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Matches 501 - 550 out of 6,498

Document Document Title
WO/1996/023798A1
A cephem compound of formula (1) wherein R1 is an optionally protected amino group; R2 is H or a group bonded through a carbon atom; A+ is an optionally substituted group of formula (2) or (3) (wherein B is a 6-membered aromatic heterocy...  
WO/1996/023897A1
The invention relates to a process for the preparation of a 'beta'-lactam antibiotic by enzymatic acylation of a 'beta'-lactam core by means of an acylation agent, with the molar ratio between the 'beta'-lactam core and the acylation age...  
WO/1996/023796A1
Process for the recovery of cephalexin from a mixture containing cephalexin and 7-aminodesacetoxy cephalosporanic acid (7-ADCA), wherein a mixture of cephalexin and 7-ADCA, with a pH higher than 7, which apart from any solid cephalexin b...  
WO/1996/023797A1
Process for the recovery of a 'beta'-lactam antibiotic from a mixture containing the ammonium salt of the 'beta'-lactam antibiotic and the ammonium salt of the corresponding 'beta'-lactam core by subjecting the mixture to a physical trea...  
WO/1996/022296A1
A back extraction process in which beta-lactam antibiotics or clavulanic acid is extracted from an organic solvent phase into an aqeous medium phase, using a mixing region in which the phases are mixed rapidly under high turbulence and s...  
WO/1996/020198A1
A process for the production of cefotaxime in acetone/water and its use in the production of a sodium salt of cefotaxime and a crystalline sodium salt of cefotaxime in form of rounded agglomerates and in form of needles.  
WO/1996/018609A1
The present invention is a method of protecting a sulfonic acid functional group in an organic molecule as a substituted or unsubstituted neopentyl sulfonate ester. The method allows the conversion of R-SO3-H to R'-SO3-H, wherein R and R...  
WO/1996/017846A1
A process is described for preparing 3-exomethylene cephalosporanic acid derivatives for use in the synthesis of cephalosporin antibiotics such as ceftibuten. The process comprises electrochemical reduction of a compound of formula (IV),...  
WO/1996/017850A1
This invention relates to a new use of a cephem compound of formula (I), wherein R1 is aryl(lower)alkyl which may have one or more suitable substituent(s), arylthio(lower)alkyl, lower alkenylthio(lower)alkyl which may have one or more su...  
WO/1996/017847A1
A process for the preparation of cephalosporin compounds of formula (I) is disclosed, wherein R1 is hydrogen, methoxy or formamido; R2 is an acyl group, in particular that of an antibacterially active cephalosporin; R3 is a pharmaceutica...  
WO/1996/017849A1
Derivatives of 7-alkylidene cephalosporanic acid sulfone and the pharmaceutically active salts thereof are found to be potent inhibitors of 'beta'-lactamase enzymes.  
WO/1996/017848A1
Cephalosporins with an exocyclic allene in the 7-position and their pharmaceutically active salts are potent inhibitors of 'beta'-lactamases and are therefore useful in the treatment of penicillin resistant infections.  
WO/1996/016067A1
A process for the silylation of 6-aminopenicillanic acid or 7-amino-desacetoxy-cephalosporanic acid by silylation in certain carboxylic acid esters and its use in the production of 6-alpha-aminoacyl-penicillins and 7-alpha-aminoacyl-desa...  
WO/1996/012712A1
The present invention relates to a novel reactive phosphate derivative of thiazolylacetic acid having general formula (II), which is useful as an intermediate for preparing cephalosporin derivatives: in which R represents hydrogen, C1-C4...  
WO/1996/007659A1
A novel crystal of 7'beta'-[2-(2-aminothiazol-4-yl)-2-Z-(hydroxyimino)acetamido ]-3-[(pyrazol-4-yl)-methylthio]-3-cephem-4-carboxylic acid or a salt thereof. The compound is a cephalosporin antibiotic having a potent antibacterial activi...  
WO/1996/005205A1
A cephalosporin derivative represented by general formula (I) wherein an (un)substituted 3-(imidazo[5,1-b]thiazolium-6-yl)-1-propenyl group is present as a substituent at the 3-position of the cephem ring, having an excellent antibacteri...  
WO/1996/004286A1
The present invention provides processes for making compounds of the structure (Q-L1)-L-(L2-B), wherein (I) Q is a quinolone moiety; (II) B is a lactam moiety; and (III) L, L1, and L2 together comprise a linking moiety; comprising the st...  
WO/1996/004247A1
The present invention provides a process for making a compound having a structure according to formula (I) wherein A1, A2 and A3 are independently carbon or nitrogen and R1, R3, R4 and R6 are known quinolone substituents; and wherein one...  
WO/1996/003373A1
Esters of 2-(2-azetidinon-N-yl)-2- and 3-butenoic acids of formula (I), wherein X is an acylamino group, Y is a S-substituted dithio group or a sulfonylthio group, or X and Y are joined to form a group (a), wherein R1 is the aliphatic, a...  
WO1995035020A3  
WO/1996/002548A1
Cephalosporin compounds of formula (I) are disclosed. The compounds are useful against MRSA/MRCNS. Compositions and methods of use are also included.  
WO/1995/035020A2
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 a...  
WO/1995/034567A1
New 9,12-epoxycyclohexano[3,4-c]cephalosporins of formula (I) are prepared starting from the corresponding ester obtained reacting a 7-phenylacetamido-3-cephem-4-carboxylic acid having in position 3 a leaving group, with furan, optionall...  
WO/1995/033753A1
The invention relates to a process for the preparation of trihydrated cefixime by reacting a functional derivative of N-protected (Z)-2-(2-aminothiazol-4-yl)-2-(tert-butoxycarbonylmethoxyimi no)acetic acid with 7-amino-3-vinyl-3-cepheme-...  
WO/1995/032210A1
Novel cephalosporin compounds of formula (I) exhibit potent and broad antibiotic activities against Gram-negative and Gram-positive bacteria and various resistant bacteria.  
WO/1995/029182A1
Intermediates in the production of cephalosporins of formula (IA) wherein either 'alpha') Ra denotes hydrogen or a silyl group; Rb denotes a group of formula -ORe, wherein Re denotes hydrogen or alkyl; and Rc and Rd together denote a bon...  
WO/1995/026966A1
The present invention includes novel (7R)-7-(acylamino)-3-(arylthio)-3-cephem-4-carboxylic acids or their pharmacologically acceptable salts which exhibit antibiotic activity against a wide spectrum of organisms including organisms which...  
WO1995019974A3  
WO/1995/025109A1
A cephem compound represented by general formula (1), which has an excellent antibacterial effect against various pathogenic bacteria, wherein Q represents CH or N; R1 represents carboxylate, etc.; R represents group (a) or (b); R3 repre...  
WO/1995/023153A1
Derivatives of 7-aminoceph-3-em-4-carboxylic acid with 6-fluoroquinolone derivatives in which the cephem and 6-fluoroquinolone moieties are bound to each other through a carboxamido bond as well as the pharmaceutical compositions contain...  
WO/1995/019974A2
Calixarene-based compounds are described which have biological activity, particularly anti-bacterial, anti-fungal, anti-cancer and anti-viral activity. Some compounds have been found to have anti-HIV activity. The compounds are calixaren...  
WO/1995/015966A1
2-spiro(2'-spirocycloalkyl)cyclopropyl cephalosporin sulfone compounds, methods of treating patients for elastase inhibition, and processes for preparing such compounds.  
WO/1995/013281A1
A process for producing a 3-substituted cephem compound from an allenyl-'beta'-lactam compound which can readily be prepared from an inexpensive penicillin compound in a short reaction path. The process comprises reacting an allenyl-'bet...  
WO/1995/009171A1
A cephalosporin derivative as a cephem compound having an excellent antibacterial activity and being useful as a remedy for various bacterial infections. It has an (un)substituted 2-(5-thiazolyl)vinyl group at the 3-position and is repre...  
WO/1995/007912A1
A compound represented by general formula (I), i.e., a cephem derivative having an (un)substituted imidazo[5,1-b]thiazolium-6-yl group at the 3-position of the ring, wherein X represents CH or N; R1 represents H, alkyl, alkenyl, etc.; an...  
WO/1995/007283A1
New cephem compounds of formula (I), wherein R1 is amino or protected amino, R2 is hydrogen, lower alkyl or hydroxy protective group, R3 is carboxy or protected carboxy, R4 is 3-pyridyl, 4-pyridyl or optionally substituted heteromonocycl...  
WO1995002603A3  
WO/1995/004739A1
A compound of formula (I) is disclosed. R13 represents hydrogen, NH2, C1-4 alkyl, C1-4 alkylamino or di(C1-4) alkylamino-; Y represents CH or N; Y" represents (a) CRgamma'Rz' with Rgamma' and Rz' hydrogen, C1-6 alkyl, C3-8 cycloalkyl or ...  
WO/1995/004740A1
L-valylamides and L-homovalylamides of 7alpha-amino-1,1-dioxo-3-cefem of formula (I), the process for obtaining them and the pharmaceutical compositions which contain them are described. The above-mentioned compounds are active in chroni...  
WO/1995/002603A2
The present invention relates to the use of known cephem derivatives of formula (I), wherein n is zero, one or two; R1 is hydrogen or an organic radical, R2 represents halo or an organic radical or R1 and R2 taken together with the C-2 c...  
WO/1994/029321A1
The present invention relates to novel cephem compounds having formula (I) wherein Q is a carbon or nitrogen atom; X is an oxygen atom, or a nitroalkylenyl or cyanoimine group, with the proviso that X cannot be an oxygen atom when Q is a...  
WO/1994/029320A1
A cephalosporin compound represented by general formula (I) or a pharmaceutically acceptable salt thereof, a process for producing the same, and a medicinal use thereof, especially, as a preventive or remedy for infectious diseases, wher...  
WO/1994/028003A1
The present invention provides compounds of formula (I) and pharmaceutically or veterinarily salts thereof; wherein R1 is hydrogen or halogen or an organic group; R2 is hydrogen or an optionally substituted C1-C6 alkyl, C3-C6 cycloalkyl,...  
WO/1994/022874A1
A cephalosporin derivative represented by general formula (I) or a salt thereof, wherein R1 represents hydrogen, lower alkenyl, lower alkynyl, cycloalkyl, hydroxyl-protecting group, or (un)substituted lower alkyl; R2 represents hydrogen,...  
WO/1994/021649A1
A new salt form of cefonicid and its method of preparation is disclosed.  
WO/1994/020504A1
The present invention provides cephalosporin sulphones of formula (I) and the pharmaceutically and veterinarily acceptable salts thereof, wherein n is one or two; A and B are both or each independently hydrogen or an organic radical; R1 ...  
WO/1994/020505A1
Anhydrous and crystalline free acid form of the cephalosporin antiobiotic ceftiofur, processes for its manufacture, and pharmaceutical compositions containing it are provided.  
WO/1994/018209A1
Provided is a process for isolating cefaclor from an acylation reaction mixture by adding anthraquinone-1,5-disulfonic acid to the mixture. The acid highly selectively precipitates with cefaclor so that isolation and recovery is streamli...  
WO/1994/014818A1
This invention relates to a compound of formula (I) and its pharmaceutically acceptable salt, to processes for preparation thereof, to pharmaceutical composition comprising the same, and to a method for preventing and/or treating infecti...  
WO/1994/012504A1
A method of obtaining high-purity 7-aminocephalosporanic acid from an aqueous solution thereof contaminated with alpha-aminoadipic acid, which comprises treating the aqueous solution with a strongly basic styrene-base anion-exchange resi...  

Matches 501 - 550 out of 6,498