The synthesis and optimization of the anti-Helicobacter pylori activity of a novel series of cephem derivatives are described. Introduction of thio-heterocyclic groups containing N- and S-atoms to the 3-position and phenyl or thienyl acetamido groups to the 7-position of the cephem nucleus dramatically improved the activity. From this series of derivatives, compound 13i was Found to have extremely potent in vitro anti-H. pylori activity, superior therapeutic efficacy compared to AMPC and CAM, no cross-resistance between CAM or MNZ and low potential for causing diarrhea due to instability to beta-lactamase. (C) 2000 Elsevier Science Ltd. All rights reserved.
CEPHALOSPORIN INTERMEDIATES
申请人:BIOCHEMIE GESELLSCHAFT M.B.H.
公开号:EP1278754A1
公开(公告)日:2003-01-29
US6787649B2
申请人:——
公开号:US6787649B2
公开(公告)日:2004-09-07
[EN] CEPHALOSPORIN INTERMEDIATES<br/>[FR] INTERMEDIAIRES DE LA CEPHALOSPORINE
申请人:BIOCHEMIE GMBH
公开号:WO2001083491A1
公开(公告)日:2001-11-08
A process and intermediates in the production of cefotiam (hexetil).