摘要:
The treatment of neurological disorders using cefazolin compositions and pharmaceutical compositions including oral dosage forms that include cefazolin compositions are described.
摘要:
The treatment of neurological disorders using cephalosporin sulfoxide-containing and/or cephalosporin sulfone-containing compositions and pharmaceutical compositions including oral dosage forms that include cephalosporin sulfoxide and/or sulfone-containing compositions are described.
摘要:
Substrates for null-lactamase of the general formula I 1 in which one of X and Y is a fluorescent donor moiety and the other is a quencher (which may or may not re-emit); Rnull is selected from the group consisting of H, lower (i.e., alkyl of 1 to about 5 carbon atoms) and (CH2)nOH, in which n is 0 or an integer from 1 to 5; Rnull is selected from the group consisting of H, physiologically acceptable metal and ammonium cations, nullCHR2OCO(CH2)nCH3, nullCHR2OCOC(CH3)3, acylthiomethyl, acyloxy-alpha-benzyl, delta-butyrolactonyl, methoxycarbonyloxymethyl, phenyl, methylsulphinylmethyl, beta-morpholinoethyl, dialkylaminoethyl, acyloxyalkyl, dialkylaminocarbonyloxymethyl and aliphatic, in which R2 is selected from the group consisting of H and lower alkyl; A is selected from the group consisting of S, O, SO, SO2 and CH2; and Znull and Znull are linkers for the fluorescent donor and quencher moieties. Methods of assaying null-lactamase activity and monitoring expression in systems using null-lactamase as a reporter gene also are disclosed.
摘要:
An improved process for the preparation of an antibiotic substance, more specifically 7{[2-(2-aminothiazol-4-yl)-2-synmethoxyimino]acetamido}-3-{[(2,5-dihydro-6-hydroxy-2-methyl-5-oxo-1,2,4-triazin-3-yl)thio]methyl}-3-cephem-4-carboxylic acid in the form of disodium salt hemieptahydrate is described, where 7-amino-3-{[(2,5-dihydro-6-hydroxy-2-methyl-5-oxo-1,2,4-triazin-3-yl)thio]methyl}-3-cephem-4-carboxylic acid is made to react with 2-mercaptobenzothiazole 2-(2-aminothiazol-4-yl)-2-syn-methoxyiminoacetate in an aqueous solution in suitable solvents, in the presence of an amine selected from the group consisting of trimethylamine, triethylamine, 1,4-dimethylpiperazine, N-ethylpiperidine, pyridine and dimethylaminopyridine and the obtained aqueous solution is treated with a base selected from the group consisting of dicyclohexylamine, diphenylamine, diisopropylamine, N-tert-butylcyclohexylamine and N,N-dibenzylethylendiamine, in a suitable form, and the thus formed precipitate is reacted in suitable solvents with sodium 2-ethylhexanoate to give the desired compound.
摘要:
Cephalosporin compounds having a 3-position substituent of the formula (I) are described:--CH.sub.2 --Y--Q (I)wherein Y is a linking group --NR.sup.4 CO--Y'--, --NR.sup.4 SO.sub.2 --Y'--, --OCO--Y;-- or --SCO--Y'-- wherein R.sup.4 is hydrogen, various optionally substituted alkyl groups or alkenyl and Y' is a bond or various optionally substituted alkylene or alkenylene groups; and Q is a benzene ring (optionally fused to a further benzene ring so forming a naphthyl group or optionally fused to a 5 or 6 membered heterocyclic aromatic group containing 1, 2 or 3 heteroatoms selected from nitrogen, oxygen and sulphur), said benzene ring (or in the case of naphthyl either benzene ring) being substituted by groups R.sup.1 and R.sup.2 which are ortho with respect to one another, wherein R.sup.1 is hydroxy or an in vivo hydrolyzable ester thereof and R.sup.2 is hydroxy, an in vivo hydrolyzable ester thereof, carboxy, sulpho, hydroxymethyl, methanesulphonamido or ureido; or Q is a group of the formula (II) or (III): ##STR1## wherein M is oxygen or a group NR.sup.3 wherein R.sup.3 is hydrogen or C.sub.1-4 alkyl; ring Q being further optionally substituted.The use of such compounds as antibacterial agents is described as are processes for their preparation and intermediates therefor.
摘要:
The present invention relates to novel cephalosporin derivatives, processes for preparing thereof, compositions for preventing and/or treating infectious diseases which comprise the novel cephalosporin derivatives as active components, and the intermediate compounds in the synthesis of cephalosporin derivatives and processes for producing thereof.The present invention is based on the selection of groups containing a condensed heterocyclic ring, particularly a triazolopyrimidine ring or a thiadiazolopyrimidine ring, as substituents at the 3-position of the cephem skeleton, and of groups containing a catechol moiety, particularly a catechol carboxymethyloxyimino moiety or a catechol carboxyimino moiety, as substituents at the 7-position of the cephem skeleton.The compounds of the present invention containing the aforementioned substituents have a strong antibacterial activity against Gram-negative bacteria and also against Gram-positive bacteria including methicillin-resistant Staphylococcus aureus. These compounds are extremely useful for the treatment of infectious diseases.
摘要:
The present invention relates to derivatives of the cephalosporin family, of formula: ##STR1## in which: X is an oxygen atom or a sulfur atomn is zero, 1 or 2.R.sub.1, R.sub.2 and R.sub.3 each designate, a hydrogen atom or else R.sub.1 and R.sub.2 designate a hydrogen atom or a methyl group, and R.sub.3 designates a carboxyl or cyclopropyl group, or elseR.sub.1 and R.sub.2 taken together with the carbon atom to which they are linked form a cyclobutyl or cyclopentyl group and R.sub.3 is a carboxyl group.B is the residue of a primary or secondary amine;their preparation process and application in therapeutics.
摘要:
The present invention relates to novel cephalosporin derivatives, processes for preparing thereof, compositions for preventing and/or treating infectious diseases which comprise the novel cephalosporin derivatives as active components, and the intermediate compounds in the synthesis of cephalosporin derivatives and processes for producing thereof.The present invention is based on the selection of groups containing a condensed heterocyclic ring, particularly a triazolopyrimidine ring or a thiadiazolopyrimidine ring, as substituents at the 3-position of the cephem skeleton, and of groups containing a catechol moiety, particularly a catechol carboxymethyloxyimino moiety or a catechol carboxyimino moiety, as substituents at the 7-position of the cephem skeleton.The compounds of the present invention containing the aforementioned substituents have a strong antibacterial activity against Gram-negative bacteria and also against Gram-positive bacteria including methicillin-resistant Staphylococcus aureus. These compounds are extremely useful for the treatment of infectious diseases.
摘要:
A process for the preparation of cefodizime of the formula ##STR1## wherein (a) a compound of the formula II (ATS) ##STR2## wherein R.sub.1 represents hydrogen or an aminoprotective group and A represents a hydrogen atom or one equivalent of an alkali metal or alkaline earth metal, of ammonium or of an organic nitrogen base, is first reacted with a compound of the formula IIIR--SO.sub.2 Hal wherein R represents an optionally substituted alkyl, aryl or aralkyl radical and Hal represents a halogen atom, in an organic solvent and, if appropriate, in the presence of a base,(b) a compound of the formula I (TACS) ##STR3## in which A has the above meaning, is reacted with a silylating agent in an organic solvent and, if appropriate, in the presence of a base, and(c) the two products formed in (a) and (b) are reacted in their reaction solutions, and any protective group R.sub.1 present in the end product of the formula I is eliminated.
摘要:
Cephalosporin compounds having 2-(2-aminothiazol-4-yl)-2{(1S)-carboxyethoxyimino}acetyl group on the side chain at the 7-position thereof and 1-ethylpyridinium-4-ylthiomethyl group on the side chain at the 3-position thereof or non-toxic salts thereof are excellent antibacterial agents for mammals including human. The cephalosporin derivatives have low toxicity.