Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8093421 | Stereoselective one step fluorination process for the preparation of 2-flouropropionate The current invention describes a one-step process for the synthesis of 2-fluoropropionates from lactic acid ester derivatives using TFEDMA. ... | 01/10/2012 |
| 8039665 | Method for producing fluorine-containing carboxylic acid ester A method for producing a fluorine-containing carboxylic acid ester represented by the general formula R1HCFCOOR2 involves reacting a fluorine-containing ether represented by the general formula R1HCFCF2OR2 with ... | 10/18/2011 |
| 7820851 | Isotopically labeled polyfluorinated compound useful as an imaging tracer A polyfluorinated compound is provided inclusive of at least one 18F atom having a formula: CF3(CF2)nR1 (I) where R1 is —C(O)OR2, —C(O)N(R3)2 | 10/26/2010 |
| 7754914 | Method of recovering fluorinated acid surfactants from adsorbent particles loaded therewith The present invention provides a method of recovering a fluorinated acid surfactant or salt thereof from adsorbent particles to which said fluorinated acid surfactant has been adsorbed. The method comprises mixing adsorbent particles having adsorbed fluorinated acid... | 07/13/2010 |
| 7619111 | Stereoselective method for preparing a chiral fluorinated molecule A stereoselective method for preparing a chiral fluorinated molecule by converting a compound having a —OSOF group, a fluorosulfite, attached to a chiral carbon atom into a fluorinated compound by replacing the —OSOF group attached the chiral carbon with a fluor... | 11/17/2009 |
| 7470808 | Method for producing fluorine-containing acrylate A process for producing a fluorine-containing acrylic acid ester represented by CH2═C(Rf)(COOR) characterized in that 1-bromo-1-perfluoroalkylethene represented by CH2═CBr—Rf, or 1,2-dibromo-1-perfluoroalkylethane represented by CH2 | 12/30/2008 |
| 7425646 | Fluorinated adamantane derivative A compound represented by the formula AF(—COF)n, provided that AF and n have the following meanings. AF: a fluorinated adamantane residue which is an n-valent group having an n number of hydrogen atoms removed fro... | 09/16/2008 |
| 7420063 | Process for preparing a dipeptidyl peptidase IV inhibitor and intermediates employed therein A process is provided for preparing a dipeptidyl peptidase IV inhibitor of the structure is treated with TFAA in isopropyl acetate to protect the tertiary hydroxyl group as a trifluoroacetate group to form 4 | 09/02/2008 |
| 7314952 | Fluorinated adamantane derivatives The present invention provides novel compounds which are useful for the production of fluorinated adamantane derivatives excellent in etching resistance and useful as photolithographic material and so on. Namely, the present invention provides compounds represented ... | 01/01/2008 |
| 7304191 | Process for the synthesis of fluoroorganic compounds The present invention relates to a fluorination method for the synthesis of halofluoroorganic compounds which can be used, inter alia, as precursors in the synthesis of 2,3-unsaturated fluoroorganic carbonyl compounds comprising a fluorine substituent in the 2 posit... | 12/04/2007 |
| 7301045 | Method for preparing ester condensate The present invention provides a method for preparing ester or thioester that can conduct catalytic esterification reaction with an equimolar amount of carboxylic acid and alcohol, or catalytic thioesterification reaction with carboxylic acid and an equimolar amount... | 11/27/2007 |
| 7288684 | Process for the direct production of methanol from methane A process for the production of methanol from methane has been developed. The process involves reacting methane with an oxidant such as oxygen or a peroxide in the presence of a catalyst and a solvent in a reaction zone to produce an effluent stream comprising a met... | 10/30/2007 |
| 7253303 | Fluorination of dicarbonyl compounds The invention provides a method for the preparation of a dicarbonyl compound of formula (I) R1COCFR2COR3 wherein R1 is selected from alkyl, substituted alkyl, cycloalkyl, aryl, substituted aryl and acetoxy, R2 i... | 08/07/2007 |
| 7247289 | Porous aluminum fluoride A porous aluminum fluoride on which SbClxF5-x (wherein x represents a numeral of 0 to 5) is supported, SbClxF5-x being obtainable by supporting SbCl5, or the like on a porous aluminum fluoride and treating it wi... | 07/24/2007 |
| 7199262 | 3-Hydroxypropyl ester of 2-trifluoromethylacrylic acid and process for producing same The invention relates to a novel compound, 3-hydroxypropyl ester of 2-trifluoromethyl acrylic acid, represented by the formula [1]. The invention further relates to a process for producing the compound. This process includes reacting 2-trifluoromethylacrylic halide ... | 04/03/2007 |
| 7196226 | Fluoraminoolefins and fluorination reagents which can be prepared therefrom The present invention relates to fluorination reagents comprising 1-fluoro-1-aminoolefins and also processes for preparing fluorination reagents comprising 1-fluoro-1-aminoolefins. ... | 03/27/2007 |
| 7193105 | Histone deacetylase inhibitors based on trihalomethylcarbonyl compounds Histone deacetylase is a metallo-enzyme with zinc at the active site. Compounds having a zinc-binding moiety, for example, a trihalomethylcarbonyl group, such as a trifluoromethylcarbonyl group, can inhibit histone deacetylase. Histone deacetylase inhibition can rep... | 03/20/2007 |
| 7193106 | Halogenoacetoxyadamantane derivatives and process for production thereof Provided are a novel halogenoacetoxyadamantane derivative which is useful as a modifying agent for a resin for a photoresist and a dry etching resistance-improving agent in the photolithography field, agricultural and medical intermediates and a compound for other v... | 03/20/2007 |
| 7186846 | Process for preparing a dipeptidyl peptidase IV inhibitor and intermediates employed therein A process is provided for preparing a dipeptidyl peptidase IV inhibitor of the structure wherein is treated with TFAA in isopropyl acetate to protect the ter... | 03/06/2007 |
| 7161025 | Method for producing a fluorinated ester compound The present invention provides a method for producing industrially useful fluorine-containing compounds such as a fluorinated ester compound and an acid fluoride compound. Namely, the present invention resides in a method for producing a fluorinated ester com... | 01/09/2007 |
| 7145033 | Oxidation process in fluidized bed reactor A process for reacting in a fluid bed reactor at least one oxidizable reactant with molecular oxygen in the presence of a catalytically active fluidized bed of solid particles. In the process a molecular oxygen-containing gas having an oxygen concentration greater t... | 12/05/2006 |
| 7141704 | Process for preparing hydrofluoroethers Process for obtaining hydrofluoroethers of formula (I): A-(Rf)n0—CF(Rf1)—O—Rh (I) wherein a mono- or bifunctional carbonyl compound of formula (IV): B—Rf—C(O)Rf1... | 11/28/2006 |
| 7087710 | Polymeric surfactants derived from cyclic monomers having pendant fluorinated carbon groups A fluorine containing polymer which acts as a wetting, flow or leveling agent, and has at least one polar group. The polymer has at least one pendant or ether side chain containing from about 1 to about 20 carbon atoms with at least 25% of the hydrogen atoms being r... | 08/08/2006 |
| 7071272 | Method for preparing unsaturated compound by pyrolysis reaction The present invention provides a method for preparing a compound of CF3CF2CF2OCF═CF2 by pyrolyzing a compound expressed by CF3CF2CF2OCF(CF3)COOCF2CF(CF3)O... | 07/04/2006 |
| 7053238 | Process for producing fluorinated polyvalent carbonyl compound A fluorinated polyvalent carbonyl compound is produced by an economically advantageous method from inexpensive materials without requiring a complicated synthetic process step. Namely, the present invention comprises reacting a polyvalent alcohol having at least two... | 05/30/2006 |
| 7053237 | Process for producing a fluorinated ester, a fluorinated acyl fluoride and a fluorinated vinyl ether A process for producing a fluorinated ester through a small number of steps, is presented. The process for producing a fluorinated ester, comprises a transesterification step in which RAF—COOCF2—RAF and RA—CH2 | 05/30/2006 |
| 7053148 | Compositions of polysiloxanes, fluoropolymers extenders Fiber materials in the form of fabrics receive, as a result of treatment with compositions according to the invention, a pleasant soft hand and excellent oil-and water-repelling properties with good permanence. The compositions can be obtained by a) preparing a solu... | 05/30/2006 |
| 7034179 | Method for producing a fluorinated ester compound The present invention provides a method for producing industrially useful fluorine-containing compounds such as a fluorinated ester compound and an acid fluoride compound. Namely, the present invention resides in a method for producing a fluorinated ester com... | 04/25/2006 |
| 7030280 | Process for producing optically active β-trifluoromethyl-β-hydroxycarbonyl compound The present invention provides a process for producing an optically active β-trifluoromethyl-β-hydroxycarbonyl compound represented by formula (3): comprising a step of reacting a fluoral equivalent represented by for... | 04/18/2006 |
| 7019163 | Process for producing perfluorovinylcarboxylic acid ester The present invention relates to a method for producing a perfluorovinylcarboxylic acid ester by reacting a perfluorovinylcarboxylic acid salt with an alkylating agent. The present invention provides a method to produce perfluorovinylcarboxylic acid ester, which is ... | 03/28/2006 |
| 7015349 | Reduction of hair growth Compositions including a conjugate of α-difluoromethylornithine can be applied topically to reduce hair growth. ... | 03/21/2006 |
| 7012153 | Process for preparing benzoic acids An improved process for the preparation of 4[(2-piperidin-1-yl)ethoxy]benzoic acid derivatives, comprising reacting a haloalkyl amine of formula (III) with a compound of formula (IV) in the presence of a hydrated inorganic base in an appropriate solvent. ... | 03/14/2006 |
| 6992213 | Method for removing trifluoroethanol from liquids Trifluoroethanol can be isolated from organic liquids that are contaminated by trifluoroethanol by bringing the contaminated liquid into contact with a molecular sieve having a pore size ranging between 0.5 and 1.0 nm, e.g., with molecular sieve 13X. This enables, f... | 01/31/2006 |
| 6992210 | Fluorine-containing cyclic esters, fluorine-containing cyclic alcohols, and their production processes A fluorine-containing cyclic ester is represented by the formula 1: wherein each R1 independently represents —H or —F, wherein R2 is one selected from the group consisting of —H, —F, —CF | 01/31/2006 |
| 6956138 | Method for producing a fluorine-containing compound The present invention provides a method for obtaining a compound useful as a raw material for various fluororesins in high yield by a short process by using a starting material which is inexpensive and readily available. ... | 10/18/2005 |
| 6906219 | Method for preparing bromodifluoroacetic compounds The invention relates to a method for preparing bromodifluoroacetic compounds which comprises converting a 1,1-difluoro-1,2-dibromodihaloethane with oleum having 50-70% SO3 to a bromodifluoroacetyl halide (bromide or chloride) and then in reacting the lat... | 06/14/2005 |
| 6894187 | Method for producing a fluorine-containing compound The present invention provides a method for obtaining a compound useful as a raw material for various fluororesins in high yield by a short process by using a starting material which is inexpensive and readily available. ... | 05/17/2005 |
| 6858752 | Process for producing fluorinated polyvalent carbonyl compound A fluorinated polyvalent carbonyl compound is produced by an economically advantageous method from inexpensive materials without requiring a complicated synthetic process step. Namely, the present invention comprises reacting a polyvalent alcohol having at least two... | 02/22/2005 |
| 6858751 | Process for preparing aliphatic fluorofomates A method for the production of aliphatic fluoroformates, wherein carbonyl fluoride is made to react with aliphatic alcohol in the presence of sodium fluoride in ether at a temperature of −20° to 50° C. The method is carried out using carbonyl fluoride obtained b... | 02/22/2005 |
| 6833468 | Process for producing 4,4,4-trifluoro-3-hydroxybutyric acid derivatives A first process for producing an optically active perfluoroalklylcarbinol derivative includes (a) reacting an optically active imine with a compound that is a hemiacetal of a perfluoroalkylaldehyde or a hydrate of a perfluoroalkylaldehyde to obtain a condensate; and... | 12/21/2004 |
