New starting compounds for the preparation of cephem compounds and processes for preparation thereof
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0156118A1
公开(公告)日:1985-10-02
A compound of the formula:
wherein R1 is amino or a protected amino group,
X is N or CH, and
R5 is ethyl, cyclo (lower) alkyl, cyclo (lower) alkenyl, lower alkyl having a protected carboxy group, lower alkynyl or lower alkylthio(lower)alkyl,
provided that X is N when R5 is lower alkynyl and
R' is amino when R5 is ethyl, or a salt therof, and processes fortheir preparation. The compounds are useful as starting material for the preparation of pharmaceutically active cephem compounds.
式中 R1 为氨基或受保护的氨基,X 为 N 或 CH,R5 为乙基、环(低级)烷基、环(低级)烯基、具有受保护的羧基的低级烷基、低级炔基或低级烷硫基(低级)烷基(当 R5 为低级炔基时,X 为 N;当 R5 为乙基时,R'为氨基)的化合物或其盐及其制备方法。 这些化合物可用作制备具有药用活性的头孢化合物的起始原料。