Arylation of Terminal Alkynes: Transition-Metal-Free Sonogashira-Type Coupling for the Construction of C(sp)–C(sp<sup>2</sup>) Bonds
作者:Mingxing Ye、Mengyuan Hou、Yahao Wang、Xingxing Ma、Kai Yang、Qiuling Song
DOI:10.1021/acs.orglett.3c00586
日期:2023.3.17
Sonogashira reactions, a transition-metal-free version of the arylation of terminal alkynes is elusive. Herein, we report an efficient transition-metal-free Sonogashira-type coupling reaction for the one-pot arylation of alkynes to construct C(sp)–C(sp2) bonds from a tetracoordinate boron intermediate with NIS as a mediator. With its high efficiency, wide substrate range, and good functional group tolerance
炔烃是有机化学中极具吸引力的合成子。尽管过渡金属催化的 Sonogashira 反应很普遍,但末端炔烃芳基化的无过渡金属版本是难以捉摸的。在此,我们报告了一种有效的无过渡金属的 Sonogashira 型偶联反应,用于炔烃的一锅芳基化,以 NIS 作为介体从四配位硼中间体构建 C(sp)–C(sp 2 ) 键。凭借其高效、广泛的底物范围和良好的官能团耐受性,该方法进一步得到了复杂分子的克级合成和后续修饰的支持。