Starting compounds for preparing cephem compounds and processes for their preparation
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0009671A2
公开(公告)日:1980-04-16
Compounds of formula (I) are used in the preparation of cephalosporins of formula (II) which are precursors of cephalosporins of formula (III) which show a pharmacological activity:
wherein:
X' = hydrogen or halogen
A1, A2 = acetal residue which may be linked together
R, = aliphatic hydrocarbon group which may have suitable substituents
Y' = carbonyl or protected carbonyl group
R2 = carboxyl or protected carboxyl group
R. = hydroxy, acyloxy or methylene
Intermediate compounds for preparing cephem compounds; processes for their preparation and processes for preparing cephem compounds
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0048504A2
公开(公告)日:1982-03-31
New intermediate compounds for preparing cephem compounds, particularly of the formula
or its salt. The new intermediate compounds can be prepared by different processes, and the cephem compounds, which possess valuable pharmacological properties, can be prepared from such new intermediate compounds.