已开发出在1个大气压的二氧化碳下,钯催化的惰性C-H键活化和异喹诺酮的环羰基化反应,导致异吲哚并[2,1 – b ]异喹啉-5,7-二酮。这种转变具有很高的区域选择性和化学选择性,逐步经济性和良好的官能团耐受性。大部分相应的产品以中等到良好的产率获得。它为合成有用的多种异吲哚并[2,1 - b ]异喹啉-5,7-二酮衍生物提供了另一种方法。
The oxidative cyclization of aromatic and heteroaromatic nitriles with alkynes in the presence of a catalytic amount of [RuCl2(p-cymene)}2], Cu(OAc)2.H2O and KPF6 in acetic acid under air gave isoquinolones in good to excellent yields.
Ruthenium-Catalyzed Isoquinolone Synthesis through CH Activation Using an Oxidizing Directing Group
作者:Bin Li、Huiliang Feng、Shansheng Xu、Baiquan Wang
DOI:10.1002/chem.201102445
日期:2011.11.4
The oxidant directs: A mild, practical, efficient, and regioselective Ru‐catalyzed isoquinolone synthesis with a broad substrate scope was reported (see scheme). In this redox neutral process, the aromatic CH bond functionalization can be performed at room temperature without using any external oxidant. The mechanism of the reaction was probed, and it was found that CH activation is the turnover‐limiting
Ruthenium-Catalyzed Oxidative Coupling/Cyclization of Isoquinolones with Alkynes through CH/NH Activation: Mechanism Study and Synthesis of Dibenzo[<i>a</i>,<i>g</i>]quinolizin-8-one Derivatives
作者:Bin Li、Huiliang Feng、Nuancheng Wang、Jianfeng Ma、Haibin Song、Shansheng Xu、Baiquan Wang
DOI:10.1002/chem.201201862
日期:2012.10.1
mechanism of [RuCl2(p‐cymene)}2]‐catalyzed oxidative annulations of isoquinolones with alkynes was investigated in detail. The first step is an acetate‐assisted CH bond activation process to form cyclometalated compounds. Subsequent mono‐alkyne insertion of the RuC bonds of the cyclometalated compounds then takes place. Finally, oxidativecoupling of the CN bond of the insertion compounds occurs to
N-Iminopyridinium ylide-directed, cobalt-catalysed coupling of sp<sup>2</sup> C–H bonds with alkynes
作者:Se Hun Kwak、Olafs Daugulis
DOI:10.1039/d0cc05294a
日期:——
N-Iminopyridinium ylides are used as directing groups and internal oxidants for cobalt-catalysed annulation of sp2 C–H bonds with internal alkynes. The reactions possess excellent compatibility with heterocyclic substrates.
coupling and cyclization of NH isoquinolones with olefins has been realized. Most isoindolo[2,1-b]isoquinolin-5(7H)-one derivatives were obtained in moderate to good yields. Several derivatization reactions including functional group conversion and further CH/olefin coupling were also performed. This transformation realized the less developed Cp*Ir(III) catalyzed coupling and cyclization reaction of
已经实现了铱催化的NH异喹诺酮与烯烃的氧化偶联和环化。大多数异吲哚[2,1- b ]isoquinolin-5(7H)-one 衍生物以中等至良好的产率获得。还进行了几个衍生反应,包括官能团转化和进一步的 C H /烯烃偶联。这种转化实现了较少开发的 Cp*Ir(III) 催化的 NH 底物与烯烃的偶联和环化反应。