One‐Shot Radical Cross Coupling Between Benzyl Alcohols and Alkenyl Halides Using Ni/Ti/Mn System
作者:Takuya Suga、Yuuki Takahashi、Yutaka Ukaji
DOI:10.1002/adsc.202000945
日期:2020.12.22
A “one‐shot” cross coupling between benzyl alcohols and alkenyl halides has been established. A combination of low‐valent Ti‐mediated C−OH homolysis and the prominent chemistry of Ni‐based radical catalysis afforded the desired cross‐coupled product with good efficiency. The reaction proceeded regardless of the electronic property of benzyl alcohols, and Ar−B bond remained intact throughout the reaction
在苄醇和烯基卤化物之间建立了“一次性”交叉偶联。低价Ti介导的C-OH均解反应和突出的Ni基自由基催化化学作用相结合,提供了所需的交叉偶联产物,效率很高。无论苄醇的电子性质如何,反应都会进行,并且Ar-B键在整个反应过程中保持完整。具有各种取代方式的烯基溴化物可用于该反应。尝试利用具有空间需求的三取代烯烃,表明空间位阻主要抑制了Ni物种的自由基捕获。该反应可以是合成密集取代的烯丙基苯衍生物的简单有效的策略。