Patents
Sitemap › C07 - Organic chemistry › C07D - Heterocyclic compounds › C07D 205 - Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom
Patents for C07D 205 - Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom (6,868)
08/1991
08/21/1991EP0442576A1 Synthesis of cis-beta-lactams with the aid of an alkali metal compound
08/21/1991CN1053920A Method of resolving cis-3-amino-4-(2-(2-furyl) eth-1-yl)-1- methoxycarbonylmethyl-azet idin-2-one
08/15/1991WO1991012243A2 Copolymerizable imidazolidinone monomer
08/15/1991CA2074098A1 Copolymerizable imidazolidinone monomer
08/14/1991EP0441543A1 Method of resolving cis 3-amino-4-[2-(2-furyl)eth-1-yl]-1-methoxycarbonylmethyl-azetidin-2-one
08/14/1991EP0344197B1 Novel n-1 substituted beta-lactams as antibiotics
08/14/1991CA2036152A1 Synthesis of cis-beta-lactams with the aid of an alkali metal compound
08/13/1991US5039672 Administering enzyme inhibitors to control diabetes
08/07/1991CA2035550A1 Method of resolving cis 3-amino-4-[2-(2-furyl)eth-1-yl]-1-methoxycarbonylmethyl-aze idin-2-one
08/06/1991US5037975 Cephalosporin free radical compounds
08/06/1991US5037974 From beta-amino diacid methanesulfonyl chloride and sodium bicarbonate
08/06/1991US5037819 Anticoagulant; treating pancreatitis
07/1991
07/30/1991US5036066 Tricyclic pyridine derivatives
07/24/1991EP0438233A2 Orally active renin inhibitors
07/23/1991CA1286661C 2,6-disubstituted penem compounds
07/19/1991CA2034315A1 Orally active renin inhibitors
07/17/1991EP0436722A1 Polysaccharide derivatives and separating agent
07/17/1991EP0436612A1 Amino acid transport proteins, amino acid analogues, assay apparatus, uses thereof for treatment and diagnosis of cancer
07/16/1991US5032614 Vasodilator
07/16/1991CA1286304C Substituted azetidinones as anti-inflammatory and antidegenerative agents
07/10/1991EP0436484A2 Safening mixtures of sulfonylurea and acetanilide herbicides
07/10/1991EP0436483A2 Safening imidazolinone herbicides
07/10/1991CN1052769A Safening mixtures of sulfonylurea and acetanilide herbicides
07/10/1991CN1052768A Softening imidazolinone herbicides
07/10/1991CN1013110B Preparation of 1-substituted azetidine-3-01 derivatives
07/09/1991US5030725 Method of resolving cis 3-amino-4-[2-(2-furyl)eth-1-yl]-1-methoxycarbonylmethyl-azetidin-2-one using (-)-DAG
07/09/1991US5030628 N-aryl-azetidinones, their preparation process and their use as elastase inhibitors
07/03/1991EP0434743A1 Methods for preparing captopril and its analogues
07/02/1991CA1285563C Ureidoalkanoylaminocarbonyl amino and imino acids and esters
06/1991
06/30/1991CA2033043A1 Safening mixtures of sulfonylurea and acetanilide herbicides
06/26/1991EP0433759A1 4-Substituted alkyl carbapenem antibiotics
06/25/1991US5026844 Process for the preparation of 4-acyloxy-2-azetidinone derivatives
06/25/1991US5026625 Titanocenes, the use thereof, and n-substituted fluoroanilines
06/19/1991EP0433001A1 Insecticidal compounds
06/19/1991EP0432204A1 Derivatives and precursors of captopril and its analogues
06/12/1991EP0431838A1 Nonionic radiographic contrast agents
06/12/1991CN1052114A Nonionic radiographic contrast agents
06/05/1991EP0430190A2 New tricyclic compounds
06/05/1991CA2031487A1 4-substituted alkyl carbapenem antibiotics
06/02/1991WO1991007976A1 Anti-thrombotic peptides and pseudopeptides
06/02/1991CA2069754A1 Anti-thrombotic peptides and pseudopeptides
05/1991
05/30/1991CA2029830A1 Nonionic radiographic contrast agents
05/24/1991WO1991008195A1 N-(1-(2-carboxyethyl)cycloalkyl carbonyl)-beta-alanine derivatives for pharmaceutical use
05/24/1991CA2067223A1 Therapeutic agents
05/08/1991CA2027845A1 Process for producing cyclobutane derivative
05/07/1991US5013729 Systemic Bactericides
05/07/1991CA1283924C (3s)-3-amino-2-oxo-4,4-dimethyl-1-azetidinylsulfate
05/07/1991CA1283906C .beta.-LACTAM COMPOUNDS AND PRODUCTION THEREOF
05/02/1991EP0425378A1 1,3,4-Trisubstituted azetidin-2-one derivatives, useful intermediates for synthesis of beta-lactames, and their process of asymmetrical preparation
04/1991
04/26/1991CA2028458A1 Azetidin-2-one, 1,3,4-trisubstituted derivatives, useful intermediates for the beta-lactam synthesis, and asymetric synthesis process thereof
04/10/1991EP0421440A2 Process for producing azetidinone derivatives
04/10/1991EP0421283A2 A new process for preparing optically active 3-substituted azetidinones
04/10/1991EP0421219A2 Process for the preparation of 7-amino-3-[(Z)-1-propenyl-1-yl]-3-cephem-4-carboxylic acid
04/04/1991CA2026597A1 Process for the preparation of 7-amino-3-[ (z)-1-propen-1-yl] -3-cephem-4-carboxylic acid
04/02/1991CA1282415C Azetidin-2-on derivatives and process for production thereof
03/1991
03/27/1991EP0419215A2 Process for preparing 4-substituted azetidinones
03/27/1991EP0418674A1 Pharmaceutical preparations for enhanced absorption of antibacterial compounds
03/26/1991CA1282066C Process for azetidinones
03/21/1991WO1991000856A3 (1,2n) and (3,2n)-carbocyclic-2-amino tetralin derivatives
03/21/1991CA2025517A1 Process for preparing 4-substituted azetidinones
03/19/1991US5001235 Antibiotic beta-lactams containing a pyridone carboxylic acid or acid derivative
03/13/1991EP0416953A2 10-(1-Hydroxyethyl)-11-oxo-1-azatricyclo[7.2.0.0.3,8]undec-2-ene-2-carboxylic acid derivatives
03/13/1991EP0416952A2 4-(1'-Oxocyclohex-2'-yl)azetidin-2-one derivatives
03/13/1991EP0416393A1 Peptidyl difluorodiol renin inhibitors
03/12/1991US4999381 Fungicides
03/12/1991CA2024887A1 Pharmaceutical preparations
03/06/1991EP0415487A2 Beta-lactams as anticholesterolemic agents
03/06/1991CA2024698A1 Peptidyl diflurodiol renin inhibitors
03/05/1991US4997936 Antibiotics
03/01/1991CA2024267A1 Beta-lactams as anticholesterolemic agents
02/1991
02/27/1991EP0413762A1 Peptide analogs and their use as haptens to elicit catalytic antibodies
02/26/1991US4996314 6-(disubstituted amino)carbapenem compounds
02/26/1991US4996201 Alzheimer's disease
02/21/1991WO1991002006A1 Polysaccharide derivatives and separating agent
02/19/1991US4994568 6- and 4-substituted-1-azabicyclo(3.2.0)heptan-3, 7-dione-2-carboxylates
02/19/1991CA1280408C .beta.-LACTAM ANTIBIOTICS, PROCESSES FOR THEIR PREPARATION AND THEIR USE AS MEDICAMENTS
02/12/1991US4992545 Process for preparing 4-substituted azetidinones
02/12/1991US4992544 Monocyclic beta-lactams and process for the preparation thereof
02/12/1991US4992543 Penem derivatives
02/06/1991EP0411616A1 4-(N-substituted amino)-2-butynyl-1-carbamates and thiocarbamates and derivatives thereof as centrally acting muscarinic agents
02/06/1991EP0411541A2 Process for preparing monobactames and their intermediate product
02/05/1991US4990504 Azetidine derivatives to treat memory and learning disorders
02/03/1991CA2022511A1 4-(n-substituted amino)-2-butynyl-1-carbamates and thiocarbamates and derivatives thereof as centrally acting muscarinic agents
02/03/1991CA2022507A1 Process for preparing monobactames and their intermediate product
01/1991
01/30/1991EP0410359A1 Substituted aminoalkoxy-benzene-derivatives
01/30/1991EP0410260A2 Peptidyl aminodiol renin inhibitors
01/29/1991CA1279652C 1-beta-methylcarbapenem antibiotic intermediates
01/29/1991CA1279649C2 Enantioselective process for producing 1-beta-methylcarbapenem antibiotic intermediates
01/29/1991CA1279640C Process for the preparation of penems
01/28/1991CA2020888A1 Substituted aminoalkoxybenzene derivatives
01/27/1991CA2021740A1 Peptidyl aminodiol renin inhibitors
01/23/1991EP0409081A1 Beta-Lactam Derivatives
01/22/1991CA1279322C2 Process for preparing 4,4-dialkyl-2-azetidinones
01/14/1991WO1991000856A2 (1,2n) and (3,2n)-carbocyclic-2-amino tetralin derivatives
01/08/1991US4983732 Cehmical intermediates for beta-lactam antibiotics
01/08/1991US4983597 N-sulfonyl-2-azetidinone derivatives
01/02/1991EP0406112A1 1-Benzhydrylazetidines, their preparation and their use as intermediates for the preparation of compounds with antimicrobial activity
01/02/1991CN1048215A Improved synthesis of beta-lactams using metal compound
01/02/1991CA1278568C Salts of amino-beta-lactamic acids and process for the preparation thereof
01/01/1991US4981992 Hydrogenation, ruthenium complex catalyst
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