| abstract |
PROCEDURE FOR OBTAINING A CEPHALOSPORIN SOLVATE FROM THE FORMULA: * FORMULA * IN THE <<N>> VALUE 1 OR 0; WHERE X IS ETHANOCIUM, PROPANOIC OR METHANOL WHEN <<N>> IS 0. THE OBTAINING PROCEDURE IS BASED ON CONTACT WITH A 4 '' 7-PHENOXYACETAMIC-3-HYDROXY-3-CEFEM-CARBOXYLATE SULFIDE - NITROBENZYL OR A SULFOXIDE THEREOF WITH ACETIC OR PROPIONIC ACID IN THE PRESENCE, OPTIONAL, OF A SOLVENT. SUBSEQUENTLY, A METHYLENE CHLORIDE SOLVATE IS CRYSTALIZED, WHICH IS SEPARABLE BY FILTRATION. THESE COMPOUNDS ARE USED IN MEDICINE AS ANTIBIOTICS. B |