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Showing 1 to 8 of 8 for “"silanolate"”.
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The development of palladium-catalyzed cross-coupling reactions of allylic silanolate salts with aromatic bromides
The palladium-catalyzed cross-coupling of allylic silanolate salts with a wide variety of aromatic bromides was developed. The coupling of sodium allyldimethylsilanolate and 2-butenyldimethylsilanolate required extensive optimization to deliver the expected products in high yields. The reaction of …
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Palladium-Catalyzed Cross-Coupling Reactions of Organosilanols: I. New Methods That Employ Alkynylsilanols and Bissilyl Reagents. II. Mechanistic Analysis of the Cross-Coupling of Aryldimethylsilanolates
… cross-coupling of aryldimethylsilanolates demonstrated that transmetalation proceeds directly from an arylpalladium(II) silanolate intermediate without external activation. Arylpalladium(II) silanolate complexes bearing phosphine ligands were isolated and characterized. These …
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Palladium catalyzed cross-coupling reactions of allyl- and vinylsilanes
… cross-coupling of γ-substituted allylic silanolates with aryl bromides was investigated. It was discovered that γ-selectivity is heavily influenced by the substituents at silicon. It is proposed that undergoing an activated pathway significantly lowers the selectivity of the reaction. A …
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Development of organosilicon cross-coupling reaction
… is a study for advancing the use of silanols and silanolate cross-coupling in modern organic chemistry
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Phosphazenbasen und die Darstellung nicht-koordinierter Anionen
… Phenole und Phenolate sowie Silanole und Silanolate. Im Rahmen dieser Dissertation wurden sowohl nicht-koordinierte Anionen, als auch wasserstoffverbrückte Derivate synthetisiert und hinsichtlich ihrer Struktur-Reaktivitäts-Beziehung studiert. Des Weiteren wurden Spezialanwendungen …
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Anionic polymerization of a series of cyclocarbosiloxanes
… in benzene, was initiated using cesium trihexyl silanolate, a unique organic soluble liquid catalysts. Benzene served as both a solvent and to shift the position of the NMR SiCH<sub>3</sub> polymer peak away from the monomer peak making it feasible to follow the kinetics on a Varian EM-360 …
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Preparation of Nitrile Containing Siloxane Triblock COpolymers and Their APplication As Stabilizers For Siloxane Magnetic Fluids
… hexamethylcyclotrisiloxane initiated by lithium silanolate endcapped PCPMS macroinitiators. The macroinitiators were prepared by equilibrating mixtures of 3- cyanopropylmethylcyclosiloxanes (DxCN) and dilithium diphenylsilanediolate (DLDPS). DxCNs were synthesized by hydrolysis of …
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Investigation of aryldimethylsilanolates in palladium-catalyzed cross-coupling reactions and development of chiral bis-hydrazone ligands for asymmetric aryl-aryl couplings
… to prepare a variety of arylpalladium(II) silanolate intermediates from easily accessible aryldimethylsilanolates. These in situ generated complexes enable kinetic studies of the transmetalation step in the proposed catalytic cycle under stoichiometric conditions. Hammett analysis reveals …