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。
Reductive Decarboxylative Alkynylation of
<i>N</i>
‐Hydroxyphthalimide Esters with Bromoalkynes
作者:Liangbin Huang、Astrid M. Olivares、Daniel J. Weix
DOI:10.1002/anie.201706781
日期:2017.9.18
A new method for the synthesis of terminal and internal alkynes from the nickel‐catalyzed decarboxylative coupling of N‐hydroxyphthalimide esters and bromoalkynes is presented. This reductivecross‐electrophilecoupling is the first to use a C(sp)−X electrophile, and appears to proceed via an alkynylnickel intermediate. The internal alkyne products are obtained in yields of 41–95 % without the need
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.
Cobalt-catalyzed reductive alkynylation to construct C(sp)-C(sp3) and C(sp)-C(sp2) bonds
作者:Lei Wan、Yizhou Tong、Xi Lu、Yao Fu
DOI:10.1016/j.cclet.2023.109283
日期:2024.7
cross-electrophile coupling has emerged as a reliable method for constructing carbon–carbon bonds. Herein, we report a general method, cobalt-catalyzed reductive alkynylation, to constructC(sp)-C(sp) and C(sp)-C(sp) bonds. This presented reaction has a broad substrate scope, enabling the efficient cross-electrophile coupling between alkynyl bromides with alkyl halides and aryl or alkenyl (pseudo)halides