Abstract:
The present invention relates to a process for preparation of highly pure amorphous and crystalline forms of cefditoren pivoxil and pharmaceutical compositions comprising highly pure amorphous and crystalline forms of cefditoren pivoxil. The present invention also relates to a method of treating infections using highly pure amorphous and crystalline forms of cefditoren pivoxil. The highly pure cefditoren pivoxil has a purity greater than 98.5% and contains less than 1.0% of the E-isomer impurity and less than 1 % of the Delta isomer impurity.
Abstract:
Cephem compounds of the general formula (I) or their pharmaceutically acceptable salts: (I) wherein R1 and R2 are each independently hydrogen, nitro, or cyano; R3 is optionally carboxylated C1-6 alkyl; R4 is hydrogen or amino; and X is S- or SO-, with the proviso that the cases wherein both of R1 and R2 are simultaneously hydrogen are excepted.
Abstract:
The present invention relates to a novel cephalosporin compound, and pharmaceutically acceptable non-toxic salt, physiologically hydrolysable ester, hydrate, solvate or isomer thereof, to a pharmaceutical composition containing the compound and to a process for preparing the compound.
Abstract:
The invention relates to a new process for the preparation of a vinyl-pyrrolidinone cephalosporine derivative of formula (I). The compound of formula (I), prepared according to the invention, can be used for the treatment and prophylaxis of infectious diseases, especially infectious diseases caused by bacterial pathogens in particular methicillin resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa.
Abstract:
The present invention relates to novel processes for the preparation of 3-methylenecephams. More specifically, the present invention relates in part to the intramolecular cyclization of penicillin sulfoxide derived monocyclic azetidinone derivatives either thermally or with lanthanide metal salt catalysts.
Abstract:
A compound of formula (I), wherein R2 together with the nitrogen atom to which it is attached forms a cyclic aminoguanidine group or derivative thereof and the other substituents have various meanings, useful as a pharmaceutical.
Abstract:
Yellow and powdery compositions consisting of particles composed of a homogeneous mixture of amorphous cefditoren pivoxil with a water-soluble polymer additive and being orally administrable. These compositions can be obtained by dissolving the amorphous cefditoren pivoxil and the water-soluble polymer in an aqueous solution of an acid, neutralizing, coprecipitating, and then drying the thus obtained precipitate followed by the recovery of the product.
Abstract:
There are disclosed new compounds of formula (I), wherein R is: a hydrogen atom; a linear or branched C1-C4 alkyl group, unsubstituted or substituted by at least a phenyl group or at least a hydrogen atom; a benzyl group substituted by at least a linear or branched C1-C4 alkyl or alkoxy group or a nitro group; a silyl substituted by at least a linear or branched, unsubstituted or substituted C1-C4 alkyl group; n is 0 or 1; and Y is a radical of formula (II), wherein A is H, OH, Cl, CH2, CH2X, where X is F, Cl, Br, I, OH or OR' and R' is COCH3 or a linear or branched, unsubstituted or substituted C1-C4 alkyl group and ... represents a single or a double bond, with the proviso that when n=0 and R is H, R' is not a methyl group; and processes for obtaining them.