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)
05/1981
05/06/1981EP0028063A1 Phenol derivatives, processes for their preparation and pharmaceutical compositions containing them
05/05/1981US4265820 Antiasthmatic activity
05/05/1981CA1100699A1 Bis-tetrazoles as chemical blowing agents
04/1981
04/29/1981EP0027599A2 Cephem compounds, processes for their preparation and pharmaceutical compositions containing them
04/28/1981US4264595 7-[2-(2-Imino-4-thiazolin-4-yl)-2-(syn)-hydroxy-iminoacetamido]-cephalosporins
04/21/1981US4263210 19-Hydroxy-4-oxo-PGI1 compounds
04/14/1981US4261903 Antiasthmatic prostaglandins
04/14/1981US4261902 19-Hydroxy-6-alkoxy-PGI1 compounds
04/08/1981EP0026519A1 Photographic silver halide emulsion material containing an antifoggant precursor
03/1981
03/31/1981US4259515 Anti-asthmatic prostaglandins
03/31/1981US4259474 Metal working lubricants
03/31/1981US4259340 Prophylactic chemotherapy of allergic conditions such as asthma
03/31/1981US4259245 19-Hydroxy-19-methyl-6-hydroxy-PGI1 compounds
03/25/1981EP0025692A1 Quinone derivatives, their production and use
03/25/1981EP0025687A1 15-Methanesulfonamidoprostaglandin derivatives, pharmaceutical compositions thereof and process therefor
03/24/1981US4257965 19-Hydroxy-19-methyl-5-hydroxy-PGI compounds
03/24/1981US4257964 19-Hydroxy-6,7-didehydro-PGI1 compounds
03/24/1981US4257963 19-Hydroxy-19-methyl-7,8-didehydro-PGI1 compounds
03/24/1981US4257779 Hydrocarbylsuccinic anhydride and aminotriazole reaction product additive for fuel and mineral oils
03/24/1981CA1098116A1 Cephalosporin derivatives
03/17/1981US4256905 19-Hydroxy-19-methyl-6a-carba-PGI2 compounds
03/17/1981US4256667 2-Decarboxy-2-aminomethyl-19-hydroxy-19-methyl-6a-carba-PGI2 compounds
03/17/1981US4256663 19-Hydroxy-19-methyl-6a-carba-PGI2 amides
03/17/1981US4256648 Antihistamines
03/17/1981CA1097669A1 4-nitro-2-trichloromethylphenyl disulfides
03/10/1981US4255575 Hypotensive, antispasmodic, adrenergic blocking agents
03/10/1981US4255354 Antihistamines
03/10/1981US4255339 Prostaglandins; asthma
03/03/1981US4254260 3-Substituted-7-substituted alkanamido-3-cephem-4-carboxylic acid compounds
03/03/1981US4254138 Esters of 4-(monoalkylamino)benzoic hydroxyalkanoic acids
03/03/1981US4254058 Antiasthmatic prostaglandins
03/03/1981US4254042 19-Hydroxy-19-methyl-4,5-didehydro-PGI1 compounds
03/03/1981US4254041 19-Hydroxy-5-hydroxy-PGI compounds
03/03/1981US4254040 Prostaglandins as antiasthmatic agents
02/1981
02/24/1981US4252978 19-Hydroxy-6-oxo-PGF1 sulfonylamides
02/24/1981US4252815 Methods of treating cardiovascular diseases with phenyltetrazolyloxy propanolamines
02/24/1981US4252747 Antiasthmatic; prostaglandins
02/17/1981US4251531 Antiallergens
02/17/1981US4251464 2-Decarboxy-2-aminomethyl-19-hydroxy-6-oxo-PGE1 compounds
02/17/1981CA1095915A1 Bis(1h-tetrazole-5-carboxamide) compounds
02/17/1981CA1095908A1 Morpholine derivatives as antibacterial agents
02/17/1981CA1095735A1 Herbicidal compositions
02/11/1981EP0023578A1 Aminoalkylbenzene derivatives, process for their preparation and pharmaceutical compositions
02/10/1981US4250252 A development-inhibitor-releasing compound comprising a 5-(sulfoamido-1-indanone-2-yl)thio-tetrazole
02/04/1981EP0023308A1 N-acyl-piperidone cetals, process for their preparation and their use as antidotes in the protection of crop plants against damage by herbicides
02/04/1981EP0023307A1 N-(alpha-chloropropionyl)-1,2,3,4-tetrahydroisoquinoline, process for its preparation and its use as antidote in the protection of crop plants against damage by herbicides
02/04/1981EP0023306A1 N-(Alpha-chloropropionyl)-1,2,3,4-tetrahydro-quinaldine, process for its preparation and its use as antidote in preventing damage to crops by herbicides
02/04/1981EP0023287A1 Antidote for the protection of cultivated plants against damage by herbicides
02/03/1981US4248962 Photographic emulsions, elements and processes utilizing release compounds
02/03/1981CA1095041A1 0-2-isocephem antibacterial agents and processes and intermediates for their production
02/03/1981CA1095033A2 Preparation of optically active cyclopentyl derivatives
02/03/1981CA1095032A1 Mono-deuterated, 15-hydroxyprostaglandins
01/1981
01/27/1981CA1094565A1 Benzamide derivatives
01/20/1981US4246333 Development inhibitor precursor and a photographic element containing the same
01/14/1981EP0022229A1 Substituted phenol ethers, their preparation, intermediates therefor, pharmaceutical compositions containing them and the preparation thereof
01/13/1981US4244887 Fertility control, abortion, oxytocic, antiulcer, antisecretory
01/06/1981CA1093082A2 Preparation of optically active cyclopentyl derivatives
12/1980
12/30/1980US4242507 With n-hydroxybenzotriazoles and n-hydroxy oxo-substituted dihydrobenzotriazine, condensation agents
12/23/1980US4241057 Cephalosporins
12/23/1980CA1092103A1 11-deoxy acetylenic aryl prostaglandins
12/09/1980US4238414 2-Decarboxy-2-aminomethyl-6a-carba-PGI2 compounds
12/02/1980US4237127 Miticides, larvicides, ovicides
11/1980
11/26/1980EP0019308A1 Tetrazole derivatives and a process for their preparation
11/25/1980US4236002 Antibiotics
11/18/1980US4234678 Light-sensitive silver halide photographic materials
11/12/1980EP0018669A1 1-(2-Sulfamoylaminoethyl)-1,4-dihydro-5H-tetrazole-5-thione and its salts
11/04/1980US4232173 15-Sulfonamidoprostaglandin derivatives
11/04/1980CA1088931A2 Preparation of 9-oxo tetrahydropyranyl substituted prostaglandin intermediates
11/04/1980CA1088930A2 Preparation of 9-hydroxy tetrahydropyranyl substituted prostaglandin intermediates
10/1980
10/28/1980US4230849 Conversion to amides and esters
10/21/1980US4229363 Intermediates for cephalosporin and penicillin derivatives
10/21/1980CA1088049A1 3-substituted-7-substituted alkanamido-3-cephem-4- carboxylic acid compounds and processes for preparation thereof
10/14/1980CA1087613A1 Prostaglandin synthesis and novel intermediates therefor
10/07/1980US4226934 Silver halide emulsions, hetero-heterothioacetophenones
09/1980
09/30/1980US4225508 19-Hydroxy-PGI2 compounds
09/30/1980US4225507 Prostaglandins, inhibition of blood platelate aggregation
09/30/1980CA1086760A1 Process for preparing bis(amidinoureas)
09/30/1980CA1086729A1 Tetrazole-5-carboxamide derivatives
09/23/1980US4224441 Antibiotics
09/16/1980CA1085831A1 Preparation of substituted w-pentanorprostaglandins
09/02/1980US4220644 7-Acylamino-3-(substituted tetrazolyl thiomethyl) cephalosporins
08/1980
08/19/1980CA1084051A1 3,4-dihydro-quinazoline derivatives and process for their preparation
08/06/1980EP0013762A2 Cephem and cepham compounds, processes for their preparation, pharmaceutical compositions containing them
08/05/1980US4216330 Hypolipidemic and antiatherosclerotic agents
08/05/1980US4216313 Antiviral thiazinyl benzimidazoles
07/1980
07/08/1980CA1081219A1 Acylamino derivatives
07/01/1980US4210587 7-Acylamino-3-[1-[2-(carboxymethylamino)ethyl]tetrazol-5-ylthio methyl]-3-cephem-4-carboxylic acids
06/1980
06/25/1980EP0012230A1 Process for producing 1H-tetrazole-1 acetic acid and its esters
06/24/1980US4209624 Process for preparing substituted bis(amidinoureas)
05/1980
05/06/1980CA1076871A1 Indanone derivatives with a sulphamyl group in the aromatic ring as dir compounds
04/1980
04/29/1980US4200466 Light-sensitive silver halide photographic materials
04/29/1980CA1076582A1 Antiviral thiazolinyl or thiazinyl ketobenzimidazoles
04/15/1980US4198522 Hypolipidemic acnd anti-atherosclerotic agents
04/15/1980US4198406 Antibiotic
04/08/1980US4197240 Penicillin derivatives
04/01/1980US4196208 Antilipemic agents
04/01/1980CA1074797A1 Process for the preparation of substituted phenyl-amidines
03/1980
03/25/1980CA1074296A1 3-acyloxymethylcephem compounds
03/04/1980US4191840 Oxamic acid derivatives
03/04/1980CA1072965A1 2-substituted 5-trifluoromethyl-1,3,4-thiadiazoles and their use as fungicides and insecticides
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