Directed dilithiation of hexafluorocumyl alcohol - formation of a reagent for the facile introduction of a stabilizing bidentate ligand in compounds of hypervalent sulfur (10-S-4), phosphorus (10-P-5), silicon (10-Si-5), and iodine (10-I-3)
Terminal-oxidant-free photocatalytic C–H alkylations of heteroarenes with alkylsilicates as alkyl radical precursors
作者:Gun Ikarashi、Tatsuya Morofuji、Naokazu Kano
DOI:10.1039/d0cc03286g
日期:——
Alkylsilicates bearing C,O-bidentate ligands could achieve photocatalytic C–H alkylations of heteroarenes under acidic conditions without adding any terminal oxidant.
Hypervalent Silicon and Phosphorus Atoms in Single Molecules: Synthesis and Properties of Phosphoranylalkoxysilicates and a Phosphoranyloxysilicate
作者:Naokazu Kano、Hideaki Miyake、Takayuki Kawashima
DOI:10.1246/cl.2007.1260
日期:2007.10.5
The first hypervalent compounds containing both a pentacoordinated silicon atom and a pentacoordinated phosphorus atom were synthesized by the cooperative three-component reaction of a phosphoranide, a silane, and THF accompanying the ring opening of THF, or by the nucleophilic addition of phosphoranylalkoxides to a silane. Hydrolysis of the phosphoranyloxysilicate and phosphoranylalkoxysilicates gave the hydroxysilicate and the corresponding phosphoranes.
photocatalytic Giese‐type reaction with alkylsilicates bearing C,O‐bidentate ligands as stable alkyl radical precursors has been reported. The alkylsilicates were prepared in one step from organometallic reagents. Not only primary, secondary, and tertiary alkyl radicals, but also elusive methyl radicals, could be generated by using the present reaction system. The generated radicals were trapped by electron‐deficient
data on a lithium derivative of an anionic NHC-borane complex functionalized by a silicate have been obtained and reveal an interaction between the three hydrogens of the borane and the lithium cation. Assessment of the reactivity highlights the higher hydridicity of the anionic NHC-borane compared to the parent IPr-BH3. Finally, electronic properties of this new species have been evaluated by means
Pseudorotational mechanism for the inversion of 10-Si-5 siliconates: ligand structure and reactivity
作者:William H. Stevenson、Scott Wilson、J. C. Martin、William B. Farnham
DOI:10.1021/ja00308a030
日期:1985.10
Determination des structures cristallines d'un spirane spirobi-benzoaxasilole et d'un phenylsiliconate. Mesure par spectrometrie RMN de 19 F des vitesses de permutation de coordinat
Determination desstructures cristallines d'un spirane spirobi-benzoaxasilole et d'un phenylsiliconate。Mesure par spectrometrie RMN de 19 F des vitesses de permutation de coordinat