Cephalosporin derivatives, methods of production thereof and...

C - Chemistry – Metallurgy – 07 – D

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C07D 501/32 (2006.01) A61K 31/545 (2006.01) C07D 501/04 (2006.01) C07D 501/24 (2006.01) C07D 501/34 (2006.01) C07D 501/36 (2006.01) C07D 501/44 (2006.01) C07D 501/46 (2006.01) C07D 501/54 (2006.01)

Patent

CA 1239928

ABSTRACT A cephalosporin derivative of the general formula Image (I) wherein R1 is an .alpha.=, .beta.- or .gamma.-amino acid residue (bonded by the ester linkage), which may optionally be substituted by one or two lower alkyl groups at the amino group thereof, R2 is an 1-alkanoyloxyalkyl, 1-alkoxycarbonyloxyalkyl, phthalidyl or 5-methyl-1,3-dioxolen-2-on-4-ylmethyl group, R3 is a carbamoyloxymethyl group, which may optionally be substituted by one or two lower alkyl groups, or a hetero- cyclothiomethyl group, which may optionally be substituted by one or more appropriate substituents, and R4 is a hydrogen atom or a hydroxy group, or its non-toxic salt are found to be useful as orally administrable antibiotics having broad antimicrobial activities against both gram- positive and gram-negative bacteria.

439358

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