HR916 K (5), the 1-(S)-(pivaloyloxy)ethyl prodrug ester of the cephalosporin cefdaloxime, exhibits a significantly higher oral bioavailability than the 1-(R) diastereomer HR916 J. An efficient synthesis of HR916 K was developed. The separation of the diastereomers was achieved by precipitation of the 1-(R)-hydrochloride 9 followed by crystallization of the 1-(S)-amine 10 (de > 96%). The 1-(R) diastereomer
The present invention relates to compounds of formula I,
in which R
0
; R
1
; R
2
; R
3
; R
4
; R
5
; R
6
; R
7
; Q; V, G and M have the meanings indicated in the claims. The compounds of formula I are valuable pharmacologically active compounds. They exhibit a strong antithrombotic effect and are suitable, for example, for the therapy and prophylaxis of cardiovascular disorders like thromboembolic diseases or restenoses. They are reversible inhibitors of the blood clotting enzymes factor Xa (FXa) and/or factor VIIa (FVIIa), and can in general be applied in conditions in which an undesired activity of factor Xa and/or factor VIIa is present or for the cure or prevention of which an inhibition of factor Xa and/or factor VIIa is indicated. The invention furthermore relates to processes for the preparation of compounds of formula I, their use, in particular as pharmaceuticals for treating the foregoing conditions, and pharmaceutical preparations comprising them.
Die Erfindung betrifft kristalline Säureadditionssalze der beiden Diastereomeren des 3-Cephem-4-carbonsäure-1-(2,2-dimethylpropionyloxy)-ethylesters der allgemeinen Formel II
worin X für das Anion einer physiologisch unbedenklichen, ein- oder mehrbasischen, anorganischen oder organischen Säure und die Gruppe =N-OH in syn-Position steht, gegen bakterielle Infektionen wirksame pharmazeutische Zubereitungen, die solche Cephemderivate enthalten, Verfahren zur Herstellung der Cephemderivate, sowie die Verwendung der Cephemderivate zur Bekämpfung bakterieller Infektionen.
本发明涉及通式 II 的 3-头孢-4-羧酸 1-(2,2-二甲基丙酰氧基)乙酯的两种非对映异构体的结晶酸加成盐
其中 X 是生理上可接受的单基性或多基性无机酸或有机酸的阴离子,以及在 syn 位置上的基团 =N-OH;含有这种 cephem 衍生物的可有效防治细菌感染的药物制剂;cephem 衍生物的制备工艺;以及 cephem 衍生物在防治细菌感染方面的用途。