CAS: 1111-74-6; Dimethylsilicon

上下游产品

trimethylsilan chloro-methyl-silane dimethyl zinc(II) dimethylsilicon dichloride1,1,2-Trimethyl-disilan Isobutane dimethylsilanylium 1,1,2,2-tetramethyldisilane

📜1,1,3,3-四甲基二硅氧烷置于sodium T-Butanolate体系中,用 氘代四氢呋喃 用作溶剂,化学反应 24.0H,反应生成二甲基硅烷
参考文献:亲核试剂引起的烷氧基硅烷和芳基硅烷的配体重排反应
标题:亲核试剂引起的烷氧基硅烷和芳基硅烷的配体重排反应
摘要:芳基和烷氧基-氢硅烷的配体-再分布反应可能会导致形成易燃易燃的气态氢硅烷.研究了通用亲核试剂引发常用氢硅烷试剂的配体-再分布反应的能力,以及阻止和阻止有害氢硅烷形成的方法.我们的结果表明,普通的亲电子试剂和第一行过渡金属预催化剂可以完全抑制配体的再分布反应.
Doi:10.1016/j.Tet.2019.04.062

专利信息

专利号:US-7652164-B2
优先权日:2005-09-13
标题:Process for the direct synthesis of trialkoxysilane
发明人：LEWIS KENRICK M; MEREIGH ABELLARD T; O'YOUNG CHI-LIN; CAMERON RUDOLPH A
权利人:MOMENTIVE PERFORMANCE MAT INC
摘要:The Direct Synthesis of trialkoxysilane is carried out by conducting the Direct Synthesis reaction of silicon and alcohol, optionally in solvent, in the presence of a catalytically effective amount of Direct Synthesis catalyst and an effective catalyst-promoting amount of Direct Synthesis catalyst promoter, said promoter being an organic or inorganic compound possessing at least one phosphorus-oxygen bond.

专利号:US-2024309024-A1
优先权日:2023-03-14
标题 :Direct synthesis of alkenylhalosilanes
发明人：LEWIS KENRICK MARTIN; ZHU YANJUN; BYRNE CHRISTOPHER M
权利人:MOMENTIVE PERFORMANCE MAT INC
摘要:A process for the direct synthesis of alkenylhalosilane monomers. Forming a slurry of liquid and copper-activated silicon from fresh silicon, cyclone fines and/or fine dust from silicon grinding, ultrafines and/or spent contact mass from the Direct Synthesis of alkylhalosilanes and arylhalosilanes, in a thermally stable solvent. Reacting the silanes by agitating the slurry with at least one unsaturated aliphatic or cycloaliphatic organohalide of the formula R1X, and optionally an organohalosilane and/or hydrogen halide, in the presence of a polymerization inhibiting Lewis base additive, at a reaction time, temperature and pressure effective to produce alkenylhalosilanes having the formulae, R1SiHX2, R12SiHX, R13SiX, R1SiX3, and R12SiX2 or mixtures thereof.

专利号:US-7429672-B2
优先权日:2006-06-09
标题 :Process for the direct synthesis of trialkoxysilane
发明人：LEWIS KENRICK M; CAMERON RUDOLPH A; RITSCHER LEGAL REPRESENTATIVE KAREN
权利人:MOMENTIVE PERFORMANCE MAT INC
摘要:This invention discloses a process to improve reaction stability in the Direct Synthesis of trialkoxysilanes. The process is particularly effective in the Direct Synthesis of triethoxysilane and its higher alkyl cognates providing improved triethoxysilane yields.

专利号:WO-2013008044-A1
优先权日:2011-07-08
标题:Synthesis of (+) and (-) 1 -(5,5-diphenyltetrahydrofuran-3- yl)-n,n-dimethylmethanamine, (+) and (-) 1-(2,2-diphenyltetrahydrofuran-3-yl)-n,n- dimethylmethanamine and (+) and (-) 1-(2,2- dffhenyltetrahydrofuran-3-yl)-n-metihylmethanamine
发明人：WAMVAKIDES ALEXANDRE; MOUTSOS VASSILIOS; SCHMITT MARTINE
权利人:ANAVEX LIFE SCIENCES CORP; WAMVAKIDES ALEXANDRE; MOUTSOS VASSILIOS; SCHMITT MARTINE
摘要:The current invention covers the synthesis of (+) and (-) l-(5,5-diphenyItetrahydrofuran-3- yl)-N,N-dimethylmethanamine [(±)1] and [(-)1] respectively, including their pharmacologically acceptable acid addition salts. The new products can be synthesized starting from 5,5-diphenyltetrahydrofuran-2(3H)-one (4) after insertion of an aldehyde group in the α-position, reduction to the prochiral 3-(hydroxymethyl)-1, 1-diphenylbutane-1,4-diol (6), chemoenzymatic desymmetrization using the enzyme Amano Lipase PS30, tosylation, intramolecular nucleophilic attack, hydrolysis, reaction with trifluoromethanesulfonic anhydride and substitution by dimethylamine, thus producing (+) 1-(5,5-diphenyl- tetrahydrofuran-3-yl)-N,N-dimethylmethanamine [(+)1]. Protection of the product of the chemoenzymatic desymmetrization with tert-butyldimethylsilyl chloride, hydrolysis, tosylation, intramolecular nucleophilic attack, removal of tert-butyldimethylsilyl group, reaction with trifluoromethanesulfonic anhydride and substitution by dimethylamine produces (-) 1-(5,5-diphenyltetrahydrofuran-3-yl)-N,N-dimethylmethanamine [(-)1]. It also covers the synthesis of (+) and (-) 1-(2,2-diphenyltetrahydrofuran-3-yl)-N,N- dimethylmethanamine [(+)2] and [(-)2] respectively and (+) and (-) 1-(2,2-diphenyl- tetrahydrofuran-3-yl)-N-methylmethanamine \\(+)3] and [(-)3] respectively, including their pharmacologically acceptable acid addition salts. The new products can be synthesized either starting from the reduction of 5-oxo-2,2-diphenyltetrahydrofuran-3-carboxylic acid (13) with LiA1H 4 , followed by the cyclization of the obtained triol (14) under acidic conditions, reaction with 1S-(-) or1R-(+)camphanic chloride, recrystallization, hydrolysis, reaction with trifluoromethanesulfonic anhydride and substitution by dimethylamine or methylamine, or by the reaction of R-(-) or S-(+) Mandelic acid and acetic acid with racemic 1-(2,2-diphenyltetrahydrofuran-3-yl)-N,N-dimethylmethanamine (2), recrystallization, followed by reaction with an aqueous solution of NaOH. The compounds mentioned in the invention present neuroprotective, antiepileptic and antidepressant activity and can be used as therapeutic agents.

专利号:US-4354972-A
优先权日:1981-06-29
标 题 :Synthesis of steroids
发明人：KAISER EMIL T
权利人:KAISER EMIL T
摘要:This invention relates to the synthesis of steroids which are useful for their biological activity or which may be converted to steroids which have such activity. These syntheses include the steroid compounds and processes for their preparation. n An object of the invention is to provide syntheses which are applicable to materials which are readily available in good supply for converting such materials to steroids which are useful and desirable in the manufacture of pharmaceutical products. n More particularly, I have sought to discover processes and intermediate compounds useful in the synthesis of 24, 25-dihydroxycholesterol from hyodeoxycholic acid or lithocholic acid which are constituents of, and readily available from, animal bile.

专利号:US-RE39650-E
优先权日:1996-10-10
标 题:Surface-active additives in the direct synthesis of trialkoxysilanes
发明人：MENDICINO FRANK D; LEWIS KENRICK M; MAGRI SEBASTIANO; YU HUA; CHILDRESS THOMAS E
权利人:GEN ELECTRIC
摘要:Disclosed is a process in which surface-active additives are used in the slurry phase Direct Synthesis of trialkoxysilanes to shorten the period between the start of the reaction and the attainment of steady-state rates and selectivities, to improve product yields and to control or prevent foam formation. Compositions comprising silicone antifoam compounds and fluorosilicone polymers are the preferred surface-active additives of the instant process.