Silicon-based cross-coupling has been recognized as one of the most reliable alternatives for constructing carbon–carbon bonds. However, the employment of such reaction as an efficient ring expansion strategy for silacycle synthesis is comparatively little known. Herein, we develop the first intermolecular silacyclization strategy involving Pd-catalyzed silicon-based C(sp2)–C(sp3) cross-coupling. This method
硅基交叉偶联已被公认为构建碳-碳键最可靠的替代方法之一。然而,使用这种反应作为
硅环合成的有效扩环策略相对鲜为人知。在此,我们开发了第一个涉及 Pd 催化的
硅基 C(sp 2 )–C(sp 3 ) 交叉偶联的分子间
硅杂环化策略。该方法允许模块化组装大量结构新颖且有趣的具有良好官能团耐受性的
硅-苯并[ b ]氧杂
环庚烷。该反应成功的关键是
硅原子对氧亲核试剂的亲和力比碳亲核试剂更强,而且
硅杂环丁烷 (SCB) 具有固有的环-应变释放
路易斯酸性。