CAS: 556-67-2; 2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-Tetraoxatetrasilocane

上下游产品

CAS号7732-18-5 水 | CAS号75-78-5 二甲基二氯硅烷 | CAS号541-05-9 六甲基环三硅氧烷 | CAS号87594-05-6 1-(1-Adamantyl)... | CAS号1066-42-8 二甲基硅烷二醇 | CAS号75-79-6 甲基三氯硅烷 | CAS号78-62-6 二甲基二乙氧基硅烷 | CAS号10026-04-7 四氯化硅 | CAS号107-51-7 八甲基三硅氧烷 | CAS号141-62-8 十甲基四硅氧烷 | CAS号141-63-9 十二甲基五硅氧烷 | CAS号107-52-8 十四甲基六硅氧烷 | CAS号541-01-5 十六甲基七硅氧烷 | CAS号75-76-3 四甲基硅烷 | CAS号16029-98-4 三甲基碘硅烷 | CAS号107-46-0 六甲基二硅氧烷 | CAS号541-02-6 环五聚二甲基硅氧烷 | CAS号540-97-6 十二甲基环六硅氧烷

十甲基环五硅氧烷置于四丁基三氟甲磺酸铵体系中,用 四氢呋喃 作为反应溶剂,以7%的收率获得产物八甲基环四硅氧烷
参考文献:以二氧化硅为原料的有机硅电化学合成路线评估
标题:以二氧化硅为原料的有机硅电化学合成路线评估
摘要:报道了一项关于将二氧化硅作为原料直接电化学转化为环状甲基硅氧烷的关键研究.有机硅的室温合成可以通过将支持电解质阳离子直接还原为甲基自由基物种来实现.对支持电解质的要求很高,概述了对重要中间体和条件的机械见解.
DOI:10.1002/ejoc.202201253

专利信息

专利号:US-5856402-A
优先权日:1996-12-30
标题 :Process for the synthesis of multi-modal aqueous dispersions of polysiloxanes
发明人：CRAIG DANIEL HORACE; MORGAN WAYNE FRANCIS
权利人:GEN ELECTRIC
摘要:A process for the acid-catalyzed synthesis of polysiloxane emulsions is discussed. The process comprises preheating an aqueous reaction mixture, optionally comprising polysiloxane emulsion seeds, and optionally containing a surfactant, to a temperature of up to about 110 DEG C. and adding to the aqueous reaction mixture, water, an acid catalyst surfactant, and a polysiloxane precursor to form a polysiloxane emulsion comprising essentially multi-modal, optionally multi-layered particles having desired multi-modal particle sizes in a range of from about 100 nm to about 2 microns.

专利号:EP-0850977-A3
优先权日:1996-12-26
标 题 :Process for the synthesis of mono-modal aqueous dispersions of polysiloxanes
发明人：CRAIG DANIEL HORACE
权利人:GEN ELECTRIC
摘要:A process for the synthesis of polysiloxane emulsions comprises thensteps ofn (a) preheating an aqueous reaction medium (A), optionallyncontaining one or more surfactants, to a temperature of about 30°C to aboutn110°C; and (b) semi-continuously adding to the aqueous reaction medium (A),nan aqueous reaction mixture (B) comprising a siloxane precursor, and an acidncatalyst-surfactant to form a polysiloxane emulsion comprising essentiallynmono-modal particles having a pre-determined particle size in the range ofnabout 50 nm to about 2 microns. The process yields mono modalnpolysiloxane emulsions, providing control over the particle size andndispersity.

专利号:EP-2607373-A1
优先权日:2011-12-23
标 题 :Liquid phase synthesis of self-assembling peptides to be linked to polymers or to other bioactive and/or self-assembling peptides
发明人：MOUSSA WAFA; JEANNIN LAURENT; CALLENS ROLAND; BOUSMANNE MARTIN
权利人:SOLVAY
摘要:The present invention relates to a process for preparing a peptide moiety comprising an amino acid sequence (I) n€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ R-Xaa1-Xaa5-Xaa3-Xaa6-R1€ƒ€ƒ€ƒ€ƒ€ƒ(I), nwherein R1 is selected from OH and NH 2 nand a peptide moiety comprising an amino acid sequence (II) n€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ H-Xaa1-Xaa2-Xaa3-Xaa4-Xaal-Xaa5-Xaa3-Xaa6-R1€ƒ€ƒ€ƒ€ƒ€ƒ(II), nwherein R1 is selected from OH and NH 2 nwhereby Xaa1 and Xaa3 are residues of hydrophobic amino acids and are preferably selected from the group consisting of phenylalanine, tryptophan, histidine, tyrosine, isoleucine, alanine, leucine, norleucine and valine ; and Xaa2, Xaa4, Xaa5 and Xaa6 are residues of charged amino acids and are preferably selected from the group consisting of arginine, aspartic acid, glutamic acid and lysine. The invention further relates to a process for synthesis of a polymer covalently linked with at least one peptide, wherein the peptide comprises said peptide moiety.

专利号:US-5900460-A
优先权日:1997-01-03
标题 :Process for the synthesis of structured aqueous dispersions of polysiloxanes
发明人：CRAIG DANIEL HORACE
权利人:GEN ELECTRIC
摘要:A process for the acid-catalyzed synthesis of polysiloxane emulsions is discussed. The process utilizes pre-existing polysiloxane emulsion seeds to yield polysiloxane emulsions comprising optionally multi-layered mono-modal particles.

专利号:US-5726270-A
优先权日:1996-12-26
标 题:Process for the synthesis of mono-modal aqueous dispersions of polysiloxanes
发明人：CRAIG DANIEL HORACE
权利人:GEN ELECTRIC
摘要:A process for the synthesis of polysiloxane emulsions is discussed. The process yields mono modal polysiloxane emulsions, providing control over the particle size and dispersity.

专利号:US-6528642-B1
优先权日:1997-08-29
标题:Mono-and di-derivatives of cyclodextrins, synthesis thereof and purification and use thereof in support
发明人：DUVAL RAPHAEL; LEVEQUE HUBERT
权利人:INST FRANCAIS DU PETROLE; CHIRALSEP SARL
摘要:Mono- and di-derivatives of cyclodextrins are completely defined, also a method for their synthesis and purification, functionalised cyclodextrins obtained from these derivatives, and the synthesis of supports comprising these cyclodextrin derivatives. Use of the supports for the preparation or separation of enantiomers, for asymmetric synthesis, for catalysis, for the preparation or separation of geometrical isomers or positional isomers, or for the preparation or separation of organic molecules with a hydrophobic nature is also described.