1450-18-6Relevant articles and documents
Zinc Bis(triphenylsilyl) Stabilized by N-Heterocyclic Carbene
Lemmerz, Lara E.,Spaniol, Thomas P.,Okuda, Jun
, p. 1269 - 1274 (2016)
Triphenylsilylzinc compounds stabilized by an N-heterocyclic carbene, [Zn(SiPh3)2(IMes)] (2) and [ZnX(SiPh3)(IMes)] [X = Cl (3a), Br (3b), I (3c)] [IMes = 1,3-Bis(2,4,6-trimethylphenyl)imidazole-2-ylidene], were synthesized by transmetalation from [ZnX2(IMes)(THF)0–1] [X = Cl (1a), Br (1b), I (1c)] and [LiSiPh3(THF)3]. According to single-crystal X-ray diffraction, [Zn(SiPh3)2(IMes)] (2) shows a trigonal-planar coordinated central zinc atom, whereas [ZnCl(SiPh3)(IMes)(THF)] (3a-THF) shows a distorted tetrahedral coordination.
METHOD FOR PRODUCING SILYL SODIUM COMPOUND AND METHOD FOR DEOXIDIZING EPOXY COMPOUND
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Paragraph 0087-0089, (2020/05/06)
PROBLEM TO BE SOLVED: To construct a technique which can simply, efficiently and inexpensively synthesize a silyl sodium compound in a small number of processes and in a short time, especially to construct a technique which synthesizes a silyl sodium compound by using easily available reagents from a viewpoint of sustainability without using reagents which are difficult to handle and are toxic. SOLUTION: There is provided a method for synthesizing a silyl sodium compound comprising a step of reacting a dispersion obtained by dispersing a silyl halide compound or a disilane compound with sodium into a dispersion solvent, the silyl halide compound or the disilane compound as a starting compound, in a reaction solvent to obtain the silyl sodium compound. There is also provided a method for deoxidizing an epoxy compound comprising a step of reacting the silyl sodium compound obtained by synthesizing method of the silyl sodium compound with an epoxy compound to deoxidize the epoxy compound to stereoselectively produce an alkene compound. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2020,JPOandINPIT
On the reactivity of silylboranes toward lewis bases: Heterolytic B-Si cleavage vs. adduct formation
Kleeberg, Christian,Borner, Corinna
, p. 2799 - 2806 (2013/07/11)
Silylboranes are important reagents in a variety of catalytic silylation and silaboration reactions. While transition-metal-catalyzed reactions are well established, organo-/Lewis base-catalyzed reactions of silylboranes have only recently emerged. For both catalytic processes the reactivity of silylboranes toward Lewis bases is of relevance. While for organo-catalyzed reactions Lewis base activation of the silylborane has been proposed, transition-metal- and especially copper-catalyzed reactions also frequently require the presence of Lewis basic alkali metal alkoxides. In the present study we explore the reaction of K(18-crown-6) tert-butoxide and the NHC 1,3-diisopropyl-4,5-dimethyl- imidazol-2-ylidene as exemplary Lewis bases with the two silylboranes pinB-SiMe2Ph and pinB-SiPh3 (pin = OCMe 2CMe2O). The reaction with K(18-crown-6) tert-butoxide results in activation of the boron-silicon bond. The isolated product of this activation is either the potassium silyl complex [K(18-crown-6)SiPh3] or [K(18-crown-6)(thf)2][pinB(SiMe2Ph)2], the formal Lewis acid/base adduct of [K(18-crown-6)SiMe2Ph] with pinB-SiMe2Ph. Both complexes react essentially as sources of nucleophilic silyl moieties in reactions with exemplary electrophiles. In contrast, usage of the carbene leads to the formation of isolable Lewis acid/base adducts of the type (NHC)pinB-SiR3, which do not react as sources of nucleophilic silyl moieties. The identification and characterization of these species appears of relevance for the mechanistic understanding and further development of Lewis base/organo- as well as transition-metal-catalyzed silyl transfer reactions. Copyright