17744-86-4Relevant academic research and scientific papers
Selective Formation of Alkoxychlorosilanes and Organotrialkoxysilane with Four Different Substituents by Intermolecular Exchange Reaction
Komata, Yuma,Yoshikawa, Masashi,Tamura, Yasuhiro,Wada, Hiroaki,Shimojima, Atsushi,Kuroda, Kazuyuki
, p. 3225 - 3233 (2016)
Alkoxychlorosilanes are scientifically and industrially important toward preparing silicone and silica as well as preparation of siloxane-based nanomaterials by stepwise reactions of Si?OR (R=alkyl) and Si?Cl groups. Intermolecular exchange of alkoxy and chloro groups between alkoxysilanes and chlorosilanes (functional group exchange reaction) provides an efficient and environmentally benign route to alkoxychlorosilanes. BiCl3 as a Lewis acid catalyst can promote the functional group exchange reactions more efficiently than conventional acid catalysts. Higher reactivity has been observed for chlorosilanes with smaller numbers of Si?CH3 groups and for alkoxysilanes with larger numbers of Si?CH3 groups. The reaction mechanism is proposed and selective syntheses of alkoxychlorosilanes are demonstrated. These findings also enable us to synthesize an organotrialkoxysilane with four different substituents.
The reaction of (tert-Butoxysilyl)methylmagnesium chlorides with some organotin and organosilicon monochlorides
Bykova, Irina A.,Kisin, Alexander V.,Monin, Evgeny A.,Nosova, Valentina M.,Philippov, Alexander M.,Storozhenko, Pavel A.
, (2020/04/15)
Interaction between (tert-butoxysilyl)methylmagnesium chlorides of the general formula Me3-n(t-BuO)nSiCH2MgCl, n = 1–3, with some organotin and organosilicon monochlorides has been studied. It has been found that the reaction of the Grignard reagents with trialkyltin chlorides readily proceeds via the methylene carbon with the formation of C-substituted products Me3-n(t-BuO)nSiCH2SnR3, R = Me, n-Bu in high yields. The path of this reaction with Me3SiCl and MePh2SiCl depends on the structure of Grignard compound and chlorosilane electrophilicity. Increasing the number of the tert-butoxy groups in the Grignard reagent has unexpectedly been found to result in the formation of Me3-n(t-BuO)nSiCH2OSiMeR2, R = Me, Ph and decrease of the organosilylmethyl silicon compounds content in the reaction products. The structure of the compounds synthesized has been confirmed by 1H, 13C, 29Si, 117,119Sn NMR spectroscopy and mass spectrometry.
Compositions using evaporable silicone carriers for cosmetics, cleaning and care product compositions
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Page/Page column 6, (2008/06/13)
This invention describes cosmetic, cleaning and care products compositions made using an evaporable siloxane liquid support or carrier having the molecular formula: [in-line-formulae]MvM′wDxTyQz [/in-line-formulae] where the subscripts may have the following values: x=0, 1, 2, 3, or 4; y=0, 1, or 2; z=0, 1, 2, 3, or 4; and v and w may be zero or a positive integer subject to the limitation that v+w≧1 where the components are defined as follows: M=(R1O)a(R2O)bR3cSiO1/2 where the subscripts may have the following values: a=1, 2, or 3; b=0, 1, or 2; c=0, 1, or 2; subject to the limitation that a+b+c=3 except when w+x+y+z=0 then a+b+c=4; M′=(R1O)d(R2O)eR4fSiO1/2 where the subscripts may have the following values: d=1, 2, or 3; e=0, 1, or 2; f=0, 1, or 2; subject to the limitation that d+e+f=3; D=R5R6SiO2/2; T=R7SiO3/2; and Q=SiO4/2; where R1 and R2 are selected from the group of linear or branched monovalent hydrocarbon radicals having from one to eight carbon atoms and where each R3, R4, R5, R6, and R7 is independently selected from the group of monovalent hydrocarbon radicals having from one to sixty carbon atoms; and mixtures thereof.
Reactions of dihydrofurylsilanes with O- and N-nucleophiles
Lukevics,Gevorgyan,Borisova
, p. 161 - 163 (2007/10/03)
It was shown that the reaction of 4,5-dilydro-2-furylsilanes with alcohols and lithium N,N-diethylamide leads to substitution of the dihydrofuryl group by the nucleophilic residue. 1997 Plenum Publishing Corporation.
THE BEHAVIOR OF ALKOXIDES WITH ALLYL(CHLOROMETHYL)DIMETHYLSILANES AND (CHLOROMETHYL)DIMETHYLVINYLSILANE; THE ABILITIES OF ALLYL AND VINYL GROUPS TO MIGRATE FROM PENTACOORDINATE SILICON
Sans, E. A.,Shechter, H.
, p. 1119 - 1122 (2007/10/02)
Sodium methoxide in tetrahydrofuran attacks silicon in allyl(chloromethyl)-dimethylsilane and in (chloromethyl)dimethylvinylsilane with displacement of chloride and 1,2-migration of the allyl and the vinyl groups to give 1-(3-butenyl)methoxydimethylsilane and allylmethoxydimethylsilane.
HETEROGENEOUS REACTIONS VII. FURTHER STUDIES ON THE HETEROGENEOUS GAS/SOLID REACTIONS OF SOLID ALKOXIDE BASES WITH VAPORIZED CHLOROMETHYLDIMETHYLHALOSILANES
Hopper, Steven P.,Tremelling, Michael J.,Goldman, Emma W.
, p. 247 - 256 (2007/10/02)
The results of the heterogeneous gas/solid reactions of chloromethyldimethylchloro (and fluoro)silane with solid lithium, sodium and potassium methoxide in the temperature range from 80-160 deg C are presented and discussed.Reaction with lithium methoxide serves as a clean, efficient high yield synthesis of chloromethyldimethylmethoxysilane without the complicating factors of side products or solvent to separate.The reactions of both the sodium and potassium methoxides lead to the displacement of halogen from silicon and to the displacement of the chloromethyl group.New evidence for the mechanism of the latter reaction is presented.With the potassium compound methylethyldimethoxysilane also is formed and a carbene, sila-olefin addition mechanism is suggested.Surprisingly, lithium t-butoxide did not react with the chlorosilane but did react with the fluorosilane to produce chloromethyldimethyl-t-butoxysilane in high purity and excellent yield.The reaction with potassium t-butoxide was more complicated, giving substitution for halogen and the chloromethyl group at silicon as well as t-butyl methyl ether.
