Triorganosilanes, which possess two aryl groups on the silicon atom, undergo palladium-catalyzedsilylation of aryliodides. Aryl(2-furyl)silanes thus obtained are potentially useful starting materials for carbon-carbon bond-forming reactions in the presence of transition-metal catalysts and tetrabutylammonium fluoride.
substituents at the silicon atom. Using the competition reactions, the relative rate constants for the reaction of dichlorocarbene insertion into the SiH bond of thienyl- and furyl-silanes (I and IV) were measured. The reactivity of these silanes was found to be greater than had been expected taking as a basis the Taft σ* constants for the substituent at the silicon atom. This is apparently due to the existence
二甲基(2-噻吩基)-,甲基[二(2-噻吩基)]-,三(2-噻吩基)-和二甲基(2-呋喃基)硅烷(分别为I-IV)与由三氯乙酸钠生成的二氯卡宾的反应在固液相转移条件下,可以提供相应的二氯甲基硅烷,收率为38-66%。噻吩基硅烷的反应性随硅原子上电子接受的噻吩基取代基的数量而降低。使用竞争反应,测量了二氯卡宾插入噻吩基和呋喃基硅烷(I和IV)的SiH键中的相对速率常数。发现这些硅烷的反应性大于以硅原子处的取代基的Taftσ *常数为基础的预期。这显然是由于存在p π - d π杂环π-系统和之间的相互作用d硅的-orbitals。
Visible-Light-Induced Aerobic Oxidation of Tertiary Silanes to Silanols using Molecular Oxygen as an Oxidant
The photocatalyzed synthesis of silanols from tertiary silanes has been carried out using eosin Y under air. This is a metal-free method that uses a low catalyst loading, atmospheric oxygen as the oxidant, and visible-light conditions (blue light).
使用曙红 Y 在空气中进行了由叔硅烷光催化合成硅烷醇。这是一种无金属方法,使用低催化剂负载、大气中的氧气作为氧化剂和可见光条件(蓝光)。
Lukevits, E.; Dzintara, M.; Pudova, O. A., Journal of general chemistry of the USSR, 1983, vol. 53, # 9, p. 1854 - 1857
作者:Lukevits, E.、Dzintara, M.、Pudova, O. A.
DOI:——
日期:——
Lukevits, E.; Pudova, O. A.; Dzinmara, M., Journal of general chemistry of the USSR, 1984, vol. 54, # 2, p. 303 - 305