摘要:
The present invention relates to new cephalosporins of the formula
wherein R¹ and R² are hydrogen or carboxy, with the proviso that both cannot be the same; R³ is hydrogen or acetyl; and R⁴ is a radical selected from the group consisting of
or -CH=CH-CH₂-R⁶ in which n is 1 or 2, R⁵ is hydrogen or acetyl, and R⁶ is hydrogen, a lower C₁₋₃ alkyl, or a radical selected from the group consisting of
in which n and R⁵ are as defined above. In another aspect, this invention relates to processes for the preparation of the compounds of Formula I, to pharmaceutical compositions containing at least one compound of Formula I, and to intermediates in their preparation.
摘要:
The present invention relates to new cephalosporins of the formula
wherein R¹ and R² are hydrogen or carboxy, with the proviso that both cannot be the same; R³ is hydrogen or acetyl; and R⁴ is a radical selected from the group consisting of
or -CH=CH-CH₂-R⁶ in which n is 1 or 2, R⁵ is hydrogen or acetyl, and R⁶ is hydrogen, a lower C₁₋₃ alkyl, or a radical selected from the group consisting of
in which n and R⁵ are as defined above. In another aspect, this invention relates to processes for the preparation of the compounds of Formula I, to pharmaceutical compositions containing at least one compound of Formula I, and to intermediates in their preparation.