Reactivity of Hypervalent Species: Reactions of Anionic Penta-Coordinated Silicon Complexes towards Nucleophiles
作者:Alain Boudin、Geneviève Cerveau、Claude Chuit、Robert J. P. Corriu、Catherine Reye
DOI:10.1246/bcsj.61.101
日期:1988.1
The reactivity of anionic penta-coordinated silicon complexes [RSi(O2C6H4-o)2]−Na+ 1 with nucleophilic reagents has been studied. 1 can be reduced to organosilanes RSiH3 by metallic hydrides. Reactions with an excess of Grignard or organolithium reagents (R′MgX or R′Li) gave tetraorganosilanes RSiR′3. When only two molar equivalents of Grignard reagents (R′MgX) or lithium reagents (R′Li) are added
Abstract The CuCl/NaO t -Bu/BINAP system was found to efficientlycatalyze the hydrosilylation of aryl alkyl ketones with excellent enantioselectivities by using phenyl methylsilane as a stoichiometric hydride source. High enantiomeric excesses (up to 97%) and excellent yields (up to 99%) were obtained.
摘要 发现 CuCl/NaO t -Bu/BINAP 系统以苯基甲基硅烷作为化学计量氢化物源,以优异的对映选择性有效催化芳基烷基酮的氢化硅烷化。获得了高对映体过量(高达 97%)和优异的产率(高达 99%)。
Construction of Six-Membered Silacyclic Skeletons via Platinum-Catalyzed Tandem Hydrosilylation/Cyclization with Dihydrosilanes
Catalytic silicon‐carbon or silicon‐heteroatom bond‐forming hydrosilylation has become increasingly important in synthetic chemistry, catalysis and organosilicon chemistry. Herein we report a platinum‐catalyzed one‐pot and tandem hydrosilylation/cyclization of OH‐containing alkynes with dihydrosilanes, allowing for facile synthesis of six‐membered organosiliconcompounds, including silyloxycycles and
Asymmetric silanes: A synthesis of nonracemic alkenylhydrosilanes has been developed based on the desymmetrization of a dihydrosilane through alkenylation with an alkyne using an asymmetric catalyst. The alkenylhydrosilane product can be used as a versatile chiral building block for other functionalized nonracemic silanes through the stereoselective conversion of its hydride and/or alkenyl moiety.