Improved precipitation process of 7-aminocephalosporanic...

Details Improved precipitation process of 7-aminocephalosporanic... Improved precipitation process of 7-aminocephalosporanic...

C - Chemistry, Metallurgy

07

D

C07D 501/02 (2006.01) C07D 501/00 (2006.01)

Patent

CA 2292618

A process in the isolation of 7-aminocephalosporanic acid (7-ACA) of formula (I) from an alkaline, neutral or slightly acidic medium in the presence of an additive, e.g. selected from the group comprising organic carboxylic acid esters, polymeric glycols, polyacryls, amines and polyamines, melamin-formaldehyde resins or amino acids and esters thereof to obtain 7-ACA agglomerates and/or rosettes.

L'invention concerne un procédé comprenant l'isolement d'un acide 7-aminocéphalosporanique (7-ACA) de formule (I) à partir d'un milieu alcalin, neutre ou légèrement acide en présence d'un additif, sélectionné par exemple dans le groupe formé par des esters d'acide carboxylique organique, des glycols polymériques, des polyacryles, des amines et des polyamines, des résines mélamin-formaldéhydes ou des acides aminés et leurs esters, pour obtenir des agglomérats et/ou des rosaces de 7-ACA.

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