-Acylamino cephalosporins compounds are described. They have the following formula
wherein R is hydrogen or an acyl group of the formula
wherein R' is hydrogen, C1-C4 alkyl, or C1-C4 alkyl substituted by halogen or cyano; or R' is a group of the formula
wherein R1 is phenoxy, phenylthio, phenyl, hydroxyphenyl, halophenyl, halo-substituted-hydroxyphenyl, or C1-C4 alkylphenyl, thienyl, furyl, or 2-aminothiazol-4-yl, a is hydrogen; b is hydrogen, hydroxy or amino, and a and b when taken together form an oximino group of the formula
wherein R2 is hydrogen, C1-C4 alkyl or a group of the formula
wherein R3 and R4 independently are hydrogen, C1-C4 alkyl, or R3 and R4 when taken together with the carbon atom to which they are attached form a four, five or six-membered carbocyclic ring; R5 is hydrogen or a carboxy protecting group; and the pharmaceutically acceptable salts thereof.
The compounds are broad spectrum antibiotics and are prepared by reacting the appropriate 3-substituted acyloxy or halo intermediate with 1-cyanomethyl-1H-tetrazole-5-thiol.
-描述了乙酰
氨基
头孢菌素化合物。它们具有下式
其中 R 是氢或式中的酰基
其中 R' 是氢、C1-C4 烷基或被卤素或
氰基取代的 C1-C4 烷基;或 R' 是式中的基团
其中 R1 是苯氧基、苯
硫基、苯基、羟基苯基、卤代苯基、卤代-羟基苯基或 C1-C4 烷基苯基、
噻吩基、
呋喃基或
2-氨基噻唑-4-基,a 是氢;b 是氢、羟基或
氨基,a 和 b 合在一起形成式中的氧亚
氨基基团
其中 R2 是氢、C1-C4 烷基或一个式中的基团
其中 R3 和 R4 分别为氢、C1-C4 烷基,或 R3 和 R4 与它们所连接的碳原子一起形成四元、五元或六元碳环;R5 为氢或羧基保护基团;及其药学上可接受的盐。
这些化合物是广谱抗生素,通过适当的 3-取代酰氧基或卤代中间体与 1-
氰甲基-
1H-四唑-5-
硫醇反应制备。