Results 321 to 330 of about 112,449 (386)

Tetrakis(trimethylsilyl)tetrahedrane

Journal of the American Chemical Society, 2002
Tetrakis(trimethylsilyl)tetrahedrane 3 has been synthesized upon irradiation of tetrakis(trimethylsilyl)cyclobutadiene 8, which can be prepared either by thermal nitrogen elimination from trimethylsilyl[1,2,3-tris(trimethylsilyl)-2-cycloprop-1-enyl]diazomethane 7 or by mild oxidation of cyclobutadiene dianion 9 with 1,2-dibromoethane.
Jörg Neudert, Masanobu Tanaka, Dirk Pappusch, Oliver T. Wolf, Günther Maier, Tsukasa Matsuo, Akira Sekiguchi   +6 more
openaire   +3 more sources

Nickel-catalyzed decarbonylative alkylidenation of phthalimides with trimethylsilyl-substituted alkynes.

Journal of the American Chemical Society, 2013
We have developed a nickel-catalyzed transformation, in which phthalimides react with trimethylsilyl-substituted alkynes in the presence of Ni(0)/PMe3/MAD catalyst to provide isoindolinones.
Takahiro Shiba, T. Kurahashi, S. Matsubara   +2 more
semanticscholar   +1 more source

Lithiation of tris(trimethylsilyl)methane and tetrakis-(trimethylsilyl)methane

Journal of Organometallic Chemistry, 1973
Abstract Lithiation of (Me 3 Si) 3 CH by methyllithium (ether-THF) yields (Me 3 Si) 3 CLi and by t-butyllithium (C 5 H 12 -TMEDA) yields (Me 3 Si) 2 CHSiMe 2 CH 2 Li. Only starting material is recovered when (Me 3 Si) 3 CH is allowed to react with n-butyl- lithium (ether-THF and C 5 H 12 -TMEDA) and t-butyllithium (C 5 H 12 and C 5 H 12 - THF).
Omar W. Steward, James S. Johnson
openaire   +2 more sources

β-Trimethylsilyl Cyclopropylcarbenes

The Journal of Organic Chemistry, 2001
Thermal decomposition of the in situ generated lithium salt of the tosylhydrazone derivative of cyclopropyl trimethylsilylmethyl ketone gave 1-cyclopropyl-1-trimethylsilylethylene, a product of exclusive silyl migration. Thermal decomposition of the sodium salts of tosylhydrazone derivatives of 1-trimethylsilylcyclopropyl alkyl ketones also gave ...
Mark A. Butchko, Xavier Creary
openaire   +3 more sources

Formation of partially trimethylsilylated derivatives of carbohydrates. The trimethylsilyl tris-o-trimethylsilyl-d-glucopyranosides and tetrakis-o-trimethylsilyl-d-glucose

Carbohydrate Research, 1967
When mixtures of the α and β anomers of benzyl d-glucopyranoside, and of 2-, 3-, 4-, and 6-O-benzyl-d-glucose were treated with hexamethyldisilazane, the tetrakis-O-trimethylsilyl derivatives of the benzyl glycosides and the tris-O-trimethylsilyl ethers of the trimethylsilyl glycosides were obtained (anomeric mixtures).
Charles C. Sweeley, Ronald Bentley, Sung Man Kim   +2 more
openaire   +2 more sources

Trimethylsilyl-terminated oligo(phenylene ethynylene)s: an approach to single-molecule junctions with covalent Au-C σ-bonds.

Journal of the American Chemical Society, 2012
A new and efficient approach using cleaving of trimethylsilyl groups to create covalent Au-C anchoring sites has been developed for single-molecule junction conductance measurements. Employing the mechanically controllable break junction (MCBJ) technique
Wenjing Hong, Hui Li, Shi‐Xia Liu, Yongchun Fu, Jian-feng Li, Veerabhadrarao Kaliginedi, S. Decurtins, T. Wandlowski   +7 more
semanticscholar   +1 more source

Difluoro(trimethylsilyl)acetonitrile: synthesis and fluoroalkylation reactions.

Journal of Organic Chemistry, 2012
A new silicon reagent, difluoro(trimethylsilyl)acetonitrile, was prepared by insertion of difluorocarbene into silyl cyanide. The obtained silane served as a good cyanodifluoromethylating reagent toward aldehydes, N-tosylimines, N-alkylimines, and ...
M. Kosobokov, A. Dilman, V. Levin, M. Struchkova   +3 more
semanticscholar   +1 more source

Tris(trimethylsilyl)methyldichlorphosphin

Zeitschrift für Chemie, 1980
AbstractIm Zusammenhang mit Untersuchungen über die Bildungsmöglichkeiten acyclischer Derivate des dreibindigen Phosphors der Koordinationszahl 2 wird das Titelphosphin (III) aus (I) über (II) dargestellt und auf seine Reaktivität untersucht.
Harry Schmidt, Christine Wirkner, Kurt Issleib   +2 more
openaire   +3 more sources

Efficient synthesis of cyanohydrin trimethylsilyl ethers via 1,2-chemoselective cyanosilylation of carbonyls

, 2013
Here we report a sustainable protocol for the cyanosilylation of carbonyl compounds 1a–g and 3a–m using trimethylsilyl cyanide and triphenylphosphine supported on polystyrene as a catalyst under solvent-free conditions.
Giacomo Strappaveccia, Daniela Lanari, D. Gelman, F. Pizzo, O. Rosati, M. Curini, L. Vaccaro   +6 more
semanticscholar   +1 more source

Synthesis of bromo-, boryl-, and stannyl-functionalized 1,2-bis(trimethylsilyl)benzenes via Diels-Alder or C-H activation reactions.

Journal of Organic Chemistry, 2012
1,2-Bis(trimethylsilyl)benzenes are key starting materials for the synthesis of benzyne precursors, Lewis acid catalysts, and certain luminophores. We have developed efficient, high-yield routes to functionalized 4-R-1,2-bis(trimethylsilyl)benzenes ...
Christian Reus, Nai‐Wei Liu, M. Bolte, H. Lerner, M. Wagner   +4 more
semanticscholar   +1 more source