2,5-Bis-trimethylsilyl substituted boroles
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چکیده
منابع مشابه
Bis-trimethylsilylcefamandole: an unusually stable trimethylsilyl-intermediate.
The preparation of crystalline bis-trimethylsilylcefamandole (7) and its utility in the preparation and purification of cefamandole are described. Although stable to solvolysis in isopropyl alcohol, 7 underwent smooth conversion to cefamandole in the presence of water, methanol, or ethanol.
متن کاملNickel-catalyzed decarbonylative alkylidenation of phthalimides with trimethylsilyl-substituted alkynes.
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. The reaction process displays an unusual mechanistic feature-decarbonylation and alkylidenation. The use of both trimethylsilyl-substiuted alkynes and MAD was found to be essential for the transformation wi...
متن کاملKristallisation und Strukturbestimmung von 2,5-Bis(trimethylsilyl)-/?-benzochinon und von 2,5-Bis(trimethylsilyl)hydrochinon-natrium-bis(dimethoxyethan), einem Polymer-Strang mit Chelat-überkappten Wasserstoffbrücken (e O»HO)Na®(DME)2 Interactions in Crystals, 62 [1, 2] Crystallization and Structure Determination of 2,5-Bis(trimethylsilyl)-/?-benzoquinone and of 2,5-Bis(trimethylsilyl)hydroquinone Sodium Bis(dimethoxyethane), a Polymer String with Chelate-Capped Hydrogen
From the electron and proton transfer equilibria network of quinones in solution a novel intermediate can be prepared by deprotonation of 2,5-bis(trimethylsilyl)hydroquinone to its monoanion using sodium metal. The sodium salt crystallizes in polymer strings connected via 0 e (H )0 hydrogen bridges, which are capped additionally by twofold dimethoxy-ethanesolvated Na® countercations. The single...
متن کاملSynthese und Dimerisierungsverhalten des l,l-Bis(trimethylsilyl)-2-(2,5-diisopropylphenyl)silens Synthesis and Dimerization Behavior of 1,1 -Bis(trimethylsilyl)-2-(2,5-diisopropylphenyl)silene
Tris(trimethylsilyl)silylmagnesium bromide, (Me^SiX^SiMgBr, reacts with 2.5-diisopropylbenzaldehyde to give 2,5-diisopropylphenyl-tris(trimethylsilyl)silylmethanol (1). With sodium hydride in THF compound 1 undergoes a rearrangement through 1,3-Si,O-trimethylsilyl mi gration affording bis(trimethylsilyl)silyl-(2,5-diisopropylphenyl)-trimethylsiloxy-methane (4). The deprotonation of 1 with orga...
متن کاملTetrakis(tetrahydrofuran-0)calcium- und -strontium-bis[bis(trimethylsilyl)- arsanid] - Vergleich der spektroskopischen Parameter sowie der Molekülstrukturen Tetrakis(tetrahydrofuran-0)calcium and Strontium Bis[bis(trimethylsilyl)- arsanide] - A Comparison of the Spectroscopic Parameters and the Molecular Structures
Calciumand strontium bis[bis(trimethylsilyl)amide] react with bis(trimethylsilyl)arsane in tetrahydrofuran to give the corresponding tetrakis(tetrahydrofuran-O) metal bis[bis(trimethylsilyl)arsanides]. The calcium derivative crystallizes in the triclinic space group P I with a = 1191.7(2), b = 1232.0(2), c = 1655.0(2) pm, a = 102.46(1)°, ß = 107.92(1)°, y = 104.66(1)° and Z = 2, the strontium d...
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ژورنال
عنوان ژورنال: Dalton Transactions
سال: 2020
ISSN: 1477-9226,1477-9234
DOI: 10.1039/d0dt00393j