Process for the production of penicillin G or V, cephalosporin g or V, and derivatives thereof.

摘要

Process for the production of penicillin G or V, cephalosporin g or V, and derivatives thereof.This invention describes a fermentation process for the production of derivatives of penicillin G or V or cephalosporin g or V where certain fenilbutu00edrico acid derivatives are used as aThe precursor of side chain.In the above fenilbutu00edrico acid derivatives, acyl chain extended by pairs of carbon atoms and certain substituents are present on the position and sym sym - 1.The corresponding fenoxibutu00edrico acid derivatives are used to produce derivatives of penicillin V or cephalosporin v.Optionally, the penicillin or cephalosporin compounds of G or V are desacilados to produce their counterparties desaciladas.