Chromium-Catalyzed Borylative Coupling of Aliphatic Bromides with Pinacolborane by Hydrogen Evolution
作者:Aiping Fu、Lixing Zhao、Chao Li、Meiming Luo、Xiaoming Zeng
DOI:10.1021/acs.organomet.1c00171
日期:2021.7.26
precatalyst combined with 4,4′-di-tert-butyl-2,2′-dipyridyl and aluminum, presenting a rare example of using HBpin as a borane reagent by coupling with alkyl bromides in forming borylated alkanes. Mechanistic studies indicate that aluminum plays important roles in the formation of reactive Cr species and aliphatic radicals, which lead to (alkyl)Cr by reaction with HBpin to give the products.
描述了脂肪族溴化物和频哪醇硼烷 (HBpin) 之间的铬催化硼酸化偶联。该反应由低成本和实验室稳定的 CrCl 3作为预催化剂与 4,4'-二叔丁基-2,2'-联吡啶和铝结合促进,这是使用 HBpin 作为硼烷试剂的罕见例子通过与烷基溴偶联形成硼化烷烃。机理研究表明,铝在反应性 Cr 物质和脂肪族自由基的形成中起着重要作用,这些自由基通过与 HBpin 反应得到产物而导致(烷基)Cr。