Lithium, (dimethylphenylsilyl)-

 化学構造式
3839-31-4
CAS番号.
3839-31-4
化学名:
别名:
英語名:
Lithium, (dimethylphenylsilyl)-
英語别名:
Lithium, (dimethylphenylsilyl)-
CBNumber:
CB59315348
化学式:
C8H11LiSi
分子量:
142.2
MOL File:
3839-31-4.mol

Lithium, (dimethylphenylsilyl)- 物理性質

溶解性:
sol THF、Et2O。

安全性情報

Lithium, (dimethylphenylsilyl)- 価格

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Lithium, (dimethylphenylsilyl)- 化学特性,用途語,生産方法

物理的性質

NMR studies have shown the reagent is monomeric in ether.

使用

Dimethylphenylsilyllithium is widely used as reagent for addition to carbonyl compounds; deoxygenation reactions; in presence of copper(I) salts, an effective reagent for conjugate addition to α,β-unsaturated compounds, conjugate displacement of tertiary allylic acetates, and silylcupration of alkynes and allenes.

製造方法

Dimethylphenylsilyllithium is readily prepared from the reaction of PhMe2SiCl with 2 equiv of Li metal in THF or from the reaction of PhMe2SiSiMe2Ph with Li metal in THF. Typical reaction procedure involves stirring chlorodimethylphenylsilane with lithium in THF at 0°Cunder N2 for 4–36 h; the chlorosilane is converted into tetramethyldiphenyldisilane in the first 10 min, and the remainder of the time is needed to cleave the disilane. The supernatant reagent solution is calibrated using standard methods and used without further purification for reactions. It is sometimes advantageous to activate the Li metal prior to use by ultrasound irradiation of a hexane suspension, and to use argon as the inert gas to prevent formation of lithium nitrides.

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