CAS: 3115-68-2; Tetrabutylphosphonium Bromide

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2304-30-5 1813-60-1 7392-50-9

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专利信息

专利号:US-2023286918-A1
优先权日:2020-07-02
标 题:Manufacturing process for 3,5-dichloropicolinonitrile for synthesis of vadadustat
发明人：JURKAUSKAS VALDAS; JUNG YOUNG CHUN; KWON TAESOO; KANNAN ARUNACHALAM; GONDI VIJAYA BHASKER
权利人:AKEBIA THERAPEUTICS INC
摘要:Disclosed herein are methods and processes of preparing vadadustat or a pharmaceutically acceptable salts thereof, and intermediates (e.g., a compound of Formula (I), (I-F), (II), or (IV), or a pharmaceutically acceptable salts thereof) useful for the synthesis of vadadustat.

专利号:US-8637695-B2
优先权日:2011-12-30
标 题:Synthesis of organohalosilane monomers from conventionally uncleavable Direct Process Residue
发明人：LEWIS KENRICK MARTIN; NEELY JOHN DAVID
权利人:LEWIS KENRICK MARTIN; NEELY JOHN DAVID; MOMENTIVE PERFORMANCE MAT INC
摘要:Disclosed herein is a catalytic process for the synthesis of organohalosilane monomers from tetraorganodihalodisilanes and other compounds that are not cleaved during the conventional hydrochlorination of Direct Process Residue. The process is characterized by the use of a catalyst containing (1) one or more heterocyclic amines and/or one or more heterocyclic ammonium halides, and (2) one or more quaternary Group 15 onium compounds.

专利号:US-6156922-A
优先权日:1995-12-28
标题 :Method for the synthesis of an aromatic derivative ortho-disubstituted by a halogen atom other than fluorine and by a cyano group
发明人：RUSSELL JAMES; GILBERT LAURENT; MAESTRO JEAN PIERRE
权利人:RHODIA CHIMIE SA
摘要:PCT No. PCT/FR96/02100 Sec. 371 Date Sep. 15, 1998 Sec. 102(e) Date Sep. 15, 1998 PCT Filed Dec. 27, 1996 PCT Pub. No. WO97/24318 PCT Pub. Date Jul. 10, 1997The present invention relates to a method for the synthesis of a halogen substituted aryl nitrile, where the halogens are selected from Cl, Br, or I, by reacting an aryl dihalide with a halogen/fluoride exchange reactant to produce a halogen substituted aryl fluoride which is then reacted with a fluoride/cyanide exchange reactant to produce the halogen substituted aryl nitrile.

专利号:US-2023192731-A1
优先权日:2020-05-29
标 题 :Process for the stepwise synthesis of silahydrocarbons
发明人：AUNER NORBERT; STURM ALEXANDER G; SANTOWSKI TOBIAS; FELDER THORSTEN
权利人:MOMENTIVE PERFORMANCE MAT INC
摘要:The invention relates to a process for the stepwise synthesis of silahydrocarbons bearing up to four different organyl substituents at the silicon atom, wherein the process includes at least one step a) of producing a bifunctional hydridochlorosilane by a redistribution reaction, selective chlorination of hydridosilanes with an ether/HCl reagent, or by selective chlorination of hydridosilanes with SiCl 4 , at least one step b) of submitting a bifunctional hydridochloromonosilane to a hydrosilylation reaction, at least one step c) of hydrogenation of a chloromonosilane, and a step d) in which a silahydrocarbon compound is obtained in a hydrosilylation reaction.

专利号:US-5756789-A
优先权日:1995-06-08
标题 :Synthesis of metal--containing aluminophosphates with layered structure
发明人：BRUCE DAVID ALAN; WHITE MARK GILMORE; BERTRAND JOSEPH AARON; DAI PEI-SHING EUGENE; PETTY RANDALL HUGHES
权利人:TEXACO INC
摘要:Disclosed is a novel process for the synthesis of a metal-containing aluminophosphate having a layered structure and novel optically active metal-containing aluminophosphates useful as enantio-selective catalysts, which comprises: a) slurring an aluminum source with water; b) adding a phosphorus source and slurring; c) allowing the mixture to stand; d) adding an organic additive; e) allowing the mixture to stand; f) adding a cationic transition metal complex g) heating to 80 DEG -250 DEG C. for 20-180 hours wherein the mole ratio of transition metal complex to organic additive is in the range of 0.1-1.0:1.0.

专利号:US-6864374-B2
优先权日:2000-10-10
标题 :Synthesis of r(+)α-lipoic acid
发明人：VILLANI FLAVIO; NARDI ANTONIO; SALVI ANNIBALE; FALABELLA GIOVANNA
权利人:LABORATORIO CHIMICO INT SPA
摘要:Process for the synthesis of R(+)α-lipoic acid comprising the following stages: a) Salifying of racemic 6,8-halo-octanoic acid with S(−)α-methylbenzylamine; b) separation by filtration of the crystallized diastereoisomeric salt of R(+)6,8-di-halo-octanoic acid-S(−)α-methylbenzylamine; c) purification by re-crystallization of the diastereoisomeric salt of R(+)6,8-di-halo-octanoic acid-S(−)α-methylbenzylamine; (d) separation of the diastereoisomeric salt to obtain R(+)6,8-di-halo-octanoic acid by reation of said salt with strong mineral acids in an aqueous solution with a dilution between 2 and 10% by weight; e) esterification of R(+)6,8-di-halo-octanoic acid to obtain the corresponding alkyl ester; f) reaction of the alkyl ester of R(+)6,8-di-halo-octanoic acid in an organic solvent with an aqueous solution of alkali disulfide in presence of a compound for phase transfer catalysis; g) hydolysis of the ester of R(+)α-lipoic acid.