C(sp)–C(sp<sup>3</sup>) Bond Formation through Cu-Catalyzed Cross-Coupling of<i>N</i>-Tosylhydrazones and Trialkylsilylethynes
作者:Fei Ye、Xiaoshen Ma、Qing Xiao、Huan Li、Yan Zhang、Jianbo Wang
DOI:10.1021/ja3004792
日期:2012.4.4
Copper-catalyzed cross-coupling of N-tosylhydrazones with trialkylsilylethynes leads to the formation of C(sp)-C(sp(3)) bonds. Cu carbene migratory insertion is proposed to play the key role in this transformation.
Transition-Metal-Free Intramolecular Carbene Aromatic Substitution/Büchner Reaction: Synthesis of Fluorenes and [6,5,7]Benzo-fused Rings
作者:Zhenxing Liu、Haocheng Tan、Long Wang、Tianren Fu、Ying Xia、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201409982
日期:2015.3.2
Intramoleculararomaticsubstitution and Büchner reaction have been established as powerful methods for the construction of polycyclic compounds. These reactions are traditionally catalyzed by RhII catalysts with α‐diazocarbonyl compounds as the substrates. Herein a transition‐metal‐free intramoleculararomaticsubstitution/Büchner reaction is presented. These reactions use readily available N‐tosylhydrazones
Palladium(0)-catalyzed C(sp<sup>3</sup>)–Si bond formation <i>via</i> formal carbene insertion into a Si–H bond
作者:Zhenxing Liu、Jingfeng Huo、Tianren Fu、Haocheng Tan、Fei Ye、Mohammad Lokman Hossain、Jianbo Wang
DOI:10.1039/c8cc06768f
日期:——
Pd(0)-Catalyzed formal carbene insertion into Si–H bonds has been achieved as an efficient method for C(sp3)–Si bond formation. The reaction, which uses readily available N-tosylhydrazones as the diazo precursors, is highly efficient and shows a wide substrate scope. Rh(II) and Cu(I) salts, which are the widely used catalysts for carbene insertion reactions, have been proved to be ineffective for the
Synthesis of Phenanthrenes through Copper-Catalyzed Cross-Coupling of <i>N</i>-Tosylhydrazones with Terminal Alkynes
作者:Mohammad Lokman Hossain、Fei Ye、Zhenxing Liu、Ying Xia、Yi Shi、Lei Zhou、Yan Zhang、Jianbo Wang
DOI:10.1021/jo501489c
日期:2014.9.19
for the synthesis of phenanthrenes through the copper-catalyzed reaction of aromatic tosylhydrazones with terminalalkynes is explored. The reaction proceeds via the formation of an allene intermediate and subsequent six-π-electron cyclization–isomerization, affording phenanthrene derivatives in good yields. The transformation can be performed in two ways: (1) with N-tosylhydrazones derived from [1,1
Recyclable Copper(I)-Catalyzed Cross-Coupling of Trialkylsilylethynes and <i>N</i>-Tosylhydrazones Leading to the Formation of C(sp)–C(sp<sup>3</sup>) Bonds
作者:Qian Ye、Wencheng Huang、Li Wei、Mingzhong Cai
DOI:10.1021/acs.joc.2c02691
日期:2023.3.3
A highly efficient heterogeneous copper(I)-catalyzed cross-coupling of trialkylsilylethynes with N-tosylhydrazones has been achieved in dioxane at 90–110 °C via the Cu carbenemigratoryinsertion with an SBA-15-immobilized l-proline-Cu(I) complex [SBA-15-l-Proline-CuI] as the catalyst and LiOtBu as the base, leading to the formation of C(sp)–C(sp3) bonds. The reaction generates a wide variety of a
通过 Cu 卡宾迁移插入和 SBA-15-固定的l-脯氨酸-Cu (I ) 络合物 [SBA-15- l -Proline-CuI] 作为催化剂和 LiO t Bu 作为碱,导致 C(sp)–C(sp 3 ) 键的形成。该反应以中高产率生成多种烷基三烷基甲硅烷基炔烃。这种新型多相铜 (I) 配合物具有与均相 CuI 相当的催化效率,并且可以通过简单的离心过程轻松回收,并且可回收多达 12 次而不会显着损失活性。