- Synthesis and properties of fluorosilicon-containing polybutadienes by hydrosilylation of fluorinated hydrogenosilanes. Part 1. Preparation of the silylation agents
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The synthesis of new fluorinated hydrogenosilanes CnF(2n+1)(CH2)xC2H4Si(CH3)2H with n = 6 or 8 and x = 0 or 1 is presented.Such compounds were prepared in 85percent-90percent yield by the selective reduction of the corresponding fluorine-containing (dimethyl)chlorosilanes.These chlorinated derivatives were produced by the hydrosilylation of (dimethyl)chlorosilane with perfluoroalkylvinyl, CnF(2n+1)CH=CH2 (x = 0), or allyl, CnF(2n+1)CH2CH=CH2 (x = 1), olefins, both obtained from perfluoroalkyl iodides in two steps, the latter olefins being more reactive than the former.For all these steps, the influence of the spacer (C2H4 or C3H6) located between the fluorinated chain and the silicon atom with respect to the reactivity is discussed. - Keywords: Perfluoroalkyl iodide; Fluorinated olefin; Hydrosilylation; Reduction; Chlorofluorosilane; Polyfluoroalkyl(dimethyl)hydrogenosilanes
- Ameduri, B.,Boutevin, B.,Nouiri, M.,Talbi, M.
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- A General and Selective Synthesis of Methylmonochlorosilanes from Di-, Tri-, and Tetrachlorosilanes
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Direct catalytic transformation of chlorosilanes into organosilicon compounds remains challenging due to difficulty in cleaving the strong Si-Cl bond(s). We herein report the palladium-catalyzed cross-coupling reaction of chlorosilanes with organoaluminum reagents. A combination of [Pd(C3H5)Cl]2 and DavePhos ligand catalyzed the selective methylation of various dichlorosilanes 1, trichlorosilanes 5, and tetrachlorosilane 6 to give the corresponding monochlorosilanes.
- Naganawa, Yuki,Nakajima, Yumiko,Sakamoto, Kei
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supporting information
p. 601 - 606
(2021/01/13)
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- FLUORINE-CONTAINING SILOXANE COMPOUND, METHOD FOR PRODUCING THE SAME, COATING AGENT COMPRISING THE SAME, AND SURFACE TREATMENT METHOD FOR GLASS BASE MATERIAL
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PROBLEM TO BE SOLVED: To provide a fluorine-containing siloxane compound that can impart water repellent and antifouling properties to the surface of a base material, and allows distillation purification and can be produced conveniently, and provide a coating agent comprising the same. SOLUTION: The present invention provides a fluorine-containing siloxane compound produced by making a dihydroxy siloxane compound react with a fluoroalkyl-substituted silane compound, then a silane compound having a reactive group, and a coating agent comprising the fluorine-containing siloxane compound and a liquid medium. SELECTED DRAWING: None COPYRIGHT: (C)2017,JPOandINPIT
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Paragraph 0061-0063
(2017/09/21)
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- Synthesis and properties of a novel family of fluorous triphenylphosphine derivatives
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A novel approach to the preparation of perfluorotail-functionalized triarylphosphines using a p-silyl substituent as the branching point has been developed. This approach enabled the attachment of between three and nine perfluorotails per phosphorus atom, resulting in the production of highly fluorous tris[p-(1H,1H,2H,2H-perfluoroalkylsilyl)aryl]phosphines, P[C6H4-p-SiMe3-n(CH2 CH2CxF2x+1)n]3 (n = 1, 2, 3; x = 6, 8), containing between 50 and 67 wt % fluorine. 31P NMR studies indicate that the phosphorus atoms, and consequently the σ-donor and π-acceptor properties of these phosphines, are not influenced by the electron-withdrawing perfluoroalkyltails. The fluorous triarylphosphines are readily soluble in fluorous solvents and display fluorous phase preference in several fluorous biphasic systems. The phase partitioning of these fluorous ligands, as well as their donor properties, is discussed in relation to their potential for fluorous biphasic catalyst separation.
- Richter,De Wolf,Van Koten,Deelman
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p. 3885 - 3893
(2007/10/03)
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