanothioacetamide or cyanoacetamide and sodium hydride, then acidification, give 5,6-disubstituted 3-cyanopyridine-2(1H)-thiones or 5,6-disubstituted 3-cyanopyridin-2(1H)-ones 4. Analogous reactions with the malononitrile dimer give 5,6-disubstituted 3-cyano-2-(dicyanomethylene)-1,2-dihydropyridines 9.
Novel alkoxyimino ether derivatives of 5-acyl-2(1H)-pyridinones
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, (2008/06/13)
This invention relates to alkoxyimino ether derivatives of 5-acyl-2(1H)-pyridinones and to their use as cardiotonic agents useful in treating cardiac failure, and to the process useful in the preparation thereof.
Pyridone esters as inotropic agents
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, (2008/06/13)
Described are compounds of the formula STR1 wherein R is hydrogen, lower alkyl, halo, cyano, hydroxy, amino, lower alkylamino, --CH2 NH2, --CH2 OH or --COOR"; R' is hydrogen, lower cycloalkyl or lower alkyl; R' is lower alkenyl, lower alkynyl, lower cycloalkyl, --(W)n Y wherein W is straight or branched chain lower alkyl or lower alkenyl, n is 0 to 5, and Y is Ar, lower cycloalkyl, lower alkenyl, lower alkynyl, --COOZ wherein Z is lower alkyl, STR2 or NAB wherein A and B are, independently, lower alkyl, benzyl or substituted benzyl, and Ar is 2, 3 or 4-pyridyl, pyridazinyl, pyrimidinyl, quinolyl, isoquinolyl, phthalazinyl, quinazolinyl, thiazolyl, phenyl, benzyl, furyl, tetrahydrofuryl or thienyl, unsubstituted or substituted with lower alkyl, lower alkoxy, halo, amino, or --CF3 ; R"' is --COOR", STR3 and X is oxygen or nitrogen; or a pharmaceutically acceptable salt thereof, and their use in the treatment of impaired ventricular myocardial contractility. The compounds exhibit cardiotonic activity.
5-Acyl-2-(1H)-pyridinones
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, (2008/06/13)
Novel 5-acyl-2-(1H)pyridinones and their use as cardiotonic agents. Typical of the compounds is 5-acetyl-1,2-dihydro-6-methyl-2-oxo-3-pyridinecarbonitrile which is prepared by condensing anionic cyano acetamide with 3-[(dimethylamino)methylenyl]-2,4-penta
Reaction of 2-Dimethylaminomethylene-1,3-diones with Dinucleophiles.V. Synthesis of 5-Acyl-1,2-dihydro-2-oxo-3-pyridinecarbonitriles and 1,2,5,6,7,8-Hexahydro-2,5-dioxo-3-quinolinecarboxamides
Mosti, Luisa,Schenone, Pietro,Menozzi, Giulia
, p. 1503 - 1509 (2007/10/02)
The reaction of open-chain sym-2-dimethylaminomethylene-1,3-diones Ia-d with sodium cyanoacetamide gave, generally in good yields, 6-substituted 5-acyl-1,2-dihydro-2-oxo-3-pyridinecarbonitriles IIa-d, whereas cyclohexane sym-2-dimethylaminomethylene-1,3-diones Ie-h afforded in general a mixture of 1,2,5,6,7,8-hexahydro-2,5-dioxo-3-quinolinecarbonitriles and 5,6,7,8-tetrahydro-2,5-dioxo-2H-1-benzopyran-3-carboxamides, the latter being isolated in two cases.The reaction of Ie-h with cyanoacetamide in refluxing anhydrous ethanol gave 1,2,5,6,7,8-hexahydro-2,5-dioxo-3-quinolinecarboxamides IIIe-h in excellent yields, whereas Ia-d did not react with the exception of Ia which afforded in good yield 3-pyridinecarboxamide IIIa.Other 3-pyridinecarboxamides were obtained by partial hydrolysis of nitriles IIb,d. 3-Pyridine and 3-quinoline carboxamides were hydrolyzed in satisfactory yields with hydrochloric acid to the corresponding carboxylic acids, which were decarboxylated in good yields to 5-acyl-2(1H)-pyridinones and 7,8-dihydro-2,5-(1H,6H)-quinolinediones, respectively, by reflux in quinoline containing a catalytic amount of copper powder.
5-Alkanoyl-6-alkyl-2(1H)-pyridinones, their preparation and their cardiotonic use
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, (2008/06/13)
4-R2 -5-(Lower-alkanoyl)-6-(lower-alkyl)-2(1H)-pyridinones (I), useful as cardiotonics, where R2 is hydrogen or methyl, are prepared by reacting 2-(lower-alkanoyl)-1-(lower-alkyl)ethenamine (II) with lower-alkyl 2-propynoate or 2-butynoate respectively or by hydrolyzing 4-R2 -5-(lower-alkanoyl)-6-(lower-alkyl)-1,2-dihydro-2-oxonicotinonitrile (III), Q is CN) or corresponding 4-R2 -5-(lower-alkanoyl)-6-(lower-alkyl)-1,2-dihydro-2-oxonicotinamide to produce the corresponding 5-(lower-alkanoyl)-6-(lower-alkyl)-1,2-dihydro-2-oxonicotinic acid and decarboxylating said substituted nictotinic acid to produce I. Also disclosed and claimed are cardiotonic uses of 3-Q-4-R2 -5-(lower-alkanoyl)-6-(lower-alkyl)-2(1H)-pyridinones where Q is hydrogen or cyano and R2 is hydrogen or methyl (III). Also shown and claimed is methyl 4-acetyl-5-amino-2,4-hexadienoate or acid-addition salt thereof, useful as intermediate or cardiotonic.
5-Alkyl-1,6-naphthyridin-2(1H)-ones and cardiotonic use thereof
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, (2008/06/13)
1-R"-3-Q-4-R'-5-R-1,6-naphthyridin-2(1H)-ones (I) or salts thereof, where R is lower-alkyl, R' is hydrogen or methyl, R" is hydrogen or lower-alkyl, and Q is hydrogen, hydroxy, amino, cyano, carbamyl, carboxy or aminocarbamyl, are useful as cardiotonic ag
