- Method for preparing thexyldimethylchlorosilane
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The invention discloses a method for preparing thexyldimethylchlorosilane, wherein the method comprises the following steps: adding a Lewis acid catalyst in trimethylchlorosilane, dropwise adding 2,3-dimethyl butene at the temperature of -10-0 DEG C while stirring, carrying out a reaction, and thus obtaining thexyldimethylchlorosilane. The method has the advantages that the production process is greatly simplified, the reaction conditions are mild, the production cost is relatively low, and the product yield is relatively high.
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Paragraph 0020; 0021
(2016/11/07)
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- Iron-catalyzed chlorination of silanes
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A simple and highly efficient iron-catalyzed method for the chlorination of silanes has been developed. By use of 0.5-2% of the Fe(III)-based catalyst FeCl3 or Fe(acac)3 in the presence of 1-1.5 equiv of acetyl chloride as the chlorine donor, a large number of silanes, alkoxysilanes, and silanols were converted to the corresponding chlorosilanes in 50-93% yields. In contrast to earlier reported methods often suffering from expensive catalysts or use of stoichiometric metal salts, hazardous reagents, and reaction conditions, the presently described methodology allows benign reaction conditions and simple workup while using only catalytic amounts of a readily available and economically viable iron catalyst.
- Savela, Risto,Zawartka, Wojciech,Leino, Reko
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experimental part
p. 3199 - 3206
(2012/06/04)
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- The recycling of organosilyl protecting species used in organic synthesis and the water binding ability of the silanol tBuMe2SiOH
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The silanols formed on the cleavage of organosilyl protecting groups from organic compounds can be efficiently reconverted into the chlorosilanes used in the initial silylation reaction by treatment with SOCl2.The silanol tBuMe2SiOH is very readily removed from organic reaction mixtures as its remarkably volatile hemihydrate tBuMe2SiOH>2 * H2O.
- Lickiss, Paul D.,Stubbs, Katharine M.
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p. 171 - 174
(2007/10/02)
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- Silanes, process for their preparation, and their use
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Compounds of the formula Ia STR1 in which X and R1 to R6 are as defined in the claims, are obtainable by reacting monochlorosilanes of the formula II STR2 with tetrasubstituted ethylenes of the formula III STR3 X as Cl and Br can be replaced by ester groups of inorganic and organic acids. The compounds of the formula I and those with other ester groups are suitable especially as a protective-group reagent for hydroxyl, mercapto, carboxyl, amino and amide groups.
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- HYDROSILYLATION OF TETRASUBSTITUTED OLEFINS
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Tetrasubstituted olefins are hydrosilylated under very mild conditions with dimethyl- or butylmethylchlorosilane and aluminium chloride as catalyst.Application of this procedure to 2,3-dimethyl-2-butene yields thexyldimethylsilyl chloride, a new silicon based protective group reagent.
- Oertle, Konrad,Wetter, Hansjuerg
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p. 5511 - 5514
(2007/10/02)
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- HEXAMETHYLSILIRANE. II. RING-OPENING REACTIONS WITH SOME SIMPLE REAGENTS
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Ring-opening reactions formally of the type occur on reaction of hexamethylsilirane with water, alcohols, ammonia, amines, HCl and carboxylic acids and germanium and tin hydrides.More complicated ring opening reactions are observed with halogens, tetrahalomethanes and molecular oxygen.The oxidation and protolysis (H2O, ROH, HCl, RCO2H, NH3, amines) reactions of hexamethylsilirane are exothermic at room temperature.
- Seyferth, Dietmar,Annarelli, Dennis C.,Shannon, Mark L.,Escudie, Jean,Duncan, Don P.
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p. 177 - 192
(2007/10/02)
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