Novel bicyclic .beta.-lactams and intermediates useful in their preparation are disclosed. In particular, 7.beta.-acyl-amino- and 7.beta.-amino-8-oxo-4-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acids are prepared. The acylated compounds are antibacterial agents.
Cis-4-oxoazetidine intermediates and methods of preparing them
申请人:SmithKline Corporation
公开号:US04072674A1
公开(公告)日:1978-02-07
The stereospecific cycloaddition of nitrogen containing acetic acid halides or anhydrides with Schiff bases having a carbalkoxy group substituted on the methine carbon atom offers new intermediates and methods for preparing synthetic cephalosporin congeners having antibacterial activity.
Monocyclic beta-lactams with antibacterial activity
申请人:SmithKline Corporation
公开号:US04144333A1
公开(公告)日:1979-03-13
A monocyclic .beta.-lactam containing a cis-.beta.-acylamino moiety as in the penicillin and cephalosporin antibacterials is disclosed. These compounds have antibacterial activity against a variety of Gram-positive and Gram-negative organisms. Intermediates useful for the preparation of these antibacterials are also disclosed.
Substituted azetidine intermediates for preparing novel bicyclic .beta.-lactam penicillin analogs which have antibacterial activity are disclosed.
公开了用于制备具有抗菌活性的新型双环β-内酰胺青霉素类似物的替代氮杂环丙烷中间体。
3-Substituted-6.beta.-(amino- and acylamino)-7-oxo-1,3-diazabicyclo[3.2.0]-
申请人:SmithKline Corporation
公开号:US04000154A1
公开(公告)日:1976-12-28
Novel bicyclic .beta.-lactam penicillin analogs which have antibacterial activity and intermediates for the synthesis thereof are disclosed. In particular, 3-acetyl-7-oxo-6.beta.-phenoxyacetylamino-1,3-diazabicyclo[3.2.0]heptane-2 -carboxylic acid and derivatives thereof are prepared.