| abstract |
The present invention relates to new cephalosporin compounds of the formula (I), pharmaceutically acceptable non-toxic salts thereof, and physiologically hydrolyzable esters and solvates thereof, which have potent and broad antibacterial activities <CHEM> wherein R<1> is a C1 SIMILAR 4 alkyl, C3 SIMILAR 4 alkenyl, C3 SIMILAR 4 alkynyl group or -C(R<a>)(R<b>)CO2H, wherein R<a> and R<b> are the same or different, and each is a hydrogen atom or a C1 SIMILAR 4 alkyl group, or R<a> and R<b> form a C3 SIMILAR 7 cycloalkyl group with the carbon atom to which they are linked; R<2> is a C1 SIMILAR 4 alkyl, C3 SIMILAR 4 alkenyl or C3 SIMILAR 4 cycloalkyl group, a substituted or unsubstituted amino group, or a substituted or unsubstituted phenyl group; R<3> is hydrogen or a C1 SIMILAR 4 alkyl group, and Q is N or CH; The invention further relates to a process for preparing said compounds, and to pharmaceutical compositions containing said compounds. |