Lucky Limited

Duk H Yang

Jong Chan Lim

Yong Z Kim

Jae H Yeo

Chan S Bang

Hun S Oh

Young M Woo

Sam S Kim

Se Hun Kim

Tae Hee Lee

Jae Hwan Jeon

Hyeon Joo Yim

Jae Wang Lee

Mi K Seo

Sung I Kim

The present invention relates to a cephalosporin compound represented by the following general formula (I), its pharmaceutically acceptable non-toxic salt, physiologically hydrolyzable ester, hydrate or solvate, or isomers thereof, which is useful as an antibiotic agent: ##STR1## in which R.sup.1 represents hydrogen or an amino-protecting group,

Cephalosporin antibiotics and processes for preparation thereof

The present invention relates to novel cephalosporin compounds, pharmaceutically acceptable non-toxic salts, physiologically hydrolyzable esters, hydrates and solvates and isomers thereof which possess potent and broad antibacterial activities. The compounds of the present invention have a (4-amino-1-substituted-alkapyrimidinium-4-yl)thiomethyl group in 3-position of the cephem nucleus and is specifically represented by the following formula(I): ##STR1## wherein: R.sup.1 is a hydrogen atom or a C.sub.1-4 alkyl, C.sub.2-4 alkenyl, C.sub.2-4 alkynyl or --C(R.sup.A)(R.sup.B)COOH group wherein R.sup.A and R.sup.B are independently a hydrogen atom or a C.sub.1-4 alkyl group, or form a C.sub.3-7 cycloalkyl group together with the carbon atom to which they are attached;

Cephalosporin compounds

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Daejeon, South Korea

Duk H Yang