| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 549475000 | Chalcogen bonded directly to the hetero ring | 19 |
| 20090005581 | Method for Preparing 3-Hydroxytetrahydrofuran Using Cyclodehydration - Disclosed is a method of preparing 3-hydroxytetrahydrofuran using cyclodehydration. More particularly, this invention relates to a method of preparing 3-hydroxytetrahydrofuran, including subjecting 1,2,4-butanetriol to cyclodehydration under reaction conditions of a reaction temperature of 30˜180° C. and reaction pressure of 5000 psig or less in the presence of a strong acid cation exchange resin catalyst having a sulfonic acid group as an exchange group. According to the method of this invention, 3-hydroxytetrahydrofuran can be economically prepared at higher yield and productivity than when using conventional methods. | 01-01-2009 |
| 20120178947 | PROCESS FOR HYDROGENATING 1,4-BUTYNEDIOL TO GIVE MIXTURES COMPRISING TETRAHYDROFURAN, 1,4-BUTANEDIOL AND GAMMA-BUTYROLACTONE IN THE GAS PHASE - Process for preparing tetrahydrofuran, 1,4-butanediol and/or gamma-butyrolactone by hydrogenation of 1,4-butynediol, wherein 1,4-butynediol is vaporized in a hydrogen-comprising gas stream and hydrogenated in gaseous form over at least one catalyst which comprises at least one of the elements of groups 7 to 11 of the Periodic Table of the Elements. | 07-12-2012 |
| 20130211108 | NOVEL PROCESS FOR THE PREPARATION OF (3S)-TETRAHYDROFURAN-3-YL (IS, 2R)-3-[[(4-AMINOPHENYL) SULFONYL] (ISOBUTYL) AMINO]-1-BENZYL-2-(PHOSPHONOOXY) PROPYLCARBAMATE AND ITS PHARMACEUTICALLY ACCEPTABLE SALTS - The present invention relates to a novel process for the preparation of Fosamprenavir or its pharmaceutically acceptable salts thereof by using novel intermediates. | 08-15-2013 |
| 20140135511 | METHOD FOR PRODUCING HYDRIDE USING UNSATURATED COMPOUND HAVING CARBON NUMBER OF 4 AS RAW MATERIAL - The present invention relates to a method for producing a hydride having a carbon number of 4, comprising contacting, in liquid phase, an unsaturated compound having a carbon number of 4 as a raw material with a solid catalyst obtained by loading a metal element belonging to Groups 9 to 11 of the long periodic table on a support, thereby performing hydrogenation to produce a corresponding hydride having a carbon number of 4, wherein hydrogenation is performed in the presence of, as a solvent, a 1,4-butanediol having a nitrogen component concentration of 1 ppm by weight to 1 wt % in terms of nitrogen atom. | 05-15-2014 |
| 20140275579 | NOVEL PROCESS FOR THE MANUFACTURE OF 3-OXO-TETRAHYDROFURAN - This invention relates to a novel method for the preparation of 3-oxo-tetrahydrofuran comprising oxidizing 3-hydroxy-tetrahydrofuran in the presence of a catalytic amount of 2,2,6,6-tetramethyl-piperidine-N-oxyl (TEMPO) with trichloroisocyanuric acid. | 09-18-2014 |
| 20150011782 | PROCESS FOR SYNTHESIS OF SYN AZIDO EPOXIDE AND ITS USE AS INTERMEDIATE FOR THE SYNTHESIS OF AMPRENAVIR & SAQUINAVIR - Disclosed herein is a novel route of synthesis of syn azide epoxide of formula 5, which is used as a common intermediate for asymmetric synthesis of HIV protease inhibitors such as Amprenavir, Fosamprenavir, Saquinavir and formal synthesis of Darunavir and Palinavir obtained by Cobalt-catalyzed hydrolytic kinetic resolution of racemic anti-(2SR,3SR)-3-azido-4-phenyl-1,2-epoxybutane (azido-epoxide). | 01-08-2015 |
| 20150298101 | METHOD FOR PRODUCING 3-HYDROXYTETRAHYDROFURAN AND METHOD FOR PRODUCING 1, 3-BUTANE DIOL - An object of the present invention is to provide a method for producing 3-hydroxytetrahydrofuran that can be used as a raw material for 1,3-butane diol, using as a raw material a compound that can be derived from biomass. | 10-22-2015 |
| 20150336918 | USE OF COMPOUNDS FROM ANTRODIA CAMPHORATA IN MANUFACTURING MEDICAMENTS FOR TREATING KIDNEY DISEASES - The present invention provides a use of compounds from | 11-26-2015 |
| 549476000 | Plural chalcogens bonded directly to the hetero ring | 7 |
| 20110172447 | METHOD FOR PREPARING FURANOSE COMPOUNDS - The present disclosure relates to p-toluene sulfonic acid salt of 5-amino-3-(2′-O-acetyl-3′-deoxy-beta-D-ribofuranosyl)-3H-thiazolo[4,5-d]pyrimidin-2-one and to its use in treating conditions such as viral infections, tumors, and cancer. | 07-14-2011 |
| 549477000 | Chalcogen double bonded directly to the hetero ring | 4 |
| 20100137620 | PROCESS FOR THE PREPARATION OF 1,4-DIALKYL-2,3-DIOL-1,4-BUTANEDIONE - The present invention relates to a process for the preparation of compounds of a 1,4-dialkyl-2,3-diol-1,4-butanedione by a acidic aldol condensation between an alkyl glyoxal and an α-hydroxy ketone. | 06-03-2010 |
| 20110124889 | Process for the oxidation of alcohol and/or aldehyde groups - A process for the oxidation of alcohol and/or aldehyde groups with a peroxo compound in the presence of a heterogeneous rhenium based catalyst, and a co-catalyst. The process of the invention may, for example, be applied to the manufacture of maleic acid which can be dehydrated to lead to maleic anhydride. | 05-26-2011 |
| 20130204017 | GLYCERYL ASCORBIC ACID ACYLATED DERIVATIVE OR ITS SALT, PRODUCTION METHOD THEREOF, AND COSMETICS - A glyceryl ascorbic acid acylated derivative or its salt, which has an ascorbic acid structure where 2- and/or 3-positions of the structure are substituted with glyceryl groups and some of the hydroxyl groups in the structure and/or in the glyceryl group are acylated, a production method of the glyceryl ascorbic acid acylated derivative and a cosmetic containing the glyceryl ascorbic acid acylated derivative or its salt are provided. | 08-08-2013 |
| 20140081036 | Solvent for Recovery of Maleic Anhydride from a Gas Stream - A process is described for producing crude maleic anhydride from a reactor effluent stream containing maleic anhydride. The reactor effluent stream is contacted with a solvent having a normal boiling point between about 250° C. and about 350° C., solubility of fumaric acid at least about 0.06 wt % at 60° C., solubility of maleic anhydride at least about 10 wt % at 60° C., solubility in water no higher than about 100 mg/L, density different from the density of water by at least about 0.020 g/mL, and water soluble hydrolysis products with molecular weight no higher than the molecular weight of pentanol. The solvent may be non-cyclic, non-aromatic, linear, and/or branched, and may have the general structure R | 03-20-2014 |
| 549478000 | Having -C(=X)-, wherein X is chalcogen, attached directly or indirectly to the hetero ring by nonionic bonding | 2 |
| 20140275580 | GLYCITAN ESTERS OF UNSATURATED FATTY ACIDS AND THEIR PREPARATION - A method is disclosed for making an unsaturated glycitan ester by reacting intramolecular condensates of glycitols having four or more carbons with a metathesis-derived unsaturated fatty acid in the presence of an alkaline catalyst and under conditions sufficient to form the aforesaid unsaturated glycitan fatty ester. A composition is also disclosed comprising a compound of the following structure: | 09-18-2014 |
| 20150307469 | Glycitan Esters of Unsaturated Fatty Acids and Their Preparation - A method is disclosed for making an unsaturated glycitan ester by reacting intramolecular condensates of glycitols having four or more carbons with a metathesis-derived unsaturated fatty acid in the presence of an alkaline catalyst and under conditions sufficient to form the aforesaid unsaturated glycitan fatty ester. A composition is also disclosed comprising a compound of the following structure: | 10-29-2015 |
| 549479000 | Double bond between ring members of the hetero ring | 4 |
| 20090281337 | Pyridazine compound and use thereof - A pyridazine compound represented by formula (1): | 11-12-2009 |
| 20110301365 | ALPHA-SUBSTITUTED ALPHA, BETA-UNSATURATED E- OR Z-ALDEHYDES, USE THEREOF, AND PROCESSES FOR THEIR PREPARATION ALPHA, BETA - This invention relates to novel alpha-substituted α,β-unsaturated E- or Z-aldehydes, or isomer mixture thereof, of the formula | 12-08-2011 |
| 20120330038 | BIS-PHOSPHATE COMPOUND AND ASYMMETRIC REACTION USING THE SAME - A novel bis-phosphate compound is provided which can be applied to a wide range of reactive substrates and reactions as an asymmetric reaction catalyst and can realize an asymmetric reaction affording a high yield and a high enantiomeric excess. The bis-phosphate compound has a tetraaryl skeleton represented by General Formula (1). In an asymmetric reaction, an amidodiene and an unsaturated aldehyde compound are reacted with each other in the presence of the optically active bis-phosphate compound to give an optically active amidoaldehyde. The invention allows a reaction such as an asymmetric Diels-Alder reaction to proceed efficiently, which has been difficult with conventional mono-phosphate compounds. Thus, the invention enables an industrially feasible method for the production of optically active amidoaldehydes, optically active β-amino acid derivatives, optically active diamine compounds, optically active pyrrolidine derivatives and optically active dihydropyran derivatives which are useful as products such as medicines, agricultural chemicals and chemical products as well as synthesis intermediates for such products. | 12-27-2012 |
| 20140350271 | PROCESS FOR CHEMICAL CONVERSION OF CELLULOSE ISOLATED FROM AROMATIC SPENT BIOMASS TO HYDROXY METHYL FURFURAL - The present invention relates to a process for chemical conversion of cellulose isolated from aromatic spent biomass to hydroxymethyl furfural using an eco-friendly and economical liquids system with recoverable and reusable solid Indion catalysts and zeolite-phosphomolybdic acid hybrid catalysts. The present invention further relates to the preparation of an effective hybrid catalyst i.e. zeolite-phosphomolybdic acid catalyst for synthesis of HMF. The selectivity and yield of HMF is nearly doubled in zeolite-phosphomolybdic acid hybrid catalyst compared to the individual catalysts (zeolite or phosphomolybdic acid) or combination of catalysts viz. zeolite and phosphomolybdic acid. | 11-27-2014 |
