Zur herstellung und reaktivität von bis(trimethylsilyl)dilithiomethan
作者:N.J.R. van Eikema Hommes、F. Bickelhaupt、G.W. Klumpp
DOI:10.1016/s0040-4039(00)80725-x
日期:1988.1
At −90°C in THF or similar media bis(trimethylsilyl)dichloromethane 2 reacts with lithium-4,4′-di-tert-butylbiphenyl (LiDBB) or suspensions of freshly sublimed lithium to give the title compound 1 that can bind two equivalents of various electrophiles. 1 has a great propensity for proton abstraction and it is markedly less reactive towards ethyl iodide than (Me3Si)2EtCLi6.
Intramolecular rearrangement, with sulfuric acid, of isopropenyl derivatives of disilane and trisilane
作者:Makoto Kumada、Kiyomi Naka、Mitsuo Ishikawa
DOI:10.1016/s0022-328x(00)83248-9
日期:1964.7
chlorosilanes. It was found that all these compounds readily undergo intramolecularrearrangement with concentrated sulfuric acid in the cold to give, after treatment with ammonium hydrogen fluoride, fluorsilanes with the SiC(CH3)2Si grouping as a framework of the molecule in good yields. An unambiguous evidence for structure of the rearrangement product of 1,2-diisopropenyltetramethyldisilane was afforded
Preparation of Some Bis(fluorodimethylsilyl)alkanes
作者:Makoto Kumada、Kiyomi Naka、Yoshihiro Yamamoto
DOI:10.1246/bcsj.37.871
日期:1964.6
demethylation of bis(trimethylsilyl)alkanes of the general formula Me3SiRSiMe3 by concentrated sulfuric acid, followed by fluorination with ammonium hydrogenfluoride, can successfully be used for the method generally applicable to the preparation of bis(fluorodimethylsilyl)- alkanes, FMe2SiRSiMe2F. Although Si-Me cleavage was the main reaction in most cases, some part of the reaction gave a cleavage between
已经确定,通式 Me3SiRSiMe3 的双(三甲基甲硅烷基)烷烃用浓硫酸脱甲基,然后用氟化氢铵氟化,可以成功地用于通常适用于制备双(氟二甲基甲硅烷基)烷烃的方法, FMe2SiRSiMe2F。尽管在大多数情况下 Si-Me 裂解是主要反应,但部分反应在硅和 R 基团之间产生裂解。发现 R 从硅裂解的难易度按以下顺序降低:CH2,CHMe> (CH2)2>(CH2)3>(CH2)4,(CH2)5,(CH2)6>CHCl>CMe2