This work describes a base-mediated borylsilylation of benzylic ammoniumsalts to synthesize geminal silylboronates bearing benzylic proton under mild reaction conditions. Deaminative silylation of aryl ammoniumsalts was also achieved in the presence of LiOtBu. This strategy which is featured with high efficiency, mild reaction conditions, and good functional group tolerance provides efficient routes
这项工作描述了碱介导的苄基铵盐的硼基甲硅烷基化,以在温和的反应条件下合成带有苄基质子的孪晶甲硅烷基硼酸酯。在 LiO t Bu存在下也实现了芳基铵盐的脱氨基甲硅烷基化。该策略具有高效、反应条件温和、官能团耐受性好的特点,为胺类的后期官能化提供了有效途径。
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
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.
kinetically inert in cross-coupling reactions compared to those of carbon–halogen bonds. Thus, developing methodologies for the activation of CO bonds in cross-coupling reactions remains a major challenge. We disclose an unprecedented nickel mediated cross-coupling of carbamates with silylmagnesium reagents that does not require the expensive silylboranes. Silylmagnesium reagents were prepared from either silyllithium
R3SiMgMe and MnCl2 are disclosed. (1) The manganese species reacted with terminal acetylenes to give 1,2-disilylated 1-alkenes. Mono- and bis(trimethylsilyl) acetylenes gave tri- and tetrasilylated ethenes, respectively, in good yields. Highly strained tetrakis(trimethylsilyl) ethene has now become easily accessible by this technique. (2) The reaction of alkenyl halides, alkenyl sulfides, and enol phosphates