Abstract1‐Halo‐8‐hydrosilylnaphthalenes undergo 1,2‐silyl migration to form 1‐halo‐7‐silylnaphthalenes. The influence of the substituents on the silicon atom, the solvent effect, and the D‐labeling experiments are investigated. The migration process may include four steps: (a) generation of acid (HI) by the reaction of the hydrosilane with I2, (b) protonation of the naphthalene ring, (c) silyl group migration in the protonated intermediate, and (d) deprotonation of the naphthalene ring.
Monohydrosilanes can be prepared selectively in high yields from the reaction of various aryl and alkyl iodides with ytterbium metal followed by the reaction with dihydrosilanes.
作者:Judith Biedermann、H. Martin R. Wilkening、Frank Uhlig、Ilie Hanzu
DOI:10.1016/j.elecom.2019.03.010
日期:2019.5
In the past, the electrochemicalproperties of organosilicon compounds were investigated for both fundamental reasons and synthesis purposes. Little is, however, known about the electrochemical behaviour of hydrogen-bearing arylsilanes. Here, we throw light on the electrochemicalproperties of 11 arylsilanes compounds, 2 of them synthesized for the first time. The oxidation potentials are found to
1‐naphthylsilanes with internal alkynes afforded silaphenalenes through cleavage of the CH bond at the 8‐position of the naphthalene. [RuH2(CO)P(p‐FC6H4)3}3] efficiently catalyzed the reaction. The use of 1‐naphthyldiphenylsilane as a substrate resulted in a better yield of the annulation product compared to the use of silanes with alkyl groups on the silicon atom. Internal alkynes with both aryl and alkyl
钌催化的1-环naphthylsilanes与通过C的裂解,得到silaphenalenes内炔 H键在萘的8位上。[RuH 2(CO)P(p- FC 6 H 4)3 } 3 ]有效地催化了反应。与使用在硅原子上带有烷基的硅烷相比,使用1-萘基二苯基硅烷作为基材可提高环化产物的收率。在该反应中容许同时具有芳基和烷基的内部炔烃。
Formation of silanethiols by reaction of silanes with carbonyl sulfide: implications for radical-chain reduction of thiocarbonyl compounds by silanes
作者:Yudong Cai、Brian P. Roberts
DOI:10.1016/s0040-4039(00)02109-2
日期:2001.1
tributyltin hydride in the Barton–McCombie deoxygenation of alcohols via their xanthates under mild conditions. Reduction of xanthates by silanes can produce COS as a by-product, leading to the in situ formation of silanethiol that will then act as a protic polarity-reversal catalyst for the reduction.
Electrochemical Radical Silyl‐Oxygenation of Activated Alkenes
作者:Jie Ke、Wentan Liu、Xujiang Zhu、Xingfa Tan、Chuan He
DOI:10.1002/anie.202016620
日期:2021.4.12
An efficient electrochemical radical silyl‐oxygenation of electron‐deficient alkenes is demonstrated, which gives access to a variety of new highly functionalized silicon‐containing molecules, including β‐silyl‐cyanohydrin derivatives in good yields with excellent chemo‐ and regio‐selectivity. This electrochemical radical silylation process conducts under mild conditions without the use of transition