申请人:SMITHKLINE BEECHAM PLC
公开号:EP0672670A1
公开(公告)日:1995-09-20
A process for the preparation and/or purification of clavulanic acid or a pharmaceutically acceptable salt or ester thereof comprises
i) contacting impure clavulanic acid or an alkali metal salt thereof in an organic solvent, with an amine of formula (II)
where R¹ is a group of general formula
where R⁴ and R⁵ are independently hydrogen, alkyl, amino-substituted alkyl or substituted amino-substituted alkyl, and R² and R³ are independently selected from hydrogen, alkyl, amino- or hydroxy-substituted alkyl or substituted amino-substituted alkyl, and m is zero or an integer 1 to 5;
ii) isolating the amine salt of clavulanic acid formed;
iii) converting the thus formed salt into clavulanic acid or a pharmaceutically acceptable salt or ester thereof.
制备和/或纯化克拉维酸或其药学上可接受的盐或酯的工艺包括
i) 将有机溶剂中的不纯克拉维酸或其碱金属盐与式 (II) 的胺接触
其中 R¹ 为通式基团
其中 R⁴ 和 R⁵ 独立地为氢、烷基、氨基取代的烷基或取代的氨基取代的烷基,且 R² 和 R³ 独立地选自氢、烷基、氨基或羟基取代的烷基或取代的氨基取代的烷基,且 m 为零或 1 至 5 的整数;
ii) 分离所形成的克拉维酸胺盐;
iii) 将由此形成的盐转化为克拉维酸或其药学上可接受的盐或酯。