申请人:Sterling Drug Inc.
公开号:US04294837A1
公开(公告)日:1981-10-13
1,3-Dihydro-1-R.sub.1 -3-R.sub.3 -6-PY-5-Q-2H-imidazo[4,5-b]pyridin-2-ones or -2-thiones or pharmaceutically-acceptable acid-addition salts thereof, which are useful as cardiotonic agents, where Q is hydrogen or lower-alkyl, R.sub.1 and R.sub.3 are each hydrogen, lower-alkyl, lower-hydroxyalkyl, 2,3-dihydroxypropyl, lower-alkoxyalkyl or Y-NB where Y is lower-alkylene and NB is di-(lower-alkyl)amino or 4-morpholinyl, at least one of R.sub.1 and R.sub.3 being hydrogen, and PY is 4- or 3-pyridinyl or 4- or 3-pyridinyl having one or two substituents, are prepared by reacting a 2-R.sub.3 NH-3-R.sub.1 NH-5-PY-6-Q-pyridine with urea or carbonyldiimidazole to produce said -2-one or with an alkali metal xanthate, thiourea or thiocarbonyldiimidazole to produce said -2-thione. Also shown and claimed are cardiotonic compositions and a method for increasing cardiac contractility using said cardiotonic agents. Also shown are processes for preparing said intermediate 2-R.sub.3 NH-3-R.sub.1 NH-5-PY-6-Q-pyridines and other intermediates used in said processes.
1,3-二氢-1-R.sub.1-3-R.sub.3-6-PY-5-Q-2H-咪唑并[4,5-b]吡啶-2-酮或-2-硫酮或其药用可接受的酸加合物盐,可用作心力衰竭药物,其中Q为氢或较低烷基,R.sub.1和R.sub.3分别为氢、较低烷基、较低羟基烷基、2,3-二羟基丙基、较低烷氧基烷基或Y-NB,其中Y为较低烷基烯和NB为二-(较低烷基)氨基或4-吗啉基,R.sub.1和R.sub.3中至少有一个为氢,PY为4-或3-吡啶基或带有一个或两个取代基的4-或3-吡啶基,通过将2-R.sub.3 NH-3-R.sub.1 NH-5-PY-6-Q-吡啶与尿素或羰基二咪唑反应制备所述的-2-酮,或与碱金属黄原酸酯、硫脲或硫代羰基二咪唑反应制备所述的-2-硫酮。还显示并声称心力衰竭组合物和使用所述心力衰竭药物增加心脏收缩力的方法。还显示了制备所述中间体2-R.sub.3 NH-3-R.sub.1 NH-5-PY-6-Q-吡啶和所述过程中使用的其他中间体的方法。