A nickel-catalyzed silylation reaction of alkyl aryl sulfoxides with silylzinc reagents
作者:Wei-Ze Li、Zhong-Xia Wang
DOI:10.1039/d1ob00840d
日期:——
Ni(PEt3)Cl2-catalyzed silylation of alkyl arylsulfoxides with silylzinc reagents was carried out. This protocol allows alkyl arylsulfoxides to convert to arylsilicon compounds under mild reaction conditions, tolerates a range of functional groups and is suitable for a wide scope of substrates.
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.
Formal Nucleophilic Silyl Substitution of Aryl Halides with Silyllithium Reagents via Halogenophilic Attack of Silyl Nucleophiles
作者:Hajime Ito、Eiji Yamamoto、Satoshi Ukigai
DOI:10.1055/s-0036-1590835
日期:2017.11
developed for the formal nucleophilic silyl substitution of aryl halides with silyllithium or silylpotassium reagents. Dimethylphenylsilyllithium reacted with various aryl halides to form the corresponding arylsilanes in moderate to good yields with concomitant formation of the disilanes under the optimized reaction conditions. Mechanistic studies indicated that this silyl substitution reaction progresses
The palladium‐catalyzed silylation of arylchlorides with silylsilatranes proceeds under activator‐free conditions; hence, wide functional group compatibility is displayed and boryl and siloxy groups are able to survive. Experimental and computational studies revealed that smooth transmetalation from the silylsilatrane to the arylpalladium chloride is facilitated by strong interaction between the Lewis
Direct Introduction of a Dimesitylboryl Group Using Base-Mediated Substitution of Aryl Halides with Silyldimesitylborane
作者:Eiji Yamamoto、Kiyotaka Izumi、Ryosuke Shishido、Tomohiro Seki、Noriaki Tokodai、Hajime Ito
DOI:10.1002/chem.201604021
日期:2016.12.5
The first dimesitylboryl substitution of aryl halides with a silylborane bearing a dimesitylboryl group in the presence of alkali‐metal alkoxides is described. The reactions of aryl bromides or iodides with Ph2MeSi−BMes2 and Na(OtBu) afforded the desired aryl dimesitylboranes in good to high yields and with high borylation/silylation ratios. Selective reaction of the sterically less‐hindered C−Br bond
描述了在碱金属醇盐的存在下,用带有一个二甲磺基的甲硅烷基硼烷对芳基卤进行的第一个二甲磺基取代。芳基溴化物或碘化物与Ph 2 MeSi-BMes 2和Na(O t Bu)的反应以高至高收率和高硼化/甲硅烷基化比提供了所需的芳基二聚三聚戊二烯。二溴芳烃在空间上受阻较小的C-Br键的选择性反应提供了单硼化产物。该反应用于快速构建具有不对称联苯间隔基的D-π-A芳基二甲硅烷基硼烷。