A novel series of parenteral cephalosporins exhibiting potent activities against both Pseudomonas aeruginosa and other Gram-negative pathogens. Part 2: Synthesis and structure–activity relationships
摘要:
A novel series of 7 beta-[2-(2-amino-5-chloro-thiazol-4-yl)-2(Z)-((S)-1-carboxyethoxyimino)acetamido]cephalosporins bearing various pyridinium groups at the C-3' position were synthesized and their in vitro antibacterial activities against Gram-negative pathogens including Pseudomonas aeruginosa and several Gram-positive pathogens were evaluated. Among the cephalosporins prepared, we found that a cephalosporin bearing the 2- amino-1-(3-methylamino-propyl)-1H-imidazo[4,5-b] pyridinium group at the C-3' position (8a) showed potent and well-balanced antibacterial activities against P. aeruginosa and other Gram-negative pathogens including the strains which produce class C beta-lactamase and extended spectrum beta-lactamase (ESBL). Compound 8a also showed efficacious in vivo activity and high stability against AmpC beta-lactamase. These findings indicate that 2-aminoimidazopyridinium having an aminoalkyl group at the 1-position as a C-3' side chain is suitable for cephalosporins bearing an aminochlorothiazolyl moiety and a carboxyethoxyimino moiety on the C-7 side chain. (C) 2007 Elsevier Ltd. All rights reserved.
A novel series of parenteral cephalosporins exhibiting potent activities against both Pseudomonas aeruginosa and other Gram-negative pathogens. Part 2: Synthesis and structure–activity relationships
摘要:
A novel series of 7 beta-[2-(2-amino-5-chloro-thiazol-4-yl)-2(Z)-((S)-1-carboxyethoxyimino)acetamido]cephalosporins bearing various pyridinium groups at the C-3' position were synthesized and their in vitro antibacterial activities against Gram-negative pathogens including Pseudomonas aeruginosa and several Gram-positive pathogens were evaluated. Among the cephalosporins prepared, we found that a cephalosporin bearing the 2- amino-1-(3-methylamino-propyl)-1H-imidazo[4,5-b] pyridinium group at the C-3' position (8a) showed potent and well-balanced antibacterial activities against P. aeruginosa and other Gram-negative pathogens including the strains which produce class C beta-lactamase and extended spectrum beta-lactamase (ESBL). Compound 8a also showed efficacious in vivo activity and high stability against AmpC beta-lactamase. These findings indicate that 2-aminoimidazopyridinium having an aminoalkyl group at the 1-position as a C-3' side chain is suitable for cephalosporins bearing an aminochlorothiazolyl moiety and a carboxyethoxyimino moiety on the C-7 side chain. (C) 2007 Elsevier Ltd. All rights reserved.
NOVEL CEPHEM COMPOUND HAVING CATECHOL OR PSEUDO-CATECHOL STRUCTURE
申请人:Shionogi & Co., Ltd.
公开号:EP2703406A1
公开(公告)日:2014-03-05
The present invention provides a novel compound which has a wide antimicrobial spectrum, and in particular exhibits potent antimicrobial activity against beta-lactamase producing Gram negative bacteria. Specifically, the present invention provides a compound of the formula (I):
wherein each symbol is as defined in the specification,
or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition comprising the same.
A compound of Formula 1:
(wherein A is optionally substituted lower alkylene (substituent: mono- or di-lower alkyl, lower alkylidene, or lower alkylene having two or more carbons); Z
+
is either of the groups shown below:
(wherein R
1
and R
2
are each independently hydrogen, optionally substituted amino lower alkyl, optionally substituted aminocycloalkyl, optionally substituted cyclic amino, or optionally substituted cyclic amino lower alkyl; R
9
is hydrogen or lower alkyl, or R
1
and R
9
taken together with an adjacent N atom may form optionally substituted cyclic amino; R
3
is hydrogen or amino; X is N or CR
4
(R
4
is hydrogen or optionally substituted lower alkyl)), a pharmaceutically acceptable salt or a solvate thereof.