A synergistic catalytic method combining photoredox catalysis, hydrogen‐atom transfer, and proton‐reduction catalysis for the dehydrogenative silylation of alkenes was developed. With this approach, a highly concise route to substituted allylsilanes has been achieved under verymildreactionconditionswithout using oxidants. This transformation features good to excellent yields, operational simplicity
General Synthesis of Trialkyl- and Dialkylarylsilylboranes: Versatile Silicon Nucleophiles in Organic Synthesis
作者:Ryosuke Shishido、Minami Uesugi、Rikuro Takahashi、Tsuyoshi Mita、Tatsuo Ishiyama、Koji Kubota、Hajime Ito
DOI:10.1021/jacs.0c03011
日期:2020.8.19
nucleophiles in organic transformations, which significantly expands the scope of synthetically accessible organosilicon compounds compared to previously reported methods. Thus, the present study can be expected to inspire the development of efficient methods for novel silicon-containing bioactive molecules and organic materials with desirable properties. We also report the first 11B1H} and 29Si1H} NMR spectroscopic
O2 acts as a nonconsumed activator for gold nanoparticles (AuNPs) in the oxidation of hydrosilanes to silanols with water under O2 atmosphere, providing an acceleration of more than 200 times relative to the reaction rate under Ar atmosphere. The AuNP catalyst under aerobic conditions exhibits high activity in the oxidation with high turnover numbers (1230000). Various hydrosilanes including less-reactive bulky ones can be converted to the corresponding silanols in excellent yields. Moreover, the present AuNP catalyst is reusable while maintaining the high performance.
Highly Efficient Iridium-Catalyzed Oxidation of Organosilanes to Silanols
作者:Youngjun Lee、Dong Seomoon、Sundae Kim、Hoon Han、Sukbok Chang、Phil Ho Lee
DOI:10.1021/jo035647r
日期:2004.3.1
Hydrolytic oxidation of organosilanes to the corresponding silanols can be performed highlyefficiently with a catalyst system of [IrCl(C8H12)]2 under essentially neutral and mild conditions, and various types of silanols are produced in good to excellent yields.
使用[IrCl(C 8 H 12)] 2催化剂体系,可以在基本上中性和温和的条件下高度有效地将有机硅烷水解氧化为相应的硅烷醇,并且可以以良好至极好的收率生产各种类型的硅烷醇。
Highly Efficient Etherification of Silanes by Using a Gold Nanoparticle Catalyst: Remarkable Effect of O<sub>2</sub>
O2 is acting! A nanosized hydroxylapatite‐supported Au nanoparticle (NP) catalyst exhibited high activity under aerobic conditions, and various silyl ethers could be obtained from diverse combinations of silanes with alcohols. Moreover, O2 was found to act not as a stoichiometric oxidizing reagent, but as a non‐consumed promoter, significantly boosting the catalytic activity of AuNPs (see figure).
O 2正在表演!纳米羟基磷灰石负载的金纳米颗粒(NP)催化剂在好氧条件下表现出高活性,并且可以通过硅烷与醇的各种组合获得各种甲硅烷基醚。此外,发现O 2并不是化学计量的氧化剂,而是非消耗型促进剂,从而大大增强了AuNPs的催化活性(见图)。