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Class Information
Number: 548/545
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen as the only ring hetero atoms (class 540, subclass 1) > Hetero ring is five-membered consisting of one nitrogen and four carbons (e.g., halopyrrolidines, etc.) > Chalcogen attached directly to the five-membered hetero ring by nonionic bonding (e.g., 3-pyrrolidinols, etc.) > Chalcogen bonded directly to a ring carbon of the five-membered hetero ring which is adjacent to the ring nitrogen (e.g., 2-pyrrolidones, etc.) > And chalcogen bonded directly to the other ring carbon of the five-membered hetero ring which is adjacent to the ring nitrogen (e.g., succinimide, etc.)
Description: Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is also bonded to the other ring carbon of the five-membered hetero ring which is adjacent to the ring nitrogen.










Sub-classes under this class:

Class Number Class Name Patents
548/548 Carbon to carbon unsaturation between ring members of the five-membered hetero ring (e.g., maleimide, etc.) 177
548/547 Chalcogen attached indirectly to the five-membered hetero ring by acyclic nonionic bonding 252
548/546 Nitrogen attached directly or indirectly to the five-membered hetero ring by acyclic nonionic bonding 304


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8669281 Prodrugs of fumarates and their use in treating various diseases Mar. 11, 2014
8669369 Method and process for preparation and production of deuterated .OMEGA.-diphenylurea Mar. 11, 2014
8624038 Pyrrolidine-2,5-dione derivatives for use in friction modification Jan. 7, 2014
8614294 Pyrenyloxysulfonic acid fluorescent agents Dec. 24, 2013
8580973 Process for the preparation of 2,2-difluoroethylamine Nov. 12, 2013
8546444 Synthetic lactone formulations and method of use Oct. 1, 2013
8445612 Conjugation reactions May. 21, 2013
8435717 Compound for photoacid generator, resist composition using the same, and pattern-forming method May. 7, 2013
8298326 Tricyclic spacer systems for nonlinear optical devices Oct. 30, 2012
8188145 Synthetic lactone formulations and method of use May. 29, 2012
8153570 Quaternary ammonium salt detergents for use in lubricating compositions Apr. 10, 2012
8147569 Quaternary ammonium salt detergents for use in fuels Apr. 3, 2012
8093386 Thioaryl substituted inhibitors of zinc proteases and their use Jan. 10, 2012
8017790 Method for producing pyrrolidones from succinates from fermentation broths Sep. 13, 2011
7951211 Quaternary ammonium salt detergents for use in fuels May. 31, 2011
7947511 Intensified neutral loss tags and use thereof in mass spectrometry May. 24, 2011
7947093 Quaternary ammonium salt detergents for use in fuels May. 24, 2011
7894695 Tricyclic spacer systems for nonlinear optical devices Feb. 22, 2011
7812178 Isoquinoline compound and pharmaceutical use thereof Oct. 12, 2010
7732482 Compound from Antrodia camphorata and the use thereof Jun. 8, 2010
7662891 Amine salt compound of carboxylic acid having thermal dissociation portion and compounding agent for rubber vulcanization and rubber composition containing the same Feb. 16, 2010
7642323 Heterobifunctional poly(ethylene glycol) derivatives and methods for their preparation Jan. 5, 2010
7498447 Therapeutic compounds Mar. 3, 2009
7488818 Method for producing 1,4-diphenyl azetidinone derivatives Feb. 10, 2009
7482475 Therapeutic lactams Jan. 27, 2009
7476747 Substituted gamma lactams as therapeutic agents Jan. 13, 2009
7329685 1-Phenyl-2-oxo-3-sulfonylamino-pyrrolidine derivatives and related compounds as factor Xa inhibitors for the treatment of acute vascular diseases Feb. 12, 2008
7294649 Methamphetamine derivatives and conjugates for immunoassay Nov. 13, 2007
RE39744 Adamantane derivatives and process for producing them Jul. 24, 2007
7179779 Cationic bleach activator with enhanced hydrolytic stability Feb. 20, 2007
7144978 Multidrop tree branching functional polyethylene glycol, methods of preparing and using same Dec. 5, 2006
7091285 Adducts of mid-range vinylidene content polyisobutylene polymer products and methods for making the same Aug. 15, 2006
7078424 N-linked sulfonamides of N-heterocyclic carboxylic acids or carboxylic acid isosteres Jul. 18, 2006
7034015 Aminobenzoephenones Apr. 25, 2006
7030249 Process for converting .alpha.-angelica lactone to 5-methyl-N-alkyl-2-pyrrolidone using alkyl amines Apr. 18, 2006
RE38934 Method and reagents for N-alkylating ureides Jan. 10, 2006
6967107 N-aryl-carbamic acid ester-derived and valeric acid ester-derived cross-linkers and conjugates, and methods for their synthesis and use Nov. 22, 2005
6960667 Fluorescent maleimides and uses thereof Nov. 1, 2005
6943179 Biurethane derivatives Sep. 13, 2005
6939993 Method for separation of reaction products from catalysts Sep. 6, 2005
6933390 Process for the arylation of aza-heterocycles with activated aromatics in presence of caesium carbonate Aug. 23, 2005
6887952 N-aryl-carbamic acid ester-derived and valeric acid ester-derived cross-linkers and conjugates, and methods for their synthesis and use May. 3, 2005
6858736 Hexa-arm polyethylene glycol and its derivatives and the methods of preparation thereof Feb. 22, 2005
6806287 2-oxo-1-pyrrolidine derivatives, process for preparing them and their uses Oct. 19, 2004
6620946 Low shrinkage thermosetting resin compositions and methods of use thereof Sep. 16, 2003
6582928 Carbohydrate-directed cross-linking reagents Jun. 24, 2003
6570024 Process and intermediates May. 27, 2003
6528455 Phenoxy-and thiophenoxy acrylic acid compounds as herbicides Mar. 4, 2003
6451736 Substituted aromatic thiocarboxylic acid amides and their use as herbicides Sep. 17, 2002
6437009 Low foam n-alkyltartarimide and n-alkylmalimide wetting agents Aug. 20, 2002

1 2 3 4 5 6










 
 
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