| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 549381000 |
Polycyclo ring system having the hetero ring as one of the cyclos
| 194 |
| 549357000 |
Plural ring oxygens in the hetero ring (e.g., 1,2-dioxin, etc.)
| 79 |
| 549416000 |
Chalcogen bonded directly to the hetero ring
| 35 |
| 549414000 |
Plural hetero rings
| 12 |
| 549427000 |
Chalcogen attached indirectly to the hetero ring by nonionic bonding
| 8 |
| 549424000 |
Nitrogen bonded directly to the hetero ring
| 8 |
| 549426000 |
Nitrogen attached indirectly to the hetero ring by nonionic bonding | 4 |
| 20090209770 | CIS-2, 6-DISUBSTITUTED TETRAHYDROPYRAN DERIVATIVES AND PREPARATION METHOD THEREOF - Disclosed are cis-2,6-disubstituted tetrahydropyran derivatives represented by Chemical Formula 1 and a preparation method thereof. The tetrahydropyran derivatives can be prepared by Prins-reacting tetrahydropyran derivatives with homopargylicalcohol derivatives in the presence of trimethylsilyltriflate. The tetrahydropyran derivatives with cis-substituents at both C2 and C6 positions of the tetrahydropyran ring are useful as intermediates for use in the synthesis and development of therapeutically effective, naturally occurring compounds. | 08-20-2009 |
| 20100311989 | PROCESS FOR THE PREPARATION OF RENIN INHIBITORS - Disclosed is a process for the preparation of tetrahydropyran-di-amine represented by Structural Formula (I): wherein R | 12-09-2010 |
| 20140012020 | Hepatitis C Virus Inhibitors - The present disclosure relates to compounds, compositions and methods for the treatment of hepatitis C virus (HCV) infection. Also disclosed are pharmaceutical compositions containing such compounds and methods for using these compounds in the treatment of HCV infection. | 01-09-2014 |
| 20150322031 | Hepatitis C Virus Inhibitors - The present disclosure relates to compounds, compositions and methods for the treatment of Hepatitis C virus (HCV) infection. Also disclosed are pharmaceutical compositions containing such compounds and methods for using these compounds in the treatment of HCV infection. | 11-12-2015 |
| 549425000 |
Having -C(=X)-, wherein X is chalcogen, bonded directly to the hetero ring | 1 |
| 20080306287 | Process for Preparing Tetrahydropyran-4-Carboxylic Acid Compound - The present invention is to provide a process for preparing tetrahydropyran-4-carboxylic acid represented by the formula (1): | 12-11-2008 |
| Entries |
| Document | Title | Date |
|---|
| 20100197943 | Biodiesel production unit and biodiesel compositions - A biodiesel composition and method are disclosed and claimed whereby a biodiesel fuel is produced without glycerin waste and which has a could point below 32° F. | 08-05-2010 |
| 20100274030 | CYCLIC ETHERS - A process of preparing cyclic ethers is described. The process involves the reaction of at least one organic compound such as a dioi or a polyol which it has at least one pair of hydroxyl groups separated by 4 or 5 carbon atoms, and which is capable of being converted into an ether linkage, with an organic carbonate in the presence of a base. The base is an alkoxy, a carbonate or a hydroxide base or is a mixture of such bases. At least one of the hydroxyl groups of the organic compound is not a tertiary hydroxyl group. | 10-28-2010 |
| 20110087035 | PROCESS FOR THE PREPARATION OF DIHYDROPYRAN - The present invention relates to a process for the preparation of 2,3-dihydropyran (DHP, CAS [110-87-2]) and its use in industrial chemistry. | 04-14-2011 |
| 20110087036 | PROCESS FOR PREPARING DIHYDROPYRAN AND ITS USE AS PROTECTIVE AGENT - A process for the protection of a compound having at least one reactive functional group selected from hydroxy, mercapto, carboxyl, amino and amide, with 3,4-dihydro-2H-pyran (DHP), wherein said DHP is obtained by contacting tetrahydrofurfuryl alcohol (THFA) entrained in a carrier gas with a catalyst comprising aluminium oxide (Al | 04-14-2011 |
| 20110257416 | SYNTHESIS OF LIQUID FUELS AND CHEMICALS FROM OXYGENATED HYDROCARBONS - Processes and reactor systems are provided for the conversion of oxygenated hydrocarbons to hydrocarbons, ketones, cyclic ethers and alcohols useful as liquid fuels, such as gasoline, jet fuel or diesel fuel, and industrial chemicals. The process involves the conversion of oxygenated hydrocarbons, such as alcohols, ketones, aldehydes, furans, carboxylic acids, diols, triols, and/or other polyols, to C | 10-20-2011 |
| 20130072696 | CATALYTIC DEHYDRATION OF ALCOHOLS AND ETHERS OVER A TERNARY MIXED OXIDE - A ternary V—Ti—P mixed oxide is shown to catalytically dehydrate 2-methyl-tetrahydrofuran in high conversion to give piperylene, in good yield. Volatile products collected from this reaction contain piperylene in concentrations as high as 80 percent by weight. Dehydration of glycerol to acrolein in high conversion and moderate selectivity is also demonstrated. The catalyst is also shown to dehydrate other alcohols and ether substrates. The catalyst is resistant to deactivation and maintains activity between runs. | 03-21-2013 |
| 20130109867 | PROCESS FOR THE PREPARATION OF CIS-ROSE OXIDE | 05-02-2013 |
| 20130116449 | SINGLE-REACTOR PROCESS FOR PRODUCING LIQUID-PHASE ORGANIC COMPOUNDS FROM BIOMASS - Disclosed is a method for preparing liquid fuel and chemical intermediates from biomass-derived oxygenated hydrocarbons. The method includes the steps of reacting in a single reactor an aqueous solution of a biomass-derived, water-soluble oxygenated hydrocarbon reactant, in the presence of a catalyst comprising a metal selected from the group consisting of Cr, Mn, Fe, Co, Ni, Cu, Mo, Tc, Ru, Rh, Pd, Ag, W, Re, Os, Ir, Pt, and Au, at a temperature, and a pressure, and for a time sufficient to yield a self-separating, three-phase product stream comprising a vapor phase, an organic phase containing linear and/or cyclic mono-oxygenated hydrocarbons, and an aqueous phase. | 05-09-2013 |
| 20140107352 | PROCESS FOR THE INTEGRATED PREPARATION OF 2-SUBSTITUTED 4-HYDROXY-4-METHYLTETRAHYDROPYRANS AND OF 2-SUBSTITUTED 4-METHYLTETRAHYDROPYRANS - The present invention relates to a process for the integrated preparation of 2-substituted 4-hydroxy-4-methyltetrahydropyrans and of 2-substituted 4-methyltetrahydropyrans. | 04-17-2014 |
| 20140107353 | Reductive Biomass Liquefaction - The present invention provides methods, reactor systems, and catalysts for converting in a continuous process biomass to less complex oxygenated compounds for use in downstream processes to produce biofuels and chemicals. The invention includes methods of converting the components of biomass, such as hemicellulose, cellulose and lignin, to water-soluble materials, including lignocellulosic derivatives, cellulosic derivatives, hemicellulosic derivatives, carbohydrates, starches, polysaccharides, disaccharides, monosaccharides, sugars, sugar alcohols, alditols, polyols, diols, alcohols, ketones, cyclic ethers, esters, carboxylic acids, aldehydes, and mixtures thereof, using hydrogen and a heterogeneous liquefaction catalyst. | 04-17-2014 |
| 20160096814 | METHOD FOR PRODUCING DEHYDRO ROSE OXIDE - The present invention relates to a method for producing dehydro rose oxide by reacting isoprenol and prenal in the presence of at least one sulfonic acid of formula R | 04-07-2016 |
