作者:Koji Takizawa、Tomoyuki Sekino、Shunta Sato、Tatsuhiko Yoshino、Masahiro Kojima、Shigeki Matsunaga
DOI:10.1002/anie.201902509
日期:2019.7
Co‐catalyzed allylic substitution reactions have received little attention, arguably because of the lack of any known advantage of Co catalysis over either Rh or Ir catalysis. Described here is a general and regioselective Co‐catalyzed allylic alkylation using an in situ catalyst activation by organophotoredox catalysis. This noble‐metal‐free catalytic system exhibits unprecedentedly high reactivities
共催化的烯丙基取代反应很少受到关注,这可能是由于Co催化相对于Rh或Ir催化缺乏任何已知的优势。这里描述的是一般的和区域选择性的共催化烯丙基烷基化反应,使用有机光氧化还原催化原位催化剂活化。这种无贵金属的催化体系首次展示了与烯丙基砜的烯丙基化反应的前所未有的高反应活性和区域选择性,与相关的Rh和Ir催化反应相比,它代表了Co催化方法的独特合成效用。