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    • 4. 发明授权
    • Naphthyridine derivatives
    • 萘啶衍生物
    • US4341784A
    • 1982-07-27
    • US187081
    • 1980-09-15
    • Jun-ichi MatsumotoYoshiyuki TakaseYoshiro Nishimura
    • Jun-ichi MatsumotoYoshiyuki TakaseYoshiro Nishimura
    • C07D487/02A61K31/435A61P31/04C07D471/04A61K31/44
    • C07D471/04Y02P20/55
    • The present invention provides a 1,8-naphthyridine compound of the formula ##STR1## wherein R is hydrogen, methyl, ethyl or propyl, and a nontoxic pharmaceutically acceptable salt thereof, and a process for preparing a 1,8-naphthyridine compound of the above formula which comprises(A) reacting a compound of the formula ##STR2## wherein Y is halogen, lower alkoxy, lower alkylthio, lower alkylsulfinyl, lower alkylsulfonyl, lower alkylsulfonyloxy or arylsulfonyloxy, and R.sub.1 is hydrogen or lower alkyl,with a compound of the formula ##STR3## wherein R.sub.2 is hydrogen or a protective group for the amino group, and R is as defined above,and when a reaction product in which R.sub.1 is lower alkyl and/or R.sub.2 is the amino protective group is obtained, treating it with an acid or base, and/or reductively cleaving it,(B) decomposing a compound of the formula ##STR4## wherein A .crclbar. is a fluorine-containing anion, and R.sub.1 and R.sub.2 are as defined above,and when a reaction product in which R.sub.1 is lower alkyl and/or R.sub.2 is the amino protective group is obtained, treating it with an acid or base, and/or reductively cleaving it,(C) treating a compound of the formula ##STR5## wherein R'.sub.1 is hydrogen or lower alkyl, R'.sub.2 is hydrogen or a protective group for the amino group, provided that R'.sub.1 and R'.sub.2 are not hydrogen atoms at the same time, and R is as defined above,with an acid or base, and/or reductively cleaving it, and optionally converting the resulting compound to a nontoxic pharmaceutically acceptable salt thereof.The 1,8-naphthyridine compound is useful as an antibacterial agent.
    • 本发明提供式IMA图示的1,8-萘啶化合物,其中R是氢,甲基,乙基或丙基,及其无毒的药学上可接受的盐,以及制备1,8-萘啶化合物的方法 其包含(A)使式(I)的化合物其中Y为卤素,低级烷氧基,低级烷硫基,低级烷基亚磺酰基,低级烷基磺酰基,低级烷基磺酰氧基或芳基磺酰氧基,R 1为氢或低级烷基, 其中R2是氢或氨基保护基的式“IMAGE”,R的定义同上,当R1是低级烷基和/或R2是氨基保护基的反应产物得到时,将其处理 (B)分解其中A( - )为含氟阴离子的式“IMAGE”的化合物,并且R 1和R 2如上所定义,当反应 其中R1是低级烷基和/或 r R2是得到的氨基保护基团,用酸或碱处理,和/或还原性地裂解它;(C)处理下式化合物其中R'1是氢或低级烷基,R'2 是氢或氨基的保护基团,条件是R 1和R 2不同时为氢原子,R为如上所定义,与酸或碱反应,和/或还原性地裂解,和 任选地将所得化合物转化为无毒的药学上可接受的盐。 1,8-萘啶化合物可用作抗菌剂。