| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 549275000 |
Polycyclo ring system having the lactone ring as one of the cyclos
| 37 |
| 549274000 |
Plural ring oxygens in the lactone ring
| 30 |
| 549292000 |
Additional chalcogen bonded directly to the lactone ring
| 16 |
| 549291000 |
Acyclic -C(=X)-, wherein X is chalcogen, bonded directly to the lactone ring | 3 |
| 20090043115 | Process for Producing Simvastatin - The present invention discloses a process for producing Simvastatin and intermediate thereof. The present invention uses inexpensive and easily available reagents, its condition is mild, and it leaves out the protective and deprotective steps, which are necessary in prior methods. Compared with prior art, the esterifying condition in 8-position is greatly simplified. | 02-12-2009 |
| 20100004469 | ANTIMICROBIAL AGENTS AND MICROBICIDAL AGENTS - An antimicrobial agent comprising, as an active component, compounds represented by the following formula | 01-07-2010 |
| 20160122311 | SYNTHESIS OF COUMALIC ACID - A method to prepare coumalic acid comprising (a) heating a solution in dichloroethane of malic acid and sulfuric acid or a solution in dichloroethane of malic acid and a perfluorosulfonic acid or (b) adding an acid comprising sulfuric acid or a perfluorosulfonic acid to a solution of malic acid in dichloroethane to yield a solution that is heated for a period of time so as to convert the malic acid into a major amount of coumalic acid and, optionally, a minor amount of fumaric acid. | 05-05-2016 |
| 549294000 |
Double bond between ring members of the lactone ring | 3 |
| 20120215013 | HYDROGEN STORAGE MATERIAL - The invention provides a hydrogen storage material comprising a porous carbon material having oxygen-containing functional groups on the surface, and Li bonded to the surface of the porous carbon material. The hydrogen storage material of the invention has more excellent hydrogen storage capacity than the prior art. | 08-23-2012 |
| 20150087846 | PPARs AGONIST ACTIVITY ENHANCING DRUG - A lifestyle disease improving drug that enhances PPARα, δ and γ agonist activities that includes a compound having the lactone structure in accordance with the chemical formula 6-alkyl-5,6-dihydro-2H-pyran-2-one, the alkyl containing 4, 5, or 6 carbons, and a method for synthesizing the compound. The method includes adding, stepwise, a butyllithium-hexane solution to a diisopropylamine-tetrahydrofuran solution, and then a 6-alkyltetrahydro-2H-pyran-2-one-tetrahydrofuran solution, wherein the alkyl contains 4, 5, or 6 carbons, adding a phenylselenyl choloride-tetrahydrofuran solution to produce a reaction mixture with a phenylselenide, extracting and purifying the phenylselenide, preparing a phenylselenide-tetrahydrofuran solution with the purified phenylselenide, and adding sodium bicarbonate and an aqueous hydrogen peroxide solution to the phenylselenide-tetrahydrofuran solution to produce a reaction mixture including the compound. | 03-26-2015 |
| 20160024041 | PPARs AGONIST ACTIVITY ENHANCING DRUG - A lifestyle disease improving drug that enhances PPARα, δ and γ agonist activities that includes a compound having the lactone structure in accordance with the chemical formula 6-alkyl-5,6-dihydro-2H-pyran-2-one, the alkyl containing 4, 5, or 6 carbons. | 01-28-2016 |
| 549293000 |
Nitrogen attached directly or indirectly to the lactone ring by nonionic bonding | 1 |
| 20090318714 | ORGANIC COMPOUNDS - The invention related to a novel process, novel process steps and novel intermediates useful in the synthesis of pharmaceutically active compounds, especially renin inhibitors, such as Aliskiren. Inter alia, the invention relates to a process for the manufacture of a compound of the formula VI, | 12-24-2009 |
| Entries |
| Document | Title | Date |
|---|
| 20080269508 | Method for Manufacture of 4-Hydroxy Pyran-2-One Derivatives - A process for preparation of 4-hydroxy-pyran-2-one derivative of formula (I), | 10-30-2008 |
| 20100130754 | HYDROGENATION OF ESTERS WITH RU/BIDENTATE LIGANDS COMPLEXES - The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Ru complexes with bidentate ligands, having one amino or imino coordinating group and one phosphino coordinating group, in hydrogenation processes for the reduction of esters or lactones into the corresponding alcohol or diol respectively. | 05-27-2010 |
| 20110237806 | PROCESS FOR PREPARING DELTA-VALEROLACTONE IN THE GAS PHASE - The process relates to a process for preparing delta-valerolactone (VLO) in the gas phase by catalytic dehydrogenation over at least two different catalysts. | 09-29-2011 |
| 20140094618 | CATALYTIC CONVERSION OF CELLULOSE TO LIQUID HYDROCARBON FUELS BY PROGRESSIVE REMOVAL OF OXYGEN TO FACILITATE SEPARATION PROCESSES AND ACHIEVE HIGH SELECTIVITIES - Described is a method to make liquid chemicals. The method includes deconstructing cellulose to yield a product mixture comprising levulinic acid and formic acid, converting the levulinic acid to γ-valerolactone, and converting the γ-valerolactone to pentanoic acid. Alternatively, the γ-valerolactone can be converted to a mixture of n-butenes. The pentanoic acid can be decarboxylated yield 1-butene or ketonized to yield 5-nonanone. The 5-nonanone can be hydrodeoxygenated to yield nonane, or 5-nonanone can be reduced to yield 5-nonanol. The 5-nonanol can be dehydrated to yield nonene, which can be dimerized to yield a mixture of C | 04-03-2014 |
| 20140303385 | ASYMMETRIC SYNTHESIS OF ORGANIC COMPOUNDS - The present invention provides processes for the production of chiral compounds in a stereoisomeric excess. The present processes involve reacting a hydrometallated alkene compound with a compound comprising a conjugated-bond system under conditions such that the compounds undergo an asymmetric 1,4- or 1,6-conjugate addition reaction, generating a chiral compound in a stereoisomeric excess. The reaction is performed in the presence of a metal catalyst, which catalyst preferably comprises a non-racemic chiral ligand. | 10-09-2014 |
| 20180022684 | PROCESS FOR THE PREPARATION OF ESTERS BY MEANS OF CARBONYLATION OF ETHERS | 01-25-2018 |
