2‐(aryldimethylsilyl)‐1‐tert‐butylethyl trifluoroacetates were determined conductimetrically in 60% (v/v) aqueous ethanol. The effects of aryl substituents at the silicon atom on the solvolysis rates at 50 °C were correlated with parameters of r+ = 0.15 with the Yukawa–Tsuno equation, giving ρ values of −1.5 for both secondary α‐Me and α‐tert‐Bu systems. The ρ values for those secondary systems are less negative than
Construction of siloxane structures with P-Tolyl substituents at the silicon atom
作者:Sergey A. Milenin、Sofia N. Ardabevskaia、Roman A. Novikov、Pavel N. Solyev、Yaroslav V. Tkachev、Alexander D. Volodin、Alexander A. Korlyukov、Aziz M. Muzafarov
DOI:10.1016/j.jorganchem.2020.121497
日期:2020.11
In this work, general approaches for preparing p-tolylsilanes as promising precursors for the synthesis of functionalized organosilicon compounds are discussed. Various synthetic techniques, including new and specially developed ones, were used to obtained p-tolylsiloxanes of different structures. Our findings resulted in advanced methods over the previously reported procedures, since they do not imply
Silicon–Carbon Unsaturated Compounds. XVI. Photorearrangement of an Adduct Derived from Reaction of a Silicon–Carbon Unsaturated Compound with<i>t</i>-Butyl Alcohol
Photolysis of pentamethylphenyldisilane in the presence of t-butyl alcohol gave a mixture of adducts which were readily oxidized to 1-(t-butoxydimethylsilyl)-2-(trimethylsilyl)benzene by oxygen. Photolysis of p-tolylpentamethyldisilane in the presence of t-butyl alcohol afforded 4-(t-butoxydimethylsilyl)-1-methyl-5-trimethylsilyl-1,3-cyclohexadiene (4) as a primary photoproduct. The UV-irradiation
The selective synthesis of di- and cyclosiloxanes bearing several hidden p-tolyl-functionalities
作者:Irina K. Goncharova、Sergey P. Kutumov、Roman A. Novikov、Tatyana Yu. Shiryaeva、Alexander D. Volodin、Alexander A. Korlyukov、Ashot V. Arzumanyan
DOI:10.1016/j.jorganchem.2022.122482
日期:2022.11
This study reports the development of a selective method for the synthesis of p-tolylsiloxanes, namely, symmetrical disiloxanes and cyclotetrasiloxanes, by hydrolytic condensation of p-tolyl-containing mono(ethoxy)silanes and di(ethoxy)silanes in the presence of [Me4N]+OH–. The reaction occurs under mild and simple reaction conditions: at 30 °C, under atmospheric pressure, in 1–5 h, in acetone and