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)
05/1982
05/12/1982EP0051381A1 O-sulfated beta-lactam hydroxamic acids
05/12/1982EP0051234A1 A process for the production of a 2-azetidinone derivative
05/05/1982EP0050965A1 Beta-lactamase inhibitory composition
04/1982
04/13/1982US4324900 3-Amino-4-C-carboxy-2,3,4,6-tetradeoxy-D-arabino-hexose trimethylene dithioacetal
04/07/1982EP0048953A2 Beta-lactam antibiotics
04/06/1982US4323575 1-Phenyl-2-aminoethanol derivatives
04/06/1982US4323567 Bactericides
03/1982
03/30/1982US4322345 2-Azetidinone 4-carboxy derivatives and a process for producing the same
03/30/1982CA1120935A1 MONOCYCLIC .beta.-LACTAMS WITH ANTIBACTERIAL ACTIVITY
03/24/1982EP0048096A1 Beta-lactam antibacterial agents
03/23/1982US4321197 1-Carba-6-(1-hydroxyethyl)-2-carbonyl-penem-3-carboxylic acid and preparation thereof
03/23/1982US4321193 Preparation of N-halo α,α-disubstituted β-lactams
03/09/1982US4319027 Process for the manufacture of ceohem enol derivatives
03/09/1982US4318912 6-(1-Hydroxyethyl)-3-substituted-1-azabicyclo(3.2.0)-hept-2-en-7-one-2-carboxylic acid
02/1982
02/24/1982EP0046363A1 Process for the preparation of 2-thio penem derivatives and intermediates therefor
02/17/1982EP0045964A1 Derivatives of 3-amino-1,2-propane diol
02/04/1982WO1982000291A1 Carba-2-penem compounds and process for preparing same
02/03/1982EP0045198A2 1,1-Disubstituted carba-2-penems and their production
02/03/1982EP0045161A1 Amides of 4-oxo-5-amidohexanoic acid derivatives
01/1982
01/26/1982US4312871 6-, 1- And 2-substituted-1-carbadethiapen-2-em-3-carboxylic acids
01/26/1982CA1117110A1 Carbostyril derivatives and process for preparation thereof
01/19/1982CA1116618A1 Substituted azetidin-2-one antibiotics
01/12/1982US4310538 Bactericides
01/05/1982US4309346 Process for the preparation of 1-carbapenems and intermediates via trithioorthoacetates
12/1981
12/23/1981EP0042026A1 3,4-Disubstituted azetidin-2-on compounds and process for their preparation
12/22/1981CA1114827A1 Process for 3beta-iminoazetidin-2-ones
12/16/1981EP0041768A2 Beta-lactam compounds, their preparation and use
12/08/1981US4304790 2-(Alkylthio, alkylsulfinyl or alkylsulfonyl)-4-[2-anilinoalkylamino)-1-hydroxyethyl]phenols and derivatives thereof
12/08/1981US4304718 2-Azetidinone compounds and processes for preparation thereof
11/1981
11/24/1981US4302391 Oxacephalosporin antibiotic intermediates
11/17/1981US4301279 Reaction of an unsaturated cephalosporin with a borohydride to produce the corresponding saturated compound
11/17/1981US4301278 Process for the manufacture of enol derivatives
11/17/1981US4301061 Stabilizers
11/04/1981EP0038869A1 Process for the preparation of 1-carbapenems, and intermediates for their preparation
11/03/1981US4298741 Dethiapenicillin antibiotics
11/03/1981CA1111856A1 Azetidinone derivatives and production thereof
11/03/1981CA1111854A1 Oxazolinoazetidinylbutyric acid derivatives
10/1981
10/28/1981EP0038661A2 Process for the preparation of beta-lactams
10/21/1981EP0038087A2 Beta-lactam containing compounds, their preparation and use
10/20/1981US4296117 1-Aryloxy-2-hydroxy-3-[(Benzimidazolinone-substituted alkyl)-amino]propanes and salts thereof
10/20/1981US4296037 Preparation from 1,1-diphenyl-1-(1-hydrocarbon-3-azetidinyl)acetonitriles, pharmaceutical intermediates
10/20/1981CA1111049A1 Process for 2-chlorosulfinylazetidin-4-ones
10/14/1981EP0037592A2 Beta-lactam compounds
10/13/1981US4294606 Herbicides
10/13/1981CA1110624A1 Cephalosporin analogues and processes for the preparation thereof
10/07/1981EP0037082A1 Process for the preparation of 1-carbapenems and intermediates via silyl-substituted dithioacetals
10/07/1981EP0037081A1 Process for the preparation of 1-carbapenems and intermediates via trithioorthoacetates
10/07/1981EP0037080A1 4-(3-carboxy-2-oxopropyl)-azetidino-2-ones and process for their preparation
10/06/1981US4293555 6- and 6,6-Disubstituted-2-substituted-oxapen-2-em-3-carboxylic acids
10/06/1981US4293495 Symmetrical azetidinone aldehyde disulfides and process
10/06/1981US4293493 Azetidinone alcohol disulfides and process for cyclization
10/06/1981US4293462 3-acylamino-4-thio-2-oxoazetidin-1-yl/-amino crotonic acids
10/06/1981CA1110252A2 MONOCYCLIC .beta.-LACTAMS AS INTERMEDIATES FOR THE PRODUCTION OF 0-2-ISOCEPHEM ANTIBACTERIAL AGENTS
09/1981
09/29/1981CA1109873A1 O-2-isocephem antibacterial agents and processes and intermediates for their production
09/22/1981US4290948 Process for their preparation of β-lactam antibacterial agents
09/22/1981US4290947 Process for the preparation of thienamycin and intermediates
09/16/1981EP0035743A1 Process for the preparation of dipeptides
09/16/1981EP0035689A1 4-Substituted-2-oxoazetidine compounds, processes for their preparation, and their use for preparing antibiotics
09/15/1981US4289696 Polycyclic compounds
09/15/1981US4289695 Reaction of a phenicillin with an n-chloro halogenating agent in presence of a crosslinked polyvinylpyridine
09/09/1981EP0035188A1 2-Penem compounds, pharmaceutical compositions containing them and methods for their preparation
09/08/1981US4288366 Method of preparation of 5,6-dehydropenicillins
09/08/1981US4288364 Fragmentation procedure for preparing 3-amino-azetidinones
09/01/1981US4287123 Synthesis of thienamycin via (3SR, 4RS)-3-((RS)-1-acyloxyethyl)-2-oxo-4-azetidineacetate
09/01/1981CA1108136A1 Antibacterial agents
08/1981
08/26/1981EP0034443A2 Beta-lactam antibacterial compounds, their preparation and pharmaceutical compositions containing them
08/11/1981US4283534 Reductive alkylation of nitrogen heterocycles
08/11/1981US4283333 α-[4-Oxoazetidin-1-yl]-acetic acid compounds useful as intermediates in preparing 1-oxadethiacephalosporins
08/04/1981US4282236 β-Lactam antibacterial agents, their use in pharmaceutical compositions, and intermediates
08/04/1981US4282150 Chemical intermediates for penicillins and cephalosporins
08/04/1981US4282148 Synthesis of thienamycin via esters of (3SR, 4RS)-3-[(SR)-1-hydroxyethyl]-β,2-dioxo-4-azetidinebutanoic acid
08/04/1981US4282145 Process for the preparation of azetidines
07/1981
07/28/1981US4281002 Antibiotics
07/22/1981EP0032400A1 (3SR, 4RS)-3-((RS)-1-hydroxyethyl)- and -((RS)-1-acyloxyethyl)-2-oxo-4-azetidineacetic acid compounds and a process for preparing the same
07/21/1981CA1105472A1 Process for preparing azetidinones
07/21/1981CA1105471A1 Process for 3beta-aminoazetiden-2-ones
07/21/1981CA1105470A1 Process for 3beta-aminoazetiden-2-ones
07/21/1981CA1105467A1 .beta.-LACTAM COMPOUNDS, PREPARATION AND USE
07/21/1981CA1105456A1 Aminoglycoside derivatives
07/21/1981CA1105455A1 Aminoglycoside derivatives
07/14/1981US4278793 Cephem derivative
07/14/1981CA1105035A1 Alkali metal salts of complex anions containing heteroatom substituents and electrolyte compositions containing these
07/08/1981EP0031509A1 Penem derivatives
07/01/1981EP0031237A1 Quinazoline derivatives, processes for their preparation, compositions containing them and their use as anti-cancer agents
06/1981
06/30/1981CA1104059A1 Carboxyalkanoyl derivatives of proline, pipecolic acid and azetidine-2-carboxylic acid
06/24/1981EP0030609A1 Process for the preparation of N-alpha-alkoxyalkyl carboxylic acid amides, some representatives of these compounds, and their ensuing products
06/23/1981US4275207 Process for preparing 7-(1-hydroxyethyl)-3-(2-aminoethylthio)-1-carbadethiaceph-3-em-3-carboxylic acid and intermediate therefor
06/23/1981CA1103674A1 .alpha.-(3-AZETIDINYL)-.alpha.-PHENYL ACETONITRILE AND ACETAMIDES
06/16/1981US4273709 Process for the preparation of thienamycin and intermediates
06/16/1981CA1103257A2 Proline derivatives and related compounds
06/16/1981CA1103256A2 Proline derivatives and related compounds
06/16/1981CA1103255A2 Proline derivatives and related compounds
06/10/1981EP0030032A2 6-, 1- and 2-substituted-1-carbadethiapen-2-em-3-carboxylic acids, processes for preparing the same, pharmaceutical compositions containing the same, and intermediates
06/10/1981EP0030031A2 6-(1-Hydroxyethyl)-2-(2-aminoethylthio)-1,1-disubstituted-1-carbadethiapen-2-em-3-carboxylic acids, a process for preparing the same, an antibiotic pharmaceutical composition comprising the same, intermediates useful in a synthesis of that kind and processes for preparing intermediates suitable for the synthesis of that kind
06/09/1981US4272437 Penicillins
06/09/1981CA1102801A1 N-phenyl-substituted n-heterocyclic compounds, their preparation and use in agents for regulating plant growth
06/02/1981CA1102337A2 Proline derivatives and related compounds
05/1981
05/27/1981EP0029265A2 A method for preparing azetidine derivatives, male sterility in plants producing compositions containing them, their use in sterilizing male parts in plants, a method of producing F1 hybrid seed and certain novel azetidine derivatives
05/26/1981US4269873 Penicillin derivatives
05/26/1981US4269773 Fused oxazolidine compounds
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