AbstractHerein, we report a ruthenium‐catalyzed ketone directed ortho‐arylation wherein the addition of a bidentate NC‐type ligand, most effectively 2‐(o‐tolyl) pyridine, significantly enhances the C−H arylation reaction. Various aryl‐alkyl ketones, including cyclic, aliphatic, and heterocyclic ones, are competent substrates, and arylboronic acid esters were used as aryl sources. However, substitution with OMe and CF3 in the aromatic ring of the ketone substrates is not tolerated, while such residues on the benzoic ester are possible. Notably, this study provides valuable insights into ketone‐directed ortho arylation in the presence of 2‐(o‐tolyl) pyridine and adds additional options for catalyst and ligand optimization in ruthenium‐catalyzed C−H functionalization.
摘要我们在此报告了一种钌催化的酮定向正芳基化反应,在该反应中,添加双齿 NC 型配体(最有效的是 2-(邻甲苯基)吡啶)可显著增强 C-H 芳基化反应。各种芳基-烷基酮(包括环状、脂肪族和杂环酮)都是合格的底物,芳基硼酸酯也被用作芳基来源。然而,酮类底物的芳香环中不能容忍 OMe 和 CF3 的取代,而苯甲酸酯上的此类残留物则是可能的。值得注意的是,这项研究为 2-(邻甲苯基)吡啶存在下的酮定向正芳基化提供了宝贵的见解,并为钌催化 C-H 功能化的催化剂和配体优化提供了更多选择。