立体中心
背景(考古学)
催化作用
硅
化学
组合化学
戒指(化学)
材料科学
发光
纳米技术
对映选择合成
有机化学
光电子学
生物
古生物学
作者
Ji Zhang,Nuo Yan,Cheng‐Wei Ju,Dongbing Zhao
标识
DOI:10.1002/anie.202111025
摘要
The development of a straightforward strategy to obtain enantioenriched silicon-stereogenic benzosiloles remains a challenging yet appealing synthesis venture due to their potential future application in chiral electronic and optoelectronic devices. In this context, all of the existing methods rely on Rh-catalyzed systems and are somewhat limited in scope. Herein, we disclose the first Ni0 -catalyzed ring expansion process that enables the preparation of benzosiloles possessing tetraorganosilicon stereocenters in excellent yields and enantioselectivities. The presented catalysis strategy is further applied to the asymmetric synthesis of silicon-stereogenic bis-silicon-bridged π-extended systems. Preliminary studies reveal that such compounds exhibit fluorescence emission, Cotton effects and circularly polarized luminescence (CPL) activity.
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