--LAKTAM, DESS FRAMSTAELLNING OCH MELLANPRODUKTER FOER DESS FRAMSTAELLNING.

摘要

There are disclosed a beta -lactam compound represented by the formula (I): wherein R1 represents an acyl group; M represents a hydrogen atom, a protective group or an eliminatable group which is easily hydrolyzable in a human body; B represents a group represented by the formula (b): where at least one of R2, R3 and R9 represent a group represented by the formula: -A-OR4 where R4 represents a hydrogen or a lower alkyl group; and A represents a straight or branced alkylene group having 1 to 6 carbon atoms; and a remaining group or groups are each independently a hydrogen atom; a cyano group; a lower alkyl group which may be substituted by a halogen atom; a carbamoyl group which may be substituted by a lower alkyl group; a cycloalkyl group; or a carboxyl group which may be substituted by a protective group or an eliminatable group which is easily hydrolyzable in a human body, and also when R9 is -A-OR4, R2 and R3 may be combined with each other to form an alkylene group having 3 to 4 carbon atoms; and Z represents a nitrogen atom or a group represented by the formula: C-R10 where R10 represents a hydrogen atom, a carboxyl group or a lower alkyl group which may be substituted by a hydroxy group or a lower alkoxy group, or its pharmaceutically acceptable salt, and a process for preparing the same, an intermediate for synthesis of the same and a medicinal composition for bacterially infectious disease therapy containing the same.