New Derivatives of 2 - alkoxy - imino acids (- 2 - amino - (1,2,4) - tiadiazolil acetamido) - to prepare, process and Procedure to prepare 7 - (2 - (2 - alkoxy - imino amino (- 1.2, -Tiadiazolil) - (4) - 3-cephem-4-carboxylic - from carboxylic derivatives

摘要

This invention relates to new 7-substituted-3-cephem-4- carboxylic acids and pharmaceutically acceptable salts thereof, which have antimicrobial activities, and processes for preparation thereof, to intermediates for preparing the same and processes for preparation thereof, and to pharmeceutical compositions comprising the same and methods of using the same prophylactically and therapeutically for treatment of infectious diseases in human beings and animals.