作者:Thomas C. Atack、Silas P. Cook
DOI:10.1021/jacs.6b03157
日期:2016.5.18
of (bis)pinacolatodiboron with a wide range of alkyl halides, demonstrating the first manganese-catalyzed coupling with alkyl electrophiles. This method allows access to primary, secondary, and tertiary boronic esters from the parent chlorides, which were previously inaccessible as coupling partners. The reaction proceeds in high yield with as little as 1000 ppm catalyst loading, while 5 mol % can
使用低成本的溴化锰 (MnBr2) 和四甲基乙二胺 (TMEDA) 催化(双)频哪醇二硼与多种烷基卤化物的交叉偶联,证明了锰催化与烷基亲电试剂的首次偶联。该方法允许从母体氯化物中获得伯、仲和叔硼酸酯,这些以前作为偶联伙伴是无法获得的。该反应以低至 1000 ppm 的催化剂负载量以高产率进行,而 5 mol% 可在短短 30 分钟内提供高产率。最后,自由基时钟实验表明,在 0 °C 时,直接硼酸化作用胜过其他自由基过程,从而提供合成有用的、温度控制的反应结果。