Palladium-Catalyzed C–H Activation and Cyclization of Anilides with 2-Iodoacetates and 2-Iodobenzoates: An Efficient Method toward Oxindoles and Phenanthridones
Abstract A concise approach to the synthesis of oxindoles and phenanthridones from anilides is described. In the presence of catalytic amount of Pd(OAc)2, 2-iodoacetates and 2-iodobenzoates can be used to functionalize ortho C–H bond of anilides, which subsequently undergo intramolecular cyclization to give the products. A possible reaction mechanism that involves a PdII/PdIV catalytic cycle is proposed
摘要 描述了一种由苯胺合成羟吲哚和菲啶酮的简洁方法。在存在催化量的Pd(OAc)2的情况下,可以使用2-碘乙酸酯和2-碘苯甲酸酯官能化苯甲酸酯的邻位C-H键,随后进行分子内环化以生成产物。在详细的机理研究的支持下,提出了可能的涉及Pd II / Pd IV催化循环的反应机理。 描述了一种由苯胺合成羟吲哚和菲啶酮的简洁方法。在存在催化量的Pd(OAc)2的情况下,可以使用2-碘乙酸酯和2-碘苯甲酸酯官能化苯甲酸酯的邻位C-H键,随后进行分子内环化以生成产物。在详细的机理研究的支持下,提出了可能的涉及Pd II / Pd IV催化循环的反应机理。
Rhodium(III)-Catalyzed Annulation of<i>N</i>-Methoxybenzamides with Heterobicyclic Alkenes by C-H Functionalization: Synthesis of Benzo[<i>b</i>]phenanthridinones
Polycyclic products, active intermediates: Rhodium‐catalyzed annulation reactions provide polycyclic products in excellent yields starting from N‐methoxybenzamides and 7‐oxa/azabenzonorbornadienes. The products retain the oxygen/nitrogen‐bridged structures, which show possible reactivity for further transformations.