Formation of α-Lithio Siloles from Silylated 1,4-Dilithio-1,3-Butadienes: Mechanism and Applications
作者:Qian Luo、Chao Wang、Li Gu、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1002/asia.200900287
日期:2010.5.3
A full account of a useful transformation from silylated 1,4‐dilithio‐1,3‐butadienes to α‐lithio siloles is described. These lithio siloles formed by this procedure are general, in terms of substitution patterns and synthetic methods, affording diversified silole derivatives. Notably, some structurally complex molecules, such as bridged bis‐silole compounds, have been synthesized easily and successfully
Calcium-Mediated C–H and C–F Bond Cleavage: Synthesis of Indenes and Perfluorodibenzopentalenes from 1,4-Dilithio-1,3-butadienes
作者:Baosheng Wei、Heng Li、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1021/acs.organomet.6b00073
日期:2016.5.23
The development of Ca-mediated reactions is of great importance and is in great demand in both organometallic and organic chemistry. In this paper, we report that calcium iodide efficiently promotes the transformation of various 1,4-dilithio-1,3-butadienes into indenes or perfluorodibenzopentalenes, via an intramolecular C-H or C-F bond cleavage, respectively. In the reaction process, the Ca-induced s-cis/trans configurational isomerization of 1,4-dilithio-1,3-butadienes is followed by the subsequent nucleophilic C-H or C-F bond activation.