申请人:STERLING DRUG INC.
公开号:EP0089022A2
公开(公告)日:1983-09-21
3-Q-4-R2-5-(Lower-alkanoyl)-6-(lower-alkyt)-2(1H)-pyridinones (I), useful as cardiotonics, where Q is hydrogen or cyano, 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 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-oxonicotonic acid and decarboxylating said substituted nicotinic acid to produce I. Also shown and claimed is methyl 4-acetyl-5-amino-2,4-hexadienoate or acid-addition salt thereof, useful as intermediate or cardiontonic.
3-Q-4-R2-5-(低级烷酰基)-6-(低级烷基)-2(1H)-吡啶酮 (I),可用作强心剂,其中 Q 为氢或氰基,R2 为氢或甲基、分别通过 2-(低级烷酰基)-1-(低级烷基)乙烯胺 (II) 与低级烷基 2-丙炔酸酯或 2-丁炔酸酯反应,或通过水解 4-R2-5-(低级烷酰基)-6-(低级烷基)-1、或相应的 4-R2-5-(低级烷酰基)-6-(低级烷基)-1,2-二氢-2-氧代烟酰胺水解生成相应的 5-(低级烷酰基)-6-(低级烷基)-1,2-二氢-2-氧代烟酸,并将所述取代的烟酸脱羧生成 I。图中还显示并要求得到 4-乙酰基-5-氨基-2,4-己二烯酸甲酯或其酸加成盐,可用作中间体或心酮酸。