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Class Information
Number: 549/328
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) > Oxygen containing hetero ring (e.g., dioxirane, etc.) > Lactones (i.e., -c(=x)o-, wherein x is chalcogen, is part of the hetero ring) > Four-membered lactone ring formed
Description: Processes whereby a four-membered lactone ring is formed.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7498450 |
Homogeneous process for the hydrogenation of dicarboxylic acids and/or anhydrides thereof |
Mar. 3, 2009 |
| 7420064 |
Catalyst and method for the carbonylation of oxiranes |
Sep. 2, 2008 |
| 7145022 |
Catalyst for the carbonylation of oxiranes |
Dec. 5, 2006 |
| 7074822 |
Alkyl carbamate-substituted .beta.-lactones, process for their preparation, and pharmaceutical compositions containing them |
Jul. 11, 2006 |
| 6900242 |
Lactone formulations and method of use |
May. 31, 2005 |
| 6734314 |
Preparation of orlistat and orlistat crystalline forms |
May. 11, 2004 |
| 6699910 |
Ketone compounds and compositions for cholesterol management and related uses |
Mar. 2, 2004 |
| 6660448 |
Polymer, resist composition and patterning process |
Dec. 9, 2003 |
| 6642394 |
Process for producing (meth)acrylic anhydride and process for producing (meth)acrylic ester |
Nov. 4, 2003 |
| 6500961 |
Lactone compounds having alicyclic structure and their manufacturing method |
Dec. 31, 2002 |
| 6384242 |
Geranic acid derivatives |
May. 7, 2002 |
| 6348492 |
Oxetanone derivatives |
Feb. 19, 2002 |
| 6342519 |
Oxetanone derivatives |
Jan. 29, 2002 |
| 6323347 |
Catalyst for preparing lactone and a method for preparing lactone |
Nov. 27, 2001 |
| 6316095 |
2-oxetanone sizing agents and their use in paper |
Nov. 13, 2001 |
| 6156911 |
Purification of lipstatin |
Dec. 5, 2000 |
| 6147108 |
Method for treating type II diabetes mellitus |
Nov. 14, 2000 |
| 6075154 |
Method of preparation of 2,2'-bis(diarylphosphino)-6,6'-bis(trifluoromethyl)-1,1'-biphenyl, transition metal complex using it as ligand, and optically active 3-hydroxybutanoic acid ester d |
Jun. 13, 2000 |
| 5981771 |
Ruthenium-optically active phosphine complex, process for the preparation thereof and process for the preparation of optically active 4-methyl-2-oxetanone using same |
Nov. 9, 1999 |
| 5902886 |
Method for synthesizing oxetan-2-ones and intermediates for their preparation |
May. 11, 1999 |
| 5725731 |
2-oxetanone sizing agents comprising saturated and unsaturated tails, paper made with the 2-oxetanone sizing agents, and use of the paper in high speed converting and reprographic operations |
Mar. 10, 1998 |
| 5663298 |
UCK14 compounds |
Sep. 2, 1997 |
| 5530145 |
Anticholesteremic compounds |
Jun. 25, 1996 |
| 5498734 |
Preparation and use of (2-butene-1,4-diyl)magnesium complexes in organic synthesis |
Mar. 12, 1996 |
| 5491260 |
Process for manufacturing L-(-)-carnitine from derivatives having a configuration opposite to that of L-(-)-carnitine |
Feb. 13, 1996 |
| 5466708 |
Oxetanones |
Nov. 14, 1995 |
| 5466708 |
Oxetanones |
Nov. 14, 1995 |
| 5447717 |
Cholesterol-lowering agents |
Sep. 5, 1995 |
| 5412110 |
Enzymatic process to separate racemic mixtures of delta valerolactones |
May. 2, 1995 |
| 5412112 |
Derivatives and preparation of 2,2-dimethyl-5-substituted phenoxy-pentanoic acids |
May. 2, 1995 |
| 5412113 |
Process for manufacturing L-(-)-carnitine from a waste product having opposite configuration |
May. 2, 1995 |
| 5370774 |
Process for isolating pure diketene with recovery of materials of value |
Dec. 6, 1994 |
| 5362752 |
Chemical compounds |
Nov. 8, 1994 |
| 5359081 |
Carbonylation of epoxides |
Oct. 25, 1994 |
| 5310948 |
Carbonylation of epoxides |
May. 10, 1994 |
| 5278321 |
Process for simultaneously producing lactone and aromatic carboxylic acid |
Jan. 11, 1994 |
| 5260310 |
Oxetanone compounds and pharmaceutical compositions containing them |
Nov. 9, 1993 |
| 5256689 |
Cholesterol lowering compounds |
Oct. 26, 1993 |
| 5252754 |
Fluorinated aldoketene dimer structures and their use as combination oil and water resistant sizes for cellulosic materials |
Oct. 12, 1993 |
| 5200526 |
Syntheses of optically pure .alpha.-amino acids from 3-amino-2-oxetanone salts |
Apr. 6, 1993 |
| 5171878 |
Process for the preparation of .beta.-resorcylic acid derivatives |
Dec. 15, 1992 |
| 5155237 |
Preparation of 2,2-dihydrocarbyl-3-propiolactones |
Oct. 13, 1992 |
| 5136055 |
Method for production of dicarboxylic acid and lactone |
Aug. 4, 1992 |
| 5130157 |
Process for concentrating lactones |
Jul. 14, 1992 |
| 5110954 |
Dehydrogenation of diols |
May. 5, 1992 |
| 5079372 |
Method for producing a lactone |
Jan. 7, 1992 |
| 5004815 |
Method for synthesizing .beta.-lactones and alkenes |
Apr. 2, 1991 |
| 4999438 |
Process for the reduction of the polymer portion in the dimerization of ketene |
Mar. 12, 1991 |
| 4996333 |
Conversion of acetic acid into diketene and water using dimethylsulfoxide and pelargonic acid |
Feb. 26, 1991 |
| 4983746 |
Oxetanones and process for their production |
Jan. 8, 1991 |
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