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.
It has been established that a cationicrhodium(I)/BINAPcomplex catalyzes the cycloisomerization of 2-silylethynylphenols, leading to 3-silylbenzofurans, via 1,2-silicon migration. Similarly, the cycloisomerization of 2-silylethynylanilines, leading to 3-silylindoles, via 1,2-silicon migration was catalyzed by a cationicrhodium(I)/H8–BINAP complex.
已经确定,阳离子铑(I)/ BINAP络合物催化2-甲硅烷基乙炔基苯酚的环异构化,通过1,2-硅迁移导致3-甲硅烷基苯并呋喃。同样,阳离子铑(I)/ H 8 -BINAP络合物催化通过1,2-硅迁移的2-甲硅烷基乙炔基苯胺的环异构化,生成3-甲硅烷基。
Photocatalytic C–Si Bond Formations Using Pentacoordinate Silylsilicates as Silyl Radical Precursors: Synthetic Tricks Using Old Reagents
photocatalytic C–Si formation strategy has been disclosed by uncovering the reactivity of Martin’s spirosilane-derived pentacoordinate silylsilicates as silyl radicalprecursors. The hydrosilylation of a broad spectrum of alkenes and alkynes, as well as the C–H silylation of heteroarenes, has been demonstrated. Remarkably, Martin’s spirosilane was stable and could be recovered via a simple workup process
通过揭示 Martin 的螺硅烷衍生的五配位甲硅烷基硅酸盐作为甲硅烷基自由基前体的反应性,揭示了可见光诱导的光催化 C-Si 形成策略。已经证明了广谱烯烃和炔烃的氢化硅烷化,以及杂芳烃的 C-H 硅烷化。值得注意的是,Martin 的螺硅烷非常稳定,可以通过简单的后处理过程回收。此外,使用水作为溶剂或低能量绿色 LED 作为替代能源,反应进行得很好。
Nickel-Catalyzed Synthesis of Silanes from Silyl Ketones
An unprecedented nickel-catalyzed decarbonylative silylation via CO extrusion intramolecular recombination fragment coupling of unstrained and nondirecting group-assisted silylketones is described. The inexpensive and readily available catalyst performs under mild reaction conditions and enables the synthesis of structurally diverse arylsilanes, including heterocyclic and natural product derivatives
We report herein the facile and practical construction of α,β-unsaturatedketones via rhodium-catalyzed direct acylation of vinylsilanes with readily available and abundant carboxylic acids. This protocol features access to a diverse array of synthetically useful functionalities with moderate to excellent yields. More importantly, the late-stage functionalization of pharmaceuticals was also realized