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)
05/1992
05/20/1992EP0486461A1 A diketene imine derivative and process for preparing same
05/13/1992EP0485218A2 Process for preparing (1'R,3S)-3-(1'-hydroxy-ethyl)-azetidin-2-one and derivatives thereof
05/12/1992US5112966 Beta-lactams
05/10/1992WO1992004342A1 A novel quinolone carboxylic acid derivative
05/10/1992CA2055165A1 Diketene imine derivative and process for preparing same
05/06/1992EP0483667A2 Cyclic imino derivatives, process for their preparation and drugs containing them
05/06/1992EP0278977B1 Prodrug derivatives of carboxylic acid drugs
05/05/1992US5110812 Azetidin-2-one derivatives as serine protease inhibitors
05/05/1992CA1300015C Compositions comprising 1-substituted azacycloalkanes
04/1992
04/29/1992EP0482084A1 (1,2n) and (3,2n)-carbocyclic-2-amino tetralin derivatives.
04/22/1992EP0481671A1 New substituted azetidinones as anti-inflammatory and antidegenerative agents
04/22/1992CN1060469A Process for preparing cephalosporins derivants
04/21/1992US5106878 Use of substituted aminoalkoxybenzene derivatives in the control or prevention of fungal infections
04/21/1992US5106475 Alkylating, deprotecting, electrolytic reduction; intermediate for beta-lactam antibiotics
04/21/1992CA1299172C Synthesis of azetidinones
04/16/1992CA2052973A1 Substituted azetidinones as anti-inflammatory and antidegenerative agents
04/14/1992US5104984 Enantioselective process for producing 1-beta-methyl carbapenem antibiotic intermediates
04/14/1992US5104862 Bethalactam elastase inhibitors containing phosphorous acid derivatives at the 4-position of the 2-azetidinone
04/08/1992EP0479431A1 Intermediates to 1-carbacephalosporins and process for preparation thereof
04/08/1992EP0478874A2 Novel 2-substituted alkyl-3-carboxy carbapenems as antibiotics and a method of producing them
04/01/1992EP0478328A1 Novel fibrinogen receptor antagonists
03/1992
03/31/1992US5100880 Treatment of rheumatoid arthritis and emphysema, enzyme inhibitors
03/28/1992CA2052069A1 Fibrinogen receptor antagonists
03/25/1992CN1059719A Substituted guanidine derivatives their preparation and use
03/17/1992US5096899 Oxapenem-3-carboxylic acids
03/11/1992EP0474038A1 New 2-tert. substituted methyloxapenem-3-carboxylic acids and esters, their preparation and use
03/10/1992US5095014 3-(2-chloro-4-(trifluoromethyl)phenoxy)-1-azetidine carboxamides having anticonvulsant activity
03/05/1992CA2050424A1 2-tert-substituted methyloxapenem-3-carboxylic acids and esters, a process for their preparation and their use
02/1992
02/26/1992EP0472449A2 Substituted sulfonamides, processes for their preparation and medicines containing them
02/25/1992CA1296343C [(2,2,2-trichloroethoxy)methoxy)]amine
02/19/1992EP0471372A1 Novel substituted guanidine derivatives, their preparation and use
02/18/1992US5089609 4-benzoyl azetidinones
02/18/1992CA2049251A1 Substituted guanidine derivatives, their preparation and use
02/12/1992EP0470711A1 Fungicides
02/06/1992WO1992001696A1 Cephalosporins and homologues, preparations and pharmaceutical compositions
02/06/1992WO1992001695A1 Cephalosporins and homologues, preparations and pharmaceutical compositions
02/05/1992EP0469374A2 Oxalic acid derivatives, their preparation and agents containing them for the regulation of plant-growth
01/1992
01/31/1992CA2047656A1 Oxalic acid derivatives, their preparation and plant growth regulators containing them
01/15/1992EP0466509A1 Heterocyclic derivatives
01/14/1992US5081239 Ruthenium catalyzed process for preparing 4-acetoxyazetidinones
01/14/1992US5081238 Reducing the methylene group of a 2-oxo-3-(1-hydroxyethyl)-4-(1-alkyloxycarbonylethen-1-yl)azetidine using l-SELECTRIDE and sec-butanol
01/14/1992CA1294274C Method of treating muscle tension, muscle spasticity and anxiety with 3-aryloxy-azetidinecarboxamides
01/01/1992CN1015262B Process for preparation of beta-lactam antibiotics
01/01/1992CN1015261B Process for preparation of carbapenem antibiotic
12/1991
12/27/1991EP0462667A2 Beta-lactams as antihypercholesterolemics
12/25/1991CN1015178B Process and intermediates for beta-lactam antibiotics
12/24/1991US5075439 Processes for (3S,4R)-3-[1(R)-t-butyl-dimethylsilyloxy)-ethyl]-4-[1-oxo-3-thiolanylthio(thiocarbonyl)thio]azetidin-2-ones and intermediates therefor
12/24/1991US5075438 Synthesis of azetidinones
12/24/1991US5075437 Enolizing a 3,4-disubsituteed-2-azetidine
12/24/1991US5075436 Chiral 1-β-methyl-carbapenem intermediates
12/24/1991US5075435 Beta-lactams and their production via stereospecific hydrogenation
12/21/1991CA2044906A1 Beta-lactams as antihypercholesterolemics
12/18/1991CN1057049A Method for preparation of taxol
12/17/1991US5073646 Chemical intermediates, microbiocides
12/17/1991US5073641 Prodrug derivatives of carboxylic acid drugs
12/15/1991CA2043704A1 Compounds
12/11/1991EP0460881A1 Process for bicyclic beta-lactams
12/11/1991CN1056878A Novel 2-substituted alkyl-3-carboxy carbapenems as antibiotics and method of producing them
12/10/1991US5071584 Storage stable, heat resistant
12/07/1991CA2043939A1 Process for bicyclic .beta.-lactams
12/03/1991US5070195 Intermediates for conversion of penicillins to cephalosporins
11/1991
11/27/1991CN1014894B Process for preparing 4,4-dialkyl-2-azetidinones
11/26/1991US5068232 Novel 2-substituted alkyl-3-carboxy carbapenems as antibiotics and a method of producing them
11/26/1991US5068231 Method of treating muscular tension, muscle spasticity and anxiety with 3-aryloxy and 3-arylthioazetidinecarboxamides
11/26/1991CA1292474C Anti-spasmodic agents having a ring in the main chain
11/21/1991EP0457512A2 New amino protecting group
11/15/1991CA2041897A1 Amino protecting group
11/13/1991EP0456183A2 Spiro dibenzosuberane derivatives
11/12/1991US5064761 Process for the manufacture of 4-acylamino-3-hydroxybutyric acid esters
11/12/1991US5064447 Process for recovering organic vapors from air
11/12/1991CA1292004C .beta.-N-SUBSTITUTED AMINOTHIOL ESTER AND PROCESS FOR PREPARING THE SAME
11/08/1991CA2040750A1 Spiro dibenzosuberane derivatives
10/1991
10/30/1991CN1055736A Process for preparing 4,4-dialkyl-2-azetidinones
10/29/1991US5061817 Enolsilyl ether compound
10/29/1991US5061712 Bactericides
10/23/1991EP0452782A1 Novel intermediates for preparing guanidine derivatives, their preparation and use
10/14/1991CA2040385A1 Intermediates for preparing guanidine derivatives, their production and use
10/11/1991CA2039968A1 2-substituted alkyl-3-carboxy carbapenems as antibiotics and a method of producing them
10/09/1991EP0253837B1 Catalytic method for producing fluoroaromatic compounds using branched alkyl pyridinium salts
10/08/1991US5055573 Process for preparing 1-carba-2-penem-3-carboxylic acid
10/06/1991WO1991015491A1 Heterocyclic compounds as aldose reductase inhibitors
10/06/1991CA2078210A1 Heterocyclic compounds as aldose reductase inhibitors
10/03/1991WO1991014691A1 Process for preparing penem esters
10/03/1991WO1991012243A3 Copolymerizable imidazolidinone monomer
10/02/1991CN1054983A Process for preparing penem esters
10/01/1991US5053502 Bactericide intermediates
10/01/1991US5053501 Preparation of 3-exomethylenecepham sulfoxides and 2-chlorosulfinylazetidinones using molecular sieves
10/01/1991US5053392 Anticoagulants
10/01/1991CA1289956C Naphthyridine- and quinolonecarboxylic acids as antibacterial agents
09/1991
09/30/1991WO1991014672A1 Chiral catalysts for enantioselective synthesis
09/25/1991EP0447456A1 Intermediate compounds for preparing penems and carbapenems
09/25/1991EP0434743A4 Methods for preparing captopril and its analogues
09/24/1991US5051502 Rhodium catalyzed cyclization process for bicyclic β-lactams
09/17/1991CA1289141C Process for the production of high energy material
09/11/1991EP0445731A1 Azabicyclo and azacyclo oxime and amine cholinergic agents and pharmaceutically acceptable salts thereof
09/04/1991EP0444708A2 Process for preparation of beta-lactam derivatives
08/1991
08/28/1991CN1054071A Orally active renin inhibitors
08/28/1991CN1013675B Process for the manufacture of aminothiazole acid derivatives
08/28/1991CN1013646B Method for vapor-phase intermolecular dehydration of alkanolamines
08/27/1991US5043440 Oxidation process for preparing 4-acyloxy azetidinones in a two-phase system
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