Robust procedures for two mechanistically distinct C(sp3)−Ge bond formations from alkyl electrophiles and germanium nucleophiles are reported. The germanium reagents were made available as bench‐stable solutions by lithium‐to‐magnesium and lithium‐to‐zinc transmetalation, respectively. The germanium Grignard reagent reacts with various primary and secondary alkyl electrophiles by an ionic nucleophilic
On the structural diversity of [K(18-crown-6)EPh3] complexes (E = C, Si, Ge, Sn, Pb): synthesis, crystal structures and NOESY NMR study
作者:Christian Kleeberg
DOI:10.1039/c3dt50523e
日期:——
complexes [K(18-crown-6)EPh3] 6a–e of group 14 elements (E = C, Si, Ge, Sn, Pb) was synthesised by alkoxide induced heterolytic cleavage of boron–element compounds. The complexes 6a–e are isolated as storable solids possibly useful as sources of nucleophilic [EPh3]− moieties. The solid state structures of 6a–e were established by X-ray crystalstructure determination. Whilst all structures can be described
One-Pot Rapid Access to Benzyl Silanes, Germanes, and Stannanes from Toluenes Mediated by a LiN(SiMe<sub>3</sub>)<sub>2</sub>/CsCl System
作者:Yaqi Yuan、Yuanyun Gu、Yan-En Wang、Jiali Zheng、Jiaying Ji、Dan Xiong、Fei Xue、Jianyou Mao
DOI:10.1021/acs.joc.2c01612
日期:2022.11.4
Organo-silanes, germanes, and stannanes are considered to be conducive to the development of cross-coupling reactions because they are stable, nontoxic, and easy to handle. Using feedstock toluenes, one-pot direct benzylic C–H silylations, germylations, and stannylations are developed. Simply combining toluenes, LiN(SiMe3)2/CsCl, and R3MCl (M = Si, Ge, Sn) generates a diverse array of bench-stable
Stannyl-Lithium: A Facile and Efficient Synthesis Facilitating Further Applications
作者:Dong-Yu Wang、Chao Wang、Masanobu Uchiyama
DOI:10.1021/jacs.5b06587
日期:2015.8.26
We have developed a highly efficient, practical, polycyclic aromatic hydrocarbon (PAH-catalyzed synthesis of stannyl lithium (Sn-Li), in which the tin resource (stannyl chloride or distannyl) is rapidly and quantitatively transformed into Sn-Li reagent at room temperature without formation of any (toxic) byproducts. The resulting Sn-Li reagent can be stored at ambient temperature for months and shows high reactivity toward various substrates, with quantitative atom efficiency.