Process for preparing 63-carboxyamides of teicoplanin antibiotics.

摘要

The present invention is directed to an improved process for preparing 63 carboxyamides of teicoplanin (eventually having <1><5>-N-alkyl substituents) by reacting a teicoplanin like compound with an activated ester forming reagent to give an ester function which is substituted by an amine, by contacting an excess of said amine in an organic polar solvent at a temperature comprised between 5 DEG C and 60 DEG C.