申请人:Asahi Kasei Kogyo Kabushiki Kaisha
公开号:EP0098609A2
公开(公告)日:1984-01-18
Novel cephalosporin compounds having antibacterial activity, which are represented by the following general formula (I),
wherein
R1 represents an amino group or a protected amino group;
Ⓐ represents a 5- or 6-membered heterocyclic ring containing therein 1 to 4 nitrogen, oxygen or sulfur atoms;
R2 represents a normal alkyl group having 1 to 6 carbon atoms, a branched alkyl group having 3 to 6 carbon atoms, an alkoxyalkyl group having 2 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon oms; a cycloalkenyl group having 3 to 6 carbon atoms; an aromatic organic residue; a 3- to 6-membered heterocyclic ring containing 1 to 4 nitrogen, sulfur or oxygen atoms or,
wherein Ra and Rb each, which may be the same or different, represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms;
R3 represents an organic residue containing an amino group or a protected amino group and a carboxyl group or a protected carboxyl group;
X represents a sulfur atom or an oxygen atom; and
R4 represents a hydrogen atom or a protective group of carboxyl group.
The compounds of the general formula (I) described above can also be used as physiologically acceptable addition salts.
The compounds exhibit excellent intestinal absorption as well as high blood concentration and longer biological half-life.
具有抗菌活性的新型头孢菌素化合物,由以下通式 (I) 表示、
其中
R1 代表氨基或受保护的氨基;
代表其中含有 1 至 4 个氮、氧或硫原子的 5 或 6 元杂环;
R2 代表具有 1 至 6 个碳原子的普通烷基、具有 3 至 6 个碳原子的支链烷基、具有 2 至 6 个碳原子的烷氧基烷基、具有 3 至 6 个碳原子的环烷基、具有 3 至 6 个碳原子的环烯基、芳香族有机残基、含有 1 至 4 个氮、硫或氧原子的 3 至 6 元杂环或、
其中 Ra 和 Rb(可以相同或不同)分别代表氢原子或具有 1 至 4 个碳原子的烷基;
R3 代表含有氨基或受保护氨基和羧基或受保护羧基的有机残基;
X 代表硫原子或氧原子;以及
R4 代表氢原子或羧基的保护基团。
上述通式(I)化合物也可作为生理上可接受的加成盐使用。
这些化合物具有良好的肠道吸收性、较高的血药浓度和较长的生物半衰期。