申请人:STERLING DRUG INC.
公开号:EP0074091A2
公开(公告)日:1983-03-16
Novel 1-R,-3-Q-5-(3-R'-4-R"-phenyl)-6-R-2(1H)-pyridinones where R, is hydrogen, lower-alkyl or lower-hydroxyalkyl, R is lower-alkyl and, R' and R" are each hydrogen, amino or hydroxy, at least one of R' or R" being other than hydrogen, or R is nitro and R" is hydroxy, are useful as cardiotonics. Also known compounds where R is hydrogen are useful as cardiotonics. Both novel and known compounds can be prepared by a novel process which comprises reacting 1-RI-1,2-dihydro-2-oxo-5-(3-R'-4-R"- phenyl)-6-R-nicotinonitrile, where R1 and R are defined as above, R' is hydrogen, hydroxy, methoxy or amino and R" is hydrogen, hydroxy, amino or methoxy, at least one of R' and R" being other than hydrogen, or R' is nitro and R" is hydroxy with 85% phosphoric acid.
新型 1-R,-3-Q-5-(3-R'-4-R"-苯基)-6-R-2(1H)-吡啶酮,其中 R 是氢、低级烷基或低级羟基烷基,R 是低级烷基,R'和 R "各自是氢、氨基或羟基,R'或 R "中至少有一个不是氢,或 R 是硝基,R "是羟基,可用作强心剂。此外,R 为氢的已知化合物也可用作强心剂。新型和已知化合物均可通过一种新型工艺制备,该工艺包括将 1-RI-1,2-二氢-2-氧代-5-(3-R'-4-R"-苯基)-6-R-烟腈(其中 R1 和 R 定义如上,R'为氢、羟基、甲氧基或氨基,R "为氢、羟基、氨基或甲氧基,R'和 R "中至少有一个不是氢,或 R'为硝基,R "为羟基)与 85%的磷酸反应。