Intermediates useful for preparing cephem compounds and...

Details Intermediates useful for preparing cephem compounds and... Intermediates useful for preparing cephem compounds and...

C - Chemistry, Metallurgy

07

D

260/108

C07D 501/18 (2006.01)

Patent

CA 1338820

Compounds of the formula: Image wherein R3 is lower alkyl, hydroxy (lower) alkyl or a protected hydroxy (lower) alkyl, R4 is amino or a protected amino group, and R5 is hydrogen or lower alkyl. The salts of these compounds and the prep- aration of the compounds are also disclosed. These compounds are useful intermediates for the preparation of cephem compounds which are highly active against a number of pathogenic microorganisms.

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