申请人:Sterling Drug Inc.
公开号:US04305948A1
公开(公告)日:1981-12-15
N-Hydroxy-1-R.sub.1 -1,2-dihydro-2-oxo-5-PY-6-R-nicotinimidamides or pharmaceutically-acceptable acid-addition salts thereof, useful as cardiotonic agents, are prepared by reacting 1-R.sub.1 -1,2-dihydro-2-oxo-5-PY-6-R-nicotinonitriles with hydroxylamine and are converted by reaction with polyphosphoric acid to the corresponding cardiotonically useful 1-R.sub.1 -3-amino-5-PY-6-R-2(1H)-pyridinones, where R.sub.1 is hydrogen, lower-alkyl and lower-hydroxyalkyl, R is hydrogen or lower-alkyl, and PY is 4- or 3-pyridinyl or 4- or 3-pyridinyl having one or two lower-alkyl substituents.
N-羟基-1-R.sub.1-1,2-二氢-2-氧-5-PY-6-R-烟酰胺或其药物可接受的酸加合物,可用作心脏强心剂,通过将1-R.sub.1-1,2-二氢-2-氧-5-PY-6-R-烟酰腈与羟胺反应制备,然后通过与多聚磷酸反应转化为相应的有用的1-R.sub.1-3-氨基-5-PY-6-R-2(1H)-吡啶酮,其中R.sub.1是氢,低烷基和低羟基烷基,R是氢或低烷基,PY是4-或3-吡啶基或4-或3-吡啶基,具有一个或两个低烷基取代基。