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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7442841 | Extraction process A process for the separation of an alcohol from a non-polar solvent; a ketone from a non-polar solvent; an alcohol from a mixture of a ketone and a non-polar solvent; or a mixture ... | 10/28/2008 |
| 7378542 | Precursors to fluoroalkanol-containing olefin monomers, and associated methods of synthesis and use The invention provides alkene fluoroalkanol and fluorinated polyol precursors to fluoroalkanol-substituted α,β-unsaturated esters. The fluoroalkanol-substituted α,β-unsaturated esters are olefins that can be readily polymerized to provide fluoroalkanol-substitut... | 05/27/2008 |
| 7365235 | Processes for producing branched compounds via condensation and hydrogenation Processes for producing branched compounds are described wherein a carbonyl compound is condensed in the presence of a catalyst selected from the group consisting of acids and bases, to form an α,β-unsaturated condensation product; and the α,β-unsaturated conden... | 04/29/2008 |
| 6849767 | Method of hydroborating alcohols and reducing functional groups using a recyclable fluorous borane-sulfide A method of hydroborating an alkene or alkyne, or reducing an organic functionality, oxidizing primary and secondary alcohols using a fluorous borane-sulfide is disclosed. The method includes regeneration and recycling the fluorous borane-sulfide. ... | 02/01/2005 |
| 6774269 | Process for producing isopulegol A process for producing l-isopulegol by simple operations with safety in high yield. A process for producing isopulegol, which comprises selectively cyclizing citronellal in the presence of a tris(2,6-diarylphenoxy)aluminum catalyst represented by the following gene... | 08/10/2004 |
| 6664380 | Perfluorosulfonylmethide compounds; use thereof for carbon-carbon bond formation Free perfluorosulfonylmethide compounds and metal salts thereof show strong catalytic activity in carbon-carbon bond formation reactions, in amounts as low as 0.1 mole %. Fluorous media may be used, especially biphasic fluorous media enabling ready recycl... | 12/16/2003 |
| 6552235 | Process for the preparation of cyclohexanol A method for producing cyclohexanol by subjecting cyclohexene to a hydration reaction in the presence of water using a solid acid as a catalyst in which as a reaction solvent, there is used an organic solvent having a solubility in water at 25° C. of not... | 04/22/2003 |
| 6515185 | Method of producing cyclododecanone and cyclododecanol Cyclododecanone and cyclododecanol are produced each in high yield by reacting a epoxycyclododecane compound with hydrogen in the presence of a solid catalyst containing (a) catalytic component including a platinum group metal, (b) a promoter component in... | 02/04/2003 |
| 6476278 | Processes for the preparation of alcohols Alcohols are produced in a practical and advantageous method, by the hydrogenation of a carbonyl compound under mild conditions, by reacting the carbonyl compounds with hydrogen in the presence of a bipyridyl derivative, a group VIII transition metal comp... | 11/05/2002 |
| 6462206 | Catalytic reduction of ketones and aldehydes using organometallic ruthenium complexes Ketones and aldehydes are hydrogenated to the corresponding alcohol or alkyl group, using H2 gas as the stoichiometric reductant, and organometallic ruthenium complexes as the catalysts.... | 10/08/2002 |
| 6441253 | Method for the synthesis of taxanes A process for the preparation of a compound having the formula: ##STR1## the process comprising treating a compound having the formula: ##STR2## with an alkyl metal species or with a Lewis acid in the presence of a tertiary amine base, wherein P2 | 08/27/2002 |
| 6376722 | Lutein to zeaxanthin isomerization process and product A lutein to zeaxanthin isomerization process which includes a saponification or alkali treatment of a plant extract containing lutein followed by a heating period under controlled conditions, is carried out in the presence of a surface active agent having... | 04/23/2002 |
| 6342645 | Methods for the production and isolation of D-chiro-inositol from kasugamycin and the use of D-chiro-inositol obtained therefrom The present invention relates to methods for the production and isolation of D-chiro-inositol (DCI) from kasugamycin. More specifically, the present invention relates to a method of producing DCI by hydrolysis of kasugamycin with aqueous trifluoroacetic a... | 01/29/2002 |
| 6329557 | Purification of xanthophylls from marigold extracts that contain high levels of chlorophylls The present invention provides an industrial scale process for obtaining lutein and zeaxanthin concentrates of high purity from saponified marigold extracts that may have high levels of chlorophyll.... | 12/11/2001 |
| 6310262 | Process for preparing retiferol derivatives A new process prepares retiferol derivatives of formula I: ##STR1## wherein A is --C .ident.C-- or --CH.dbd.CH--, and R1 and R2 are independently of each other lower alkyl or lower perfluoroalkyl, one version couples ketones of formula 1I... | 10/30/2001 |
| 6291713 | Process of transferring , ଲ-unsaturated alkyl groups to electrophiles There is described a process of transferring ,ଲ-unsaturated alkyl groups to an electrophile (aldehyde, ketone, nitrile, imine, alkyne) by means of a masked zinc alkyl in an aprotic solvent.... | 09/18/2001 |
| 6262316 | Oral preparation for the prophylactic and therapeutic treatment of Helicobacter sp. infection An oral preparation for the prophylactic and/or therapeutic treatment of inflammation in the mucous membrane of mammalian gastrointestinal tract (especially the human stomach) caused by Hicobacter sp. (especially H. pylori) infection is described. The pre... | 07/17/2001 |
| 6215031 | 3-hydroxymethylcycloalkanols and process for producing them The present invention relates to a 3-hydroxymethylcycloalkanol of the following formula (1), and a process for production of a 3-hydroxymethylcycloalkanol of the formula (1) by reduction of 3-formylcycloalkanone or 3-formylcycloalkenone. In accordance wit... | 04/10/2001 |
| 6207865 | Method for the hydrogenation of carbonyl compounds A carbonyl compound or a mixture of two or more carbonyl compounds is catalytically hydrogenated in the presence of a Raney copper catalyst in the form of nuggets.... | 03/27/2001 |
| 6107528 | Iron complexes for bleach activation and stereospecific oxidation A bleach and oxidation catalyst is provided comprising a catalytically active iron complex which can activate hydrogen peroxide or peroxy acids, for example.... | 08/22/2000 |
| 6031140 | Process for producing isocamphyl cyclohexanoles A continuous process for preparing isocamphyl-cyclohexanols from isocamphy-guaiacol or isocamphyl-phenol compounds by hydrogenating one of said compounds with hydrogen at elevated temperature and elevated pressure, comprising the use of support-free molde... | 02/29/2000 |
| 6025323 | Use of cyclic ketones in perfumery The compounds of formula ##STR1## in which R stands for a methyl or ethyl group, are used as perfume ingredients for the preparation of perfuming compositions and perfumed articles, to which they confer aromatic and thujonic notes. The compounds ... | 02/15/2000 |
| 5973211 | Pigmenting efficiency of a natural xanthophyll by isomerization A method of isomerizing lutein to yield a mixture of epimers of zeaxanthin includes the following steps: mixing a lutein-containing extract in a glycol solution to obtain a mixture, treating the mixture with alkali to obtain an alkali-containing mixture, ... | 10/26/1999 |
| 5959153 | Process for decomposing cycloalkylhydroperoxide Process for decomposing a mixture containing cycloalkylhydroperoxide, which mixture includes an organic phase and an aqueous phase wherein, during the decomposition, at least one compound is present which meets the following parameters: A>-0.5 and B>-1.0 ... | 09/28/1999 |
| 5942645 | Hydrogenation of aromatic compounds in which at least one hydroxyl group is bonded to an aromatic ring A process for hydrogenating aromatic compounds in which at least one hydroxyl group is bonded to an aromatic ring comprises bringing at least one of these compounds into contact with free hydrogen in the presence of a catalyst, wherein the catalyst compri... | 08/24/1999 |
| 5932774 | Processes for the preparation of D-chiro-inositol A method for the preparation of D-chiro-inositol from kasugamycin, comprising the steps of: (a) reacting kasugamycin with an acetylating agent to form a crude hexa-acetate intermediate; (b) purifying the crude intermediate to form purified hexa-acetate in... | 08/03/1999 |
| 5919986 | D-homo vitamin D3 derivatives Compounds of formula I: ##STR1## wherein the dotted carbon-carbon bond in the D-ring is C--C or C.dbd.C; C(R,R) is CH2 or C.dbd.CH2, R1 is H, F or OH, R2 and R3 are each independently C1-4 ... | 07/06/1999 |
| 5905173 | Process for decomposing cycloalkyl hydroperoxide The invention relates to a process for decomposing a mixture containing cycloalkyl hydroperoxide with an aqueous phase containing alkali metal hydroxide where, besides the alkali metal hydroxide, there is also at least 10 wt. % of the aqueous phase of one... | 05/18/1999 |
| 5892133 | Repellent agent against harmful insects and perfume composition containing the same A repellent agent containing a 3-substituted p-menthane (or p-menthene) derivative represented by the following formula (1) is disclosed: ##STR1## In the formula, R is a hydroxy group or hydroxyethyl group; R2 is a hydrogen atom, hydroxy g... | 04/06/1999 |
| 5876782 | Method for the conversion of xanthophylls in plant material This invention relates to the in sito process for converting non-free form xanthophylls to free xanthophylls in the biological material of the plant. The method, more particularly, relates to a method that would liberate xanthophylls by transesterificatio... | 03/02/1999 |
| 5856590 | Process for producing cis-4-t-butylcyclohexanol A process whereby 4-t-butylcyclohexanol with a high content of the cis-isomer, which is useful as a perfume ingredient, can be economically produced on an industrially available scale at a low cost. The process comprises hydrogenating 4-t-butylcyclohexano... | 01/05/1999 |
| 5850086 | Iron complexes for bleach activation and stereospecific oxidation A bleach and oxidation catalyst is provided comprising a catalytically active iron complex which can activate hydrogen peroxide or peroxy acids, for example.... | 12/15/1998 |
| 5834606 | Synthesis of conduritol epoxides and aziridines and methods of using such to synthesize higher disaccharides There are described novel coupling reactions useful for the preparation of cyclitol and/or carbohydrate conjugates and carbocyclic analogs thereof. Such coupling reactions employ epoxides and/or aziridines described herein as electrophilic recipients of o... | 11/10/1998 |
| 5763689 | CIS-dihydroxycyclohexadienes and their preparation This application relates to 3-substituted and 4-substituted cis-diols. Specifically, there are provided 3-substituted diols of formula (II) and 4-substituted cis-diols having (1S, 2R) and (1R, 2S) absolute configurations of formulae (III) and (IV). Also p... | 06/09/1998 |
| 5750804 | Process for producing trans-3-isocamphylcyclohexanol A process whereby trans-3-isocamphylcyclohexanol, which is useful as a perfume ingredient, can be produced on an industrially available scale, at a low cost and at a high stereoselectivity, is disclosed. The process comprises hydrogenating 3-isocamphylcyc... | 05/12/1998 |
| 5648564 | Process for the formation, isolation and purification of comestible xanthophyll crystals from plants A process for forming, isolating and purifying xanthophyll crystals, preferably lutein from marigold flower petals, zeaxanthin from wolfberries or capsanthin and capsorubin from red pepper, is disclosed. A xanthophyll diester-containing plant extract is s... | 07/15/1997 |
| 5614641 | Process for enantioselective hydrogenation of the oxo C.dbd.O double bond The present invention concerns a process for enantioselective catalytic hydrogenation of the ketone C.dbd.O double bond to a secondary alcohol function, said process using a neutral ruthenium complex as the catalyst and a compound containing a C.dbd.O gro... | 03/25/1997 |
| 5574196 | Process for preparing alkanols A process for preparing tertiary alkanols which comprises the step of oxidizing with ozone a saturated hydrocarbon having a tertiary carbon center in the presence of a carboxylic acid and for a sufficient period of time and at suitable temperature and pre... | 11/12/1996 |
| 5523494 | Process for the isomerization of lutein A process to obtain a product with a high zeaxanthin content, to be used mainly as an ingredient in poultry feed to enhance the pigmentation of broiler chickens and egg yolk, by reacting at a controlled temperature and pressure, marigold (Tagetes erecta L... | 06/04/1996 |
| 5516950 | Method for the production of D-chiroinositol The present invention relates to the synthesis of D-chiroinositol from a dialdose, comprising the steps of condensing the dialdose by an acyloin condensation reaction to form an inosose, protecting the carbon atoms at the 2, 3, 4 and 5 positions, reducing... | 05/14/1996 |
