CAS: 149-32-6; (2R,3S)-Rel-Butane-1,2,3,4-Tetraol

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149-32-6 13171-64-7 133-37-9

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专利信息

专利号:US-11583924-B2
优先权日:2018-12-31
标 题 :Synthesis of nano particles
发明人：DAWARE SANTOSH VASANT; RAI BEENA
权利人:TATA CONSULTANCY SERVICES LTD
摘要:A method for synthesis of nanoparticles are described. The method includes dispersing metal oxide powder in a mixture of a base liquid and a surfactant to form a primary mixture, grinding the primary mixture using a grinding media by periodically adding a surfactant solution to form a slurry, extracting a predetermined amount of sample from the slurry at periodic time intervals to obtain a testing solution to assess particle size of in the slurry using a particle size analyzer; and systematically adding the surfactant solution and the grinding media to the slurry based on the assessed particle size in the testing solution until a mean particle size of the nanoparticles is achieved.

专利号:US-5886190-A
优先权日:1993-10-04
标 题:Rapid synthesis and use of 18F-fluoromisonidazole and analogs
发明人：WALLACE SIDNEY; YANG DAVID J; CHERIF ABDALLAH
摘要:The present invention involves a rapid synthesis of 18F-FMISO and analogs thereof. New precursors such as 1-(2'-nitro-1'-imidazolyl)-2-0-acetyl-3-0-tosylpropanol, glycerol-1,3-ditosylate-2-0-acetylate, 1-(2'-nitro-1'-imidazolyl)-2,3-0-diacetyl-4-0-tosylbutanol and threitol 1,4-di-tosylate-2,3-0-diacetylate, are also important aspects of the invention. A further aspect of the invention is the development of a hydrophilic PET ligand to image tumor hypoxia. Erythrotosyl analogue of 2-nitroimidazone (Ts-ETNIM) was prepared from a mixture of 2-nitromidazole, ditosylthreitol and cesium carbonate at 60 DEG C. for 1 hr. Ts-ETNIM was isolated at 70% yield. [18F]fluoroerythronitroimidazole (FETNIM) was then prepared from Ts-ETNIM and K18F/kryptofix TM . The yield for [18F]FETNIM was 26-30% (60 min, decay corrected). Results of biodistribution and PET studies indicate that [18F]FETNIM has the potential to detect tumor hypoxia and is indicated to be less neurotoxic.

专利号:EP-1615963-B1
优先权日:2003-04-16
标题:Method for the continuous synthesis of a liquid melamine resin
发明人：RAETZSCH MANFRED; BUCKA HARTMUT; SCHROEDER FRANK; PFEIFFER STEFFEN; TAPPEINER GUENTHER
权利人:AMI AGROLINZ MELAMINE INT GMBH
摘要:The invention relates to a method for synthesizing a liquid melamine resin, wherein: a) melamine, at least one aldehyde and at least one alcohol are fed to at least one first reactor operated continuously, in particular at least one agitated tank operated continuously and are reacted together, b) the reaction product that is obtained is fed to a solid-liquid phase separation device, c) a solids-rich phase that has been produced in the solid-liquid phase separation is fed back to at least one first reactor, and d) a phase devoid of solids that has been produced in the solid-liquid phase separation is subjected to additional processing steps. The invention thus provides an efficient continuous direct synthesis method for a liquid melamine resin.

专利号:US-6177409-B1
优先权日:1996-07-05
标 题 :Method for the site specific synthesis of novel 3-hydroxypyridin-4(1H)ons derivatives from aminomonosaccharides or aminoitols, products obtained by this method and their applications
发明人：VANLEMMENS PIERRE PAUL; POSTEL DENIS GHISLAIN; GERMAIN PIERIG EMMANUEL; JULIEN RENE JEAN-MARIE; PETIT JEAN-PIERRE CONSTANT; RONCO GINO LINO; VILLA PIERRE JOSEPH
权利人:INST BIOCHIMICO PAVESE PHARMA
摘要:Process for regiospecific preparation of new 3-hydroxypyridine-4(1H)-one derivatives starting from monosaccharides or itols of general formula:in which R represents a radical, either saturated or not, branched or not, having carbon-atom groups, and having hetero-atoms or not, and Sub represents a saccharide derivative or an itol, either cyclic not, protected or not, the hydrocarbon skeleton of which is bound to the nitrogen atom of the pyridinone either directly or by the intermediary of a spacing group. The present invention is characterized in that the process comprises a first step of protection of the 3-hydroxy group of the pyranone derivative, a second basocatalyzed step of substitution of the intracyclic oxygen atom of the pyranone by the nitrogen atom of the amine function of the amino monosaccharide or amino itol, and a third step of de-protection of the 3-OH group of the pyridinone cycle and possibly of the OH groups of the glucide or itol residue. It also regards the products obtained by this process, as well as their applications, namely as medicaments for the treatment of toxic overloads of FeIII.

专利号:US-2017204442-A1
优先权日:2014-05-29
标题 :Enzymatic synthesis of soluble glucan fiber
发明人：DICOSIMO ROBERT; CHENG QIONG; ELIOT ANDREW C; OUWEHAND ARTHUR; PAYNE MARK S; YOU ZHENG
权利人:DU PONT
摘要:An enzymatically produced soluble α-glucan fiber composition is provided suitable for use as a digestion resistant fiber in food and feed applications. The soluble α-glucan fiber composition can be blended with one or more additional food ingredients to produce fiber-containing compositions. Methods for the production and use of compositions comprising the soluble α-glucan fiber are also provided.

专利号:US-10450421-B2
优先权日:2015-02-16
标题:Synthesis of multiarm poly[(R)-3-hydroxybutyrate] and its derivatives
发明人：LOH XIAN JUN; LIOW SING SHY
权利人:AGENCY SCIENCE TECH & RES
摘要:Provided herein is a polymer having formula I: n nwhere m, n, and R 1 are as defined herein, and the polymer has a number average molecular weight of the polymer of from 500 to 80,000 Daltons. Also provided herein are block copolymers of the polymer of formula I, as well as processes to make the polymer and block copolymers thereof.