Synthesis and Reactivity of Functionalized Arylcopper Compounds by Transmetalation of Organosilanes
作者:Jessica R. Herron、Zachary T. Ball
DOI:10.1021/ja8070804
日期:2008.12.10
and parcel of synthetic chemistry. Organosilanes potentially represent a cheap, robust, and environmentally benign precursor to reactive organometallics, but the nature of the very stable C−Si bond has generally prevented their use as precursors to more reactive organometallics. We present investigations into a copper fluoride complex which activates organosilanes in anhydrous media under mild conditions
A regiospecific silver-mediated fluorination of arylsilanes is reported. The reaction is operationally simple, and employs Ag2O as readily available, inexpensive silver source, which can be recovered.
报道了芳基硅烷的区域特异性银介导的氟化。该反应操作简单,并使用 Ag 2 O 作为容易获得的廉价银源,可以回收。
Improved Synthesis of Aryltriethoxysilanes via Palladium(0)-Catalyzed Silylation of Aryl Iodides and Bromides with Triethoxysilane
作者:Amy S. Manoso、Philip DeShong
DOI:10.1021/jo010621q
日期:2001.11.1
silylation of aryl halides with triethoxysilane has been expanded to include aryl bromides. A more general Pd(0) catalyst/ligand system has been developed that activates bromides and iodides: palladium(0) dibenzylideneacetone (Pd(dba)(2)) is activated with 2-(di-tert-butylphosphino)biphenyl (Buchwald's ligand) (1:2 mol ratio of Pd/phosphine). Electron-rich para- and meta-substituted aryl halides (including
Organosilane compound and organosilica obtained therefrom
申请人:Mizoshita Norihiro
公开号:US20080227939A1
公开(公告)日:2008-09-18
Provided is an organosilane compound expressed by any one of the following general formulae (1) to (7):
(wherein: Ar represents a phenylene group or the like; R
1
represents a hydrogen atom or the like; R
2
to R
8
each represent a methyl group or the like; n represents an integer in a range from 0 to 2; m represents an integer of 1 or 2; L represents a single bond or the like; X represents a hydrogen atom or the like; and Y represents a hydrogen atom or the like).
Further studies of fluoride ion entrapment in octasilsesquioxane cages; X-ray crystal structure studies and factors that affect their formation
作者:Peter G. Taylor、Alan R. Bassindale、Youssef El Aziz、Manuel Pourny、Richard Stevenson、Michael B. Hursthouse、Simon J. Coles
DOI:10.1039/c1dt11340b
日期:——
A range of fluoride-encapsulated octasilsesquioxane cage compounds have been prepared using the TBAF route. Our studies suggest that whilst it is relatively straightforward to prepare fluoride-encapsulated octasilsesquioxane cage compounds with adjacent sp2 carbons, leading to a range of aryl and vinyl substituted compounds, the corresponding sp3 carbon derivatives are more capricious, requiring an electron withdrawing group that can stabilize the cage whilst not acting as a leaving group. Analysis by X-ray crystallography and solution 19F/29Si NMR spectroscopy of R8T8@F− reveal very similar environments for the encapsulated fluoride octasilsesquioxane cages. Migration of a fluoride ion from inside the cage to outside the cage without breaking the T8 framework and the possibility of encapsulating other anions within silsesquioxane cages have been also investigated.