Patents
Sitemap › C07 - Organic chemistry › C07D - Heterocyclic compounds › C07D 501 - Heterocyclic compounds containing 5-thia-1-azabicyclo [4.2.0] octane ring systems, i.e. compounds containing a ring system of the formula: , e.g. cephalosporins; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
Patents for C07D 501 - Heterocyclic compounds containing 5-thia-1-azabicyclo [4.2.0] octane ring systems, i.e. compounds containing a ring system of the formula: , e.g. cephalosporins; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring (7,574)
11/1991
11/12/1991US5064824 Cephalosporin compounds
11/12/1991US5064649 Cephalosporin derivatives
11/05/1991US5063224 R-cefuroxime axetil
10/1991
10/31/1991WO1991016327A1 Antimicrobial quinolonyl lactams
10/31/1991WO1991016310A1 Antimicrobial quinolone thioureas
10/31/1991CA2078444A1 Antimicrobial quinolonyl lactams
10/31/1991CA2077435A1 Novel antimicrobial quinolone thioureas
10/30/1991EP0453952A2 A process for synthesizing cephalosporin compounds
10/30/1991EP0453924A1 A process for synthesizing cephalosporin compounds
10/30/1991EP0453574A1 Cephalosporin derivative
10/30/1991CN1014528B Process for producing compounds of the kind of cephalosporin
10/29/1991US5061794 Cephalosporin derivatives, and antibacterial agents
10/29/1991US5061702 Cephem compound as an antimicrobial agent
10/23/1991EP0452987A1 Isoindoline derivatives
10/22/1991CA1291118C Process for preparing cephalosporin compounds
10/22/1991CA1291038C Method for preventing coloration of aqueous preparations of cefmenoxime
10/15/1991US5057511 Antibiotics, bactericides
10/15/1991CA1290748C 3-propenylcephem derivative
10/09/1991EP0449871A1 Method for predicting biological activity of antibiotics, and novel non beta-lactam antibacterial agents derived therefrom
10/08/1991US5055572 Antiobiotics
10/08/1991US5055462 Cephalosporin compounds
10/03/1991WO1991014692A1 Cephalosporins, process for their preparation and pharmaceutical compositions containing them
10/02/1991EP0449515A2 Novel cephalosporin intermediates and process for preparing the intermediates and their end products
10/02/1991CN1054984A Process for preparation of 7-amino-3-methoxymethyl-ceph-3-em-4-carboxylic acid
10/01/1991US5053501 Preparation of 3-exomethylenecepham sulfoxides and 2-chlorosulfinylazetidinones using molecular sieves
10/01/1991US5053500 Intermediates for the preparation of beta-lactam antibiotics
09/1991
09/24/1991CA1289555C Cephem compounds
09/18/1991EP0447118A2 3-tetrazolylthiomethyl cephalosporin antibiotics
09/17/1991US5049665 Cephalosporin derivatives
09/17/1991US5049558 Quaternized nitrogen-heterocycle substituted
09/17/1991CA2038411A1 3-tetrazolylthiomethyl cephalosporin antibiotics
09/11/1991EP0445821A1 Process for preparing a 3-formylcephem derivative
09/10/1991CA1288764C Cephalosporin compounds
09/09/1991CA2037688A1 Organo cuprate process for cefprozil
09/04/1991EP0444599A2 Novel cephem compound
08/1991
08/28/1991EP0185679B1 Intermediary products of cephalosporine, preparation process thereof and utilization thereof
08/28/1991CN1013675B Process for the manufacture of aminothiazole acid derivatives
08/28/1991CA2037127A1 Cephem compound
08/27/1991US5043439 Process for production of cephalosporins
08/27/1991US5043334 Cephalosporin antibiotics
08/21/1991EP0442385A2 Process for de preparation of 7-amino-3-methoxymethyl-ceph-3-em-4-carboxylic acid
08/21/1991EP0117872B1 Process for preparing cephalosporin compounds
08/14/1991DE4004370A1 7-amino-3-methoxymethyl-3-cephem-4-carboxylic acid - useful starting material for pharmaceuticals, is from 7-amino:cephalosporanic acid, methanol and sulphonic acid
08/14/1991CN1013474B Process for preparing 7-d mandeloyl-amine-3(1-sulfomethyl tetra-nitriolazole-5) sulfomethyl-3-cephalosporin-4-mono sodium carboxylate and its use
08/14/1991CA2036208A1 Process for the preparation of 7-amino-3-methoxymethylceph-3-em-4-carboxylic acid
08/06/1991US5037988 Aminothiazolyl-oximinoacetic acid derivatives; antibiotics
08/06/1991US5037975 Cephalosporin free radical compounds
08/06/1991CA1287347C Process for the preparation of cefodizime
07/1991
07/31/1991EP0439097A2 Cephalosporin derivative
07/31/1991EP0439096A2 Improvements in or relating to beta lactam production
07/30/1991US5036066 Tricyclic pyridine derivatives
07/30/1991US5036064 Cephalosporins with sulfur-containing oxyimino side chain
07/24/1991CN1013274B Prepn. of cephalosporin derivatives
07/23/1991US5034522 Method for the production of 3-methyl cephem derivatives
07/23/1991US5034521 Deesterification and etherification of cephalosporins
07/10/1991CN1052863A Cephalosporin derivatives, process for preparing same, antimicrobial composition containing derivatives
07/03/1991EP0435333A2 Cephalosporin derivatives, the process for preparing the same, and antimicrobial composition containing the derivatives
07/02/1991US5028601 Cephalosporin compounds and antibacterial agents
07/02/1991US5028427 Antibiotic
07/02/1991CA1285554C Method for preparing crystalline cefadroxil monohydrate
06/1991
06/27/1991WO1991009038A1 Cephalosporins, processes for their preparation, intermediates and pharmaceutical compositions containing them
06/27/1991WO1991009037A1 Process for producing 3-substituted thio-3-cephem compound
06/25/1991US5026843 Reacting the 7-amino derivative with 2-((2-(aminothiazol-4-yl) ,1-methoxyiminoacetylthio)benzothiazole in the presence of water, solvent and amine; amine salt formation followed by formation of the disodium hydrate
06/25/1991US5026842 Reacting 7-aminocephalosporanic acid with a carboxylic acid in the presence of a dehydration condensation agent and acid
06/25/1991US5026695 7-acylamino-3-substituted cephalosporanic acid derivatives
06/19/1991EP0432297A1 A method for the preparation of the sodium salt of O-formyl cefamandole
06/19/1991CN1052309A Cephalosporin derivatives and their production and uses
06/18/1991CA1284995C Cephalosporin compounds and processes for preparing the same
06/18/1991CA1284994C Cephalosporin salts and injectable compositions
06/18/1991CA1284993C Cephalosporins and processes for their preparation
06/16/1991WO1991009036A1 Beta-lactam derivatives
06/16/1991CA2071885A1 Beta-lactam derivatives
06/12/1991EP0432042A2 Cephalosporin derivatives and their production and uses
06/12/1991EP0431794A2 3-Fluorosulfonyloxyceph-3-EM displacement process
06/11/1991US5023331 Of monomethyl formamide or dimethyl acetamide, antibiotic; stable
06/05/1991EP0429999A1 Novel cephalosporins, process for their preparation and their use as medicaments
06/05/1991EP0429895A1 Process for preparing monohydrate 7-(D-2-amino-2-phenylacetamido)-3-cefem-4-carboxylic acid and intermediate formed in the process
06/04/1991US5021564 Process for preparing ceftazidime pentahydrate
06/02/1991CA2028954A1 Process for preparing monohydrate 7-(d-2amino-2-phenylacetamido)-3-cefem-4-carboxylic acid and intermediate formed in the process
05/1991
05/31/1991CA2031008A1 Cephalosporins
05/30/1991WO1991007413A1 3-(bicyclic hetero ring thiomethyl)cephem derivatives
05/30/1991WO1991007410A1 Cephalosporin derivatives
05/28/1991US5019570 Cephalosporin compounds
05/22/1991CA2147460A1 3-fluorosulfonyloxyceph-3-em displacement process
05/21/1991US5017569 Cephalosporin derivatives
05/16/1991WO1991006549A1 Cephalosporin compounds and production thereof
05/15/1991EP0427248A2 New cephem compounds and processes for preparation thereof
05/15/1991CN1012614B Ceph-3-ene-4-carboxylic acid derivatives and the prepn.
05/14/1991WO1991007411A1 Cephalosporin derivative
05/14/1991US5015736 Piperazine intermediates
05/14/1991CA2045143A1 Cephalosporin derivatives
05/14/1991CA1284147C 7-(substituted) amino-3-substituted cephalosporanic acids and esters
05/11/1991CA2029638A1 Cephem compounds and processes for preparation thereof
05/07/1991US5013833 Process for preparing cefuroxime axetil
05/07/1991US5013731 Bactericides
05/07/1991US5013730 Antibiotics
05/07/1991CA1283905C Cephalosporin derivatives, processes for their preparation and antibacterial agents
05/02/1991WO1991005789A1 3-[(1-substituted pyridinium-4-yl)thiomethyl]-cephalosporin derivatives
04/1991
04/24/1991EP0423837A2 Cephalosporin intermediates and their utilisation
04/23/1991US5010188 Cephem derivatives
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