摘要:
Crystalline (7R)-7-amino-3-(1'-pyridinium methyl-3-cephem-4-carboxylate monohydrate compound is an intermediate in the synthesis of the cephalosporin antibiotic ceftazidime.
摘要:
Cephalosporinderivate der allgemeinen Formel gegen bakterielle Infektionen wirksame pharmazeutische Präparate, die solche Cephemderivate enthalten, Verfahren zur Herstellung der Cephemderivate und der pharmazeutischen Präparate und Verwendung der Cephemderivate zur Bekämpfung bakterieller Infektionen.
摘要:
Kristallisierte Cephem-Säureadditionssalze der allgemeinen Formel gegen bakterielle Infektionen wirksame pharmazeutische Präparate, die solche Cephemderivate enthalten, Verfahren zur Herstellung der Cephemderivate und der pharmazeutischen Präparate und Verwendung der Cephemderivate zur Bekämpfung bakterieller Infektionen.
摘要:
a Ceftazidime pentahydrate is obtained in purified crystalline form in a process comprising acidification of an aqueous solution of ceftazidime to about the optimum pH for nucleation of between about 4.0 and about 4.7 and maintenance at the optimum pH during crystallization. The crystalline product obtained exhibits enhanced stability toward polymer formation when stressed.
摘要:
A compound having the formula: wherein R 1 is a straight chain, branched chain or cyclic lower alkyl group which may be substituted by a carboxyl group, and each of R 2 , R 3 and R 4 which may be the same or different, is a hydrogen atom, a hydroxyl group, a methoxy group or an acetoxy group; or a pharmaceutically acceptable salt, physiologically hydrolyzable ester or solvate thereof.
R' is amino or protected amino, R 2 is hydrogen, hydroxy protective group, lower alkyl, dihalogenated lower alkyl, cyclo(lower)alkenyl, thietanyl, carboxy(lower)alkyl or protected carboxy(lower)alkyl, R 3 is lower alkyl, R 4 and R 5 are each hydrogen, lower alkyl, hydroxy (lower)alkyl, lower alkoxy, amino or protected amino, R 6 is COO e , carboxy or protected carboxy, X ⊖ is an anion, and n is 0 or 1, with certain provisions, processes for their preparation and pharmaceutical compositions containing them. The invention relates also to compounds of the formula and of the formula in which Z is an acid residue.
摘要:
A compound of the formula; Wherein R 0 stands for hydrogen atom, nitrogencontaining heterocyclic group, acyl group or aminoprotecting group, Z stands for S, S→O, 0 or CH 2 , R 4 stands for hydrogen atom, methoxy group or formamido group, R 13 stands for hydrogen atom, methyl group, hydroxyl group or halogen atom and A stands for an optionally substituted pyrazol-2-yl group forming a fused ring at the 1,5-position or a physiologically or pharmaceutically acceptable salt or ester thereof. This compound is novel and has excellent antibacterial activity.