Semisynthetic .BETA.-lactam antibiotics. IV. Synthesis and antibacterial activity of new ureidocephalosporin and ureidocephamycin derivatives containing a catechol moiety or its acetate.
Improvements in or relating to beta lactam production
申请人:BIOCHEMIE Gesellschaft m.b.H.
公开号:EP0523585A2
公开(公告)日:1993-01-20
A new process is described for the production of 7-alpha-aminoacylcephalosporin free from halogen-containing solvents by acylating 7-amino-ceph-3-em-4-carboxylic acid or a derivative thereof in a halogen-free solvent.