Patents
Sitemap › C07 - Organic chemistry › C07D - Heterocyclic compounds › C07D 257 - Heterocyclic compounds containing rings having four nitrogen atoms as the only ring hetero atoms
Patents for C07D 257 - Heterocyclic compounds containing rings having four nitrogen atoms as the only ring hetero atoms (9,612)
03/1982
03/30/1982CA1120924A1 7-.alpha.-OXYIMINOACYLCEPHALOSPORINS
03/24/1982EP0048169A2 Bis-tetrazoylmethyl substituted cephalosporin antibiotics, their preparation and pharmaceutical formulations containing them
03/24/1982EP0048168A2 7-Acylamino cephalosporin compounds, their preparation and pharmaceutical formulations containing them
03/24/1982EP0048167A2 Bis-tetrazolemethyl thiols and their preparation
03/24/1982EP0048166A1 Bicyclic 1-oxa-beta-lactam compounds, their preparation and pharmaceutical formulations containing them
03/24/1982EP0048165A1 Bis-tetrazolemethyl substituted beta-lactam antibiotics, their preparation and pharmaceutical formulations containing them
03/23/1982US4321203 19-Hydroxy-7a-homo-PGI1 compounds
03/17/1982EP0047661A1 Additives, feed compositions and methods for improving ruminant feed utilization
03/17/1982EP0047491A2 New cephem compounds and processes for preparation thereof
03/10/1982EP0047014A2 Novel thioesters and process for the preparation of the same
03/02/1982US4317920 Antirheumatic agents, antiinflammatory agents
02/1982
02/16/1982US4316037 Chemical intermediates
02/16/1982CA1118427A1 Tetrazole derivatives and processes for their preparation
02/03/1982EP0045129A2 Masked antifoggant compounds for silver photographic systems
02/02/1982CA1117540A1 Process for preparing 4-oxo-benzopyran derivates
01/1982
01/26/1982US4312997 Anti-asthmatic prostaglandins
01/26/1982US4312984 Anti-asthmatic prostaglandins
01/26/1982US4312983 2-Decarboxy-2-tetrazolyl-19-hydroxy-19-methyl-6a-carba-PGI1 compounds
01/26/1982US4312982 Bactericides
01/26/1982US4312664 Compositions and methods for improving the tolerance by crop plants of herbicidally active acetanilides
01/20/1982EP0044170A1 Beta-lactam antibiotics, their preparation and use
01/19/1982US4311835 2-Decarboxy-2-tetrazolyl-19-hydroxy-6a-carba-PGI1 compounds
01/19/1982US4311834 Antihistamines, prostaglantins
01/19/1982CA1116607A1 PROCESS FOR THE PREPARATION OF N-SUBSTITUTED .alpha.-HALOGENOACETANILIDES
01/13/1982EP0043713A1 Antibacterial cephalosporins
01/05/1982US4309553 Hypolipidemic, antiatherosclerotic
01/05/1982US4309446 5-(Dihydroxyphenoxy)tetrazoles and use as sweeteners for medical compositions
01/05/1982US4309433 Pyridinecarbonamido-oxy or thio loweralkyl-1-(diloweralkylaminoloweralkyl)benzene and derivatives thereof, compositions containing same and method of using same
01/05/1982US4309305 In vitro removal of actinide (IV) ions
12/1981
12/29/1981US4308267 7-[2-Alkoxyimino-2-(amino-thiazole)acetamido]-3-[1-(sulfaminoalkly)tetrazolthiomethyl]cephalosporins
12/29/1981CA1115267A1 7-(2-alkyloxyimino-2-furylacetamido)-3-(1- carboxyalkyltetrazolyl-5-thiomethyl)-3-cephem-4- carboxylic acid)
12/23/1981EP0042154A1 New cephem compounds and processes for preparation thereof
12/22/1981US4307230 3-Vinyl-cephalosporins
12/22/1981US4307175 Photographic silver halide emulsion material containing an antifoggant precursor
12/22/1981US4307112 9-Deoxy-9A-methylene isosteres of PGI2 and process for their preparation
12/22/1981CA1114824A1 N-dichloroacetyl-1,2,3,4-tetrahydro-quinaldine, a process for its preparation and its use for preventing damage to crop plants by herbicides
12/08/1981US4304774 Bis-tetrazolmethyl substituted β-lactam antibiotics
12/08/1981CA1113933A1 Phenyltetrazolyloxy propanolamines
12/01/1981US4303539 Oil additives containing a thiocarbamyl moiety
11/1981
11/18/1981EP0039892A1 Substituted phenyl ethers
11/17/1981US4301282 1-Oxa-β-lactam antibiotics
11/17/1981US4301079 Antiasthmatic
11/17/1981CA1112647A1 .alpha.-AZOLYL SULFIDES AND THEIR DERIVATIVES
11/03/1981CA1111843A1 Aromatic nitro compounds
10/1981
10/27/1981US4297504 19-Hydroxy-6a-carba-PGI2 compounds
10/27/1981US4297489 7-α-Amino-substituted acylamino-3-(1-carboxymethyltetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acids
10/21/1981EP0038092A1 Photographic material suited for use in diffusion transfer photography
10/20/1981US4296041 19-Hydroxy-7a-homo-PGI2 compounds
10/13/1981US4294585 Ethanol or methanol and a corrosion inhibitor, an amino-tetrazole compound
10/06/1981US4293558 Antiviral thiazolinyl benzimidazoles and derivatives
10/06/1981US4293555 6- and 6,6-Disubstituted-2-substituted-oxapen-2-em-3-carboxylic acids
09/1981
09/30/1981EP0036673A1 New thiadiazol compounds and processes for their preparation
09/29/1981US4292320 Smooth muscle relaxants
09/29/1981CA1109873A1 O-2-isocephem antibacterial agents and processes and intermediates for their production
09/29/1981CA1109795A1 Compositions comprising a cephalosporin and a carbonic acid salt
09/15/1981US4289904 19-Hydroxy-6a-carba-PGI2 sulfonylamides
09/15/1981US4289847 Method of forming dye image
09/09/1981EP0035228A1 Tetrazole derivatives, process for the preparation thereof, and anti-ulcer composition containing the same
09/09/1981EP0035046A1 Novel tetrazole derivatives, process for the preparation thereof, and anti-ulcer composition containing the same
09/08/1981US4288371 19-Hydroxy-19-methyl-6,7-didehydro-PGI1 compounds
09/08/1981CA1108602A1 Cephalosporin compounds
09/02/1981EP0034925A1 5-(Dihydroxyphenoxy) tetrazoles as sweeteners
09/01/1981CA1108151A1 3-(1h-tetrazol-5-yl) chromones
09/01/1981CA1108136A1 Antibacterial agents
08/1981
08/25/1981US4286089 7-Acyl-3-(substituted tetrazolyl thiomethyl)cephalosporins
08/25/1981US4286054 Light sensitive, color photographic silver halide compositions with DIR-couplers
08/25/1981US4285869 19-Hydroxy-6-hydroxy-7a-homo-PGI1 compounds
08/25/1981US4285823 Diesel lubricant containing 5-amino tetrazoles
08/19/1981EP0033965A2 New cephem compounds and processes for preparation thereof
08/11/1981US4283575 2-Decarboxy-2-hydroxymethyl-19-hydroxy-6a-carba-PGI2 compounds
08/05/1981EP0033095A1 5-Aminotetrazole derivatives of retinoic acids, their preparation and pharmaceutical compositions containing them
07/1981
07/28/1981US4281205 2-Decarboxy-2-hydroxymethyl-19-hydroxy-6-oxo-PGF1 compounds
07/28/1981US4281150 Antiasthmatic prostaglandins
07/21/1981CA1105464A1 (4,5-dihydro-5-oxo-1h-tetrazol-1-yl)ethyl-4-¬(1-oxo- propyl)phenylamino|-4-piperidine carboxylate compounds
07/14/1981US4278671 Antibiotics, bactericides
07/08/1981EP0031708A2 Cephalosporin derivatives, processes for their manufacture, pharmaceutical compositions containing them and intermediates therefor
07/07/1981US4277613 Antiasthmatic prostaglandins
07/07/1981US4277479 Tetrazolylalkoxycarbostyril derivatives and pharmaceutical compositions containing them
06/1981
06/24/1981EP0030630A2 7-Acylamino-3-vinylcephalosporanic acid derivatives, processes for their preparation, pharmaceutical compositions containing them; their starting compounds and their preparation
06/23/1981US4275008 Antiasthma prostaglandins
06/16/1981US4273785 Antilipemic agents, antiatheroscerotic agents
06/16/1981US4273718 2-Decarboxy-2-hydroxymethyl-9-deoxy-6ε,9αepoxy-16,16-difluoro-19-hydroxy-PGF1
06/16/1981CA1103082A1 Light-sensitive photographic material containing an unsaturated cyclic thioether dir compound
06/10/1981EP0029998A2 Cephem compounds, processes for their preparation and pharmaceutical compositions containing them
06/09/1981US4272546 Antilipemic, antiatherosclerotic
06/03/1981EP0029657A2 Pesticidal tetrazines, their use and compositions, processes for their preparation and preparation intermediates
06/03/1981EP0029557A2 7-Acylamino-3-substituted cephalosporanic acid derivatives, processes for their preparation and pharmaceutical compositions containing them
06/02/1981US4271157 Bactericides
06/02/1981US4271078 19-Hydroxy-6,9α-epoxymethano-PGF compounds
06/02/1981US4271077 19-Hydroxy-19-methyl-6-hydroxy-7a-homo-PGI1 compounds
06/02/1981CA1102327A1 Tetrazine derivatives
06/02/1981CA1102310A1 Solid cephalosporin salt
05/1981
05/27/1981EP0029202A1 Novel tetrazole-5-thiol esters and process for preparing cefamandole using same
05/27/1981EP0029183A1 Tetrazolyloxycarbon amides, process for their preparation and their use as herbicides
05/26/1981US4269779 19-Hydroxy-19-methyl-6-oxo-PGF1 amides
05/19/1981US4268509 New cephem compounds and processes for preparation thereof
05/12/1981US4267395 Useful as antihistamines
05/12/1981US4267371 Prostaglandins; asthma
05/12/1981US4267352 19-Hydroxy-19-methyl-6-oxo-PGF1 sulfonylamides
05/12/1981US4267114 Useful as antihistamines
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