Redox‐Neutral Manganese(I)‐Catalyzed C−H Activation: Traceless Directing Group Enabled Regioselective Annulation
作者:Qingquan Lu、Steffen Greßies、Sara Cembellín、Felix J. R. Klauck、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.201707396
日期:2017.10.2
groups (TDGs) are used to promote the redox‐neutral MnI‐catalyzed regioselective synthesis of N‐heterocycles. Alkyne coupling partners bearing a traceless directing group, which serves as both the chelator and internal oxidant, were used to control the regioselectivity of the annulation reactions. This operationally simple approach is highly effective with previously challenging unsymmetrical alkyne
报道了一种策略,其中使用无痕导向基团(TDG)来促进N杂环的氧化还原中性Mn I催化的区域选择性合成。带有无痕导向基团的炔烃偶合体既可作为螯合剂,又可作为内部氧化剂,用于控制环化反应的区域选择性。这种操作简单的方法对于以前具有挑战性的不对称炔烃系统(包括无偏二烷基炔烃)具有很好的区域选择性,非常有效。简单的条件和以克为单位进行合成的能力突显了该方法的实用性。还描述了该策略在生物活性化合物PK11209和药物莫西维林的简明合成中的应用。