New starting compounds for preparing analogous compounds of cephalosporins and processes for their preparation
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0070575A2
公开(公告)日:1983-01-26
Starting compounds of the formula
in which W is a protected amino group and
Y is -S-Ag or -S-R5, wherein R5 is a mercaptoprotec- tive group, or
W and Y are combined together to form a group of the formula:
wherein Ra is a residue excluded a radical «-CONH-» from acylamino, and
Z is a group of the formula:
wherein
R3 is carboxy or a protected carboxy group and
Z1 is azido, hydroxy, amino, formamido, isocyano or halogen,
provided that,
when W and Y are combined together to form a group of the formula:
wherein Ra is as defined above,
then Z is a group of the formula:
wherein R3 is as defined above.
or salts thereof and their preparation. They can be used for preparing analogous compounds of cephalosporins.
式的起始化合物
其中 W 是受保护的氨基,且
Y 是 -S-Ag 或 -S-R5,其中 R5 是巯基,或
W 和 Y 结合在一起形成式中的基团:
其中 Ra 为从酰氨基中排除自由基"-CONH-"的残基,以及
Z 是式中的一个基团:
其中
R3 是羧基或受保护的羧基,以及
Z1 是叠氮、羟基、氨基、甲酰胺基、异氰基或卤素、
条件是
当 W 和 Y 结合在一起形成式中的一个基团时:
其中 Ra 如上文所定义、
则 Z 是式中的基团:
其中 R3 如上定义。
或其盐及其制备方法。它们可用于制备头孢菌素的类似化合物。