6990-64-3Relevant articles and documents
A new and efficient method for the synthesis of bromosilanes from hydrosilanes using Br3CCOOEt/PdCl2 as the catalyst
Srithanakit, Phatsupha,Chavasiri, Warinthorn
experimental part, p. 2505 - 2507 (2011/05/09)
Bromosilanes were prepared conveniently and efficiently via the reaction of hydrosilanes and Br3CCOOEt in the presence of a catalytic amount of PdCl2 in refluxing THF over 15 min in high yields. The developed methodology was further applied for the one-pot synthesis of silyl ethers and silyl esters in excellent yields.
Remote functionalization by tandem radical chain reactions
Wiedenfeld, David
, p. 339 - 347 (2007/10/03)
Normal radical relay chlorination of cholestan-3α-ol directed by an attached m-iodobenzoate ester group affords a 9α-chloro steroid, but when the same reaction is conducted in the presence of an excess of CBr4 the product is a 9α-bromo steroid. Similarly, when the same radical relay reaction is carried out in the presence of an excess of (SCN)2 rather than CBr4, the product is a 9α-thiocyano steroid. Several other examples of these reactions have been developed. These tandem remote functionalization reactions succeed because an intramolecular hydrogen abstraction by a complexed-chlorine atom generates a specific substrate radical in each case. Copyright 1997 by the Royal Society Chemistry.
The reaction of isosteric isobutyl(isopropoxy)silanes iBun(iPrO)3-nSiH (n = 0-3) with allyl bromide in the presence of platinum compounds
Pikies, J.,Wojnowski, W.
, p. 187 - 193 (2007/10/02)
The isosteric silanes iBun(iPrO)3-nSiH react with allyl bromide to yield the corresponding bromides iBun(iPrO)3-nSiBr.The reactivities of the silanes fall in the sequence: iBu(iPrO)2SiH iBu2(iPrO)SiH > (iPrO)3SiH > iBu3SiH which can be accounted for in terms of the anomeric effects at the silicon atom.
THERMOLYSE VON (α-BROM-α-METHOXYMETHYL)SILANEN
Schubert, U.,Steib, Ch.,Weiss, K.
, p. C1 - C4 (2007/10/02)
When heated to 110 deg C, Ph3Si-CBr2OMe (2) decomposes quantitatively to Ph3SiBr, CO and MeBr.Formation of the intermediate bromo(methoxy)carbene is assumed.In contrast, thermolysis of Ph3Si-CHBrOMe (1) at 150 deg C, yields a mixture of products, the main component being Ph2(MeO)Si-CHBrPh (3).
The Mechanism of the Reaction of Molecular Bromine with Organosilicon Hydrides
El-Durini, Nabil M. K.,Jackson, Richard A.
, p. 1275 - 1278 (2007/10/02)
The kinetics of the bromination of 7 triarylsilanes and 14 other organosilicon hydrides by molecular bromine in CCl4 have been determined by the stopped flow method.For triethylsilane, Arrhenius parameters have been measured in octane and CCl4, and solvent effects determined in other solvents of different polarity.The results accord with a molecular mechanism involving one molecule of bromine and one of the organosilicon hydride, with partial positive charge build-up on silicon in the transition state.
The Influence of Substituents on the Nucleophilic Cleavage of the SiSi Linkage in Disilane Derivatives
Hengge, Edwin,Krysl, Franz Josef
, p. 731 - 742 (2007/10/02)
The rate constants of the SiSi cleavage with elementary bromine were measured in phenylmethyl- and pF-phenyl-methyldisilane derivatives.The influence of the substituents on the cleavage is discussed. - Keywords: Disilanederivatives; Rate constants, influence of substituents; SiSi-linkage
