Abstract: The invention relates to processes for the production of intermediates for preparing 2-alkyl cephem compounds useful as antimicrobial drugs. The invention provides a process which comprises oxidating a compound of the formula (I) or a salt thereof to give a compound of the formula (II) or a salt thereof wherein each symbol is as defined in the specification.

Abstract: The present disclosure describes Cephem compounds of the formula: wherein, X is N, CH or C—Cl; T is S or the like; A and G are lower alkylene or the like; B is a single bond or the like; D is optionally present, and when present is, —NR7—, —CO—, —CO—NR7—, —NR7—CO—, —NR7—CO—NR7—, or the like; F is optionally present, and when present is or phenylene; R3 and R4 are —OR8; R5 and R6 each is independently hydrogen, halogen, nitrile, or —OR8; or an ester at the carboxyl at the 7-position side chain or at the 4-position, a compound protected at the amino on the ring in the 7-side chain, a pharmaceutically acceptable salt, or a solvate thereof, which have a wide antimicrobial spectrum and have potent antimicrobial activity against beta-lactamase producing Gram negative bacteria.

Abstract: The invention relates to processes for the production of intermediates for preparing 2-alkyl cephem compounds useful as antimicrobial drugs. The invention provides a process which comprises oxidating a compound of the formula (I) or a salt thereof to give a compound of the formula (II) or a salt thereof wherein each symbol is as defined in the specification.

Abstract: This invention provides Cephem compounds having the formula: or an ester, a protected compound at the amino on the ring in the 7-side chain, a pharmaceutically acceptable salt, or a solvate thereof, a pharmaceutical composition thereof, and a method for treating a bacterial infectious disease with the compound, the ester, the protected compound, the salt, or the solvate thereof, wherein the symbols in the formula are defined in the specification. The compounds exhibit potent antimicrobial spectrum against a variety of bacteria including Gram negative bacteria and/or Gram positive bacteria, preferably beta-lactamase producing Gram negative bacteria, more preferably, multi-drug resistant microbials, in particular, Class B type metallo-beta-lactamase producing Gram negative bacteria, and still preferably extended-spectrum beta-lactamase (ESBL) producing bacteria. The compounds most preferably do not exhibit cross-resistance against known Cephem drugs or Carbapenem drugs.

Abstract: A compound of the formula: wherein X is —N?, —CH?, or the like; W is —CH2— or the like; U is —S— or the like; R1 and R2 are each independently hydrogen, halogen, optionally substituted lower alkyl, or the like; R3 is hydrogen or the like; each R4 is independently hydrogen, halogen, or the like; m is an integer from 0 to 2; Q is a single bond, or the like; G is —C(?O)—, or the like; D is a single bond, —NH—, or the like; and E is a cyclic quaternary ammonium group, or an ester, a protected compound at the amino on the ring in the 7-side chain, a pharmaceutically acceptable salt, or a solvate thereof.

Abstract: The present invention provides Cephem compounds which have a wide antimicrobial spectrum and have potent antimicrobial activity against beta-lactamase producing Gram negative bacteria as follows: A compound of the formula: wherein, X is N, CH or C—Cl; T is S or the like; A and G are lower alkylene or the like; B is a single bond or the like; D is a single bond, —NR7—, —CO—, —CO—NR7—, —NR7—CO—, —NR7—CO—NR7—, or the like; E is optionally substituted lower alkylene; F is a single bond or optionally substituted phenylene; R3, R4, R5 and R6 each is independently hydrogen, halogene, nitrile, or the like; or an ester, a compound protected at the amino on the ring in the 7-side chain, a pharmaceutically acceptable salt, or a solvate thereof.