A process for preparing a compound of EC falosporina

摘要

Procedure for obtaining a cephalosporin Compound of formula (i), or salts thereof, wherein R1 is a nitrogen-containing Heterocyclic radical - Uncle; R2 is Hydrogen, Hydroxy, and R3, R4 and R5 is Hydrogen, Hydroxy, or aciloxi.Based on the condensation reaction of a compound of formula (i) or its Salt, a compound of formula (iii), in which R1, R2, R3, R4 and R5 have the meanings indicated above. The reaction is carried out in an Inert Organic Solvent, in the presence or absence of a basic sililacion Reagent and at a temperature between 50 - 50 GC and GC.These compounds have pharmacological applications for its antibacterial activity. * * formula