专利号:US-5973095-A 优先权日:1997-04-21 标题 :Synthesis of hydrogensilsesquioxane and organohydridosiloxane resins 发明人:HACKER NIGEL P; KRAJEWSKI TODD; LEFFERTS SCOTT 权利人:ALLIED SIGNAL INC 摘要:Novel processes for preparing hydridosiloxane and organohydridosiloxane resins are disclosed. The processes of the invention broadly provide for the steps of contacting a silane monomer with a solid state catalyst in the presence of a reaction mixture that includes a nonpolar, e.g., hydrocarbon, solvent, and a polar solvent, e.g., alcohol and water. The process is conducted under conditions effective to catalytically convert said silane monomer into hydridosiloxanes and organohydridosiloxanes. Recovery of the products is advantageously aided by the ease of separating the solid state catalyst from the reaction mixture. Hydridosiloxanes and organohydridosiloxanes resins produced by the processes of the invention are also provided.
专利号:US-2005003215-A1 优先权日:2000-02-16 标题:Synthesis of siloxane resins 发明人:HACKER NIGEL; FIGGE LISA; LEFFERTS SCOTT 摘要:Novel processes for preparing hydridosiloxane and organohydridosiloxane resins are disclosed. The processes of the invention broadly provide for the steps of contacting a silane monomer with a phase transfer catalyst in the presence of a reaction mixture that includes a nonpolar, e.g., hydrocarbon, solvent, and a polar solvent, e.g., alcohol and water. The process is conducted under conditions effective to catalytically convert said silane monomer into hydridosiloxane and organohydridosiloxane resins. Recovery of the products is advantageously aided by the ease of separating the phase transfer catalyst from the dual phase reaction mixture by separating the immiscible polar solvent carrying the catalyst from the nonpolar solvent that carries the product. Hydridosiloxane and organohydridosiloxane resins produced by the processes of the invention are also provided.
专利号:US-4777278-A 优先权日:1987-10-08 标题 :Synthesis of alkyl cycloalkyl dialkoxysilanes 发明人:BAND ELLIOT I; EBERHART SUZANNE T 权利人:AKZO AMERICA INC 摘要:Alkyl cycloalkyl dialkoxysilanes (e.g., methyl cyclohexyl dimethoxysilane) can be prepared by reaction of an alkyl trialkoxysilane (e.g., methyl trimethoxysilane) with a Grignard reagent containing the cycloalkyl moiety derived in the final end-product (e.g., a reagent formed by reacting cyclohexyl chloride and magnesium metal). The reaction is run in the absence of ether solvent, the Grignard reagent is preferably formed in situ by the reaction of magnesium metal and cyclohexyl halide, and agitation is used to promote the reaction. Advantageously, a catalyst, such as iodine, is used to promote the reaction.
专利号:US-4143050-A 优先权日:1977-01-05 标题 :Manufacture of 3-halosulfonylthiophene-carboxylic acid compounds 发明人:ROSSY PHILLIP A; HOFFMANN WERNER; MUELLER NORBERT 权利人:BASF AG 摘要:3-Halosulfonylthiophene-carboxylic acid compounds are manufactured by reacting 3-ketothiophane-carboxylic acid compounds with sulfonic acid compounds, reacting the end product from the 1st reaction stage with alkali metal polysulfides, reacting the end product from the 2nd stage with a dehydrogenating agent and finally reacting the end product from the 3rd stage with halogen and water. The products are starting compounds for the manufacture of drugs, dyes and crop protection agents and have an anti-inflammatory, analgesic and anti-rheumatic action. In particular, the end products I are starting materials for the manufacture of sweeteners which are non-toxic and free from an after-taste, flavor-improving agents, diabetic aids and feedstuffs, and provide the means of a simple and economical synthesis of thiophene-saccharins.
专利号:US-6743856-B1 优先权日:1997-04-21 标 题:Synthesis of siloxane resins 发明人:HACKER NIGEL P; FIGGE LISA K; LEFFERTS SCOTT 权利人:HONEYWELL INT INC 摘要:Novel processes for preparing hydridosiloxane and organohydridosiloxane resins are disclosed. The processes of the invention broadly provide for the steps of contacting a silane monomer with a phase transfer catalyst in the presence of a reaction mixture that includes a nonpolar, e.g., hydrocarbon, solvent, and a polar solvent, e.g., alcohol and water. The process is conducted under conditions effective to catalytically convert said silane monomer into hydridosiloxane and organohydridosiloxane resins. Recovery of the products is advantageously aided by the ease of separating the phase transfer catalyst from the dual phase reaction mixture by separating the immiscible polar solvent carrying the catalyst from the nonpolar solvent, that carries the product. Hydridosiloxane and organohydridosiloxane resins produced by the processes of the invention are also provided.
专利号:US-5068372-A 优先权日:1990-07-16 标 题:Method for the synthesis of primary arsines 发明人:KANJOLIA RAVINDRA K; HUI BENJAMIN C 权利人:CVD INC 摘要:Disclosed is a method for producing, from an aqueous basic composition, a primary arsine having one hydrocarbyl group bonded directly to As, the basic composition having been obtained from the combination of components comprising an alkali metal arsenite and a reactive hydrocarbyl halide by combining the aqueous composition with an acidic, nascent hydrogen-generating reducing agent to produce the primary arsine directly from the aqueous composition without isolation of the primary arsonic acid intermediate.
摘要:Amatore, M.; Aubert, C.; Malacria, M.; Petit, M., Science of Synthesis Knowledge Updates, (2012) 3, 64. 摘要:Alonso, D. A.; Nájera, C., Science of Synthesis, (2010) 47, 468. 摘要:Chciuk, T. V.; Flowers, R. A.; Flowers, R. A., Science of Synthesis Knowledge Updates, (2016) 2, 226. 摘要:Amatore, M.; Aubert, C.; Malacria, M.; Petit, M., Science of Synthesis Knowledge Updates, (2012) 3, 57. 摘要:Sumida, Y.; Ohmiya, H., Science of Synthesis Knowledge Updates, (2022) 3, 38.