Rh-Catalyzed Oxidative Coupling between Primary and Secondary Benzamides and Alkynes: Synthesis of Polycyclic Amides
作者:Guoyong Song、Dan Chen、Cheng-Ling Pan、Robert H. Crabtree、Xingwei Li
DOI:10.1021/jo101596d
日期:2010.11.5
synthesis of isoquinolones from benzamides and alkynes via the oxidative ortho C−Hactivation of benzamides has been developed. Ag2CO3 proved to be an optimal oxidant when MeCN was used as a solvent, and [RhCp*Cl2]2 was utilized as an efficient catalyst. Both N-alkyl and N-aryl secondary benzamides can be applied as effective substrates. Furthermore, primary benzamides react with two alkyne units, leading
已开发出一种方法,可通过苯甲酰胺的氧化邻位C-H活化从苯甲酰胺和炔烃高产且轻松地合成异喹诺酮。当以MeCN为溶剂和[RhCp * Cl 2 ] 2时,Ag 2 CO 3被证明是最佳氧化剂。被用作有效的催化剂。N-烷基和N-芳基仲苯甲酰胺都可以用作有效的底物。此外,一级苯甲酰胺与两个炔烃单元反应,通过双重CH活化和氧化偶合生成三环产物。还证明了与结构相关的1-羟基异喹啉的反应性,其中可以同时生成含N和O的rhodocyclic中间体,从而导致构建不同的含O或N的杂环。
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
Diversity-Oriented Synthesis through Rh-Catalyzed Selective Transformations of a Novel Multirole Directing Group
作者:Bo Su、Jiang-bo Wei、Wen-lian Wu、Zhang-jie Shi
DOI:10.1002/cctc.201500410
日期:2015.9.14
functionalization, directing‐group strategy was developed for the improvement of chemical reactivity and selectivity. Recently, to avoid the inherent limitations of traditional mono‐role directinggroups, a dual‐role oxidizing‐directing‐group strategy was developed, in which the directinggroup acts both as directinggroup and oxidant. Herein, we report a multiroledirectinggroup, which possesses multiple
Synthesis of indoles and polycyclic amides via ruthenium(<scp>ii</scp>)-catalyzed C–H activation and annulation
作者:Hui Lin、Shuai-Shuai Li、Lin Dong
DOI:10.1039/c5ob01788b
日期:——
Ruthenium(ii)-catalyzed oxidative coupling of NH protic amides with alkynes has been developed for the synthesis of a diversity of complex structures, such as N-acyl indole and tricyclic amide derivatives.
Investigation and Comparison of the Mechanistic Steps in the [(Cp*MCl<sub>2</sub>)<sub>2</sub>] (Cp*=C<sub>5</sub>Me<sub>5</sub>; M=Rh, Ir)-Catalyzed Oxidative Annulation of Isoquinolones with Alkynes
作者:Nuancheng Wang、Bin Li、Haibin Song、Shansheng Xu、Baiquan Wang
DOI:10.1002/chem.201203374
日期:2013.1.2
The mechanism of the [(Cp*MCl2)2] (M=Rh, Ir)‐catalyzed oxidativeannulation reaction of isoquinolones with alkynes was investigated in detail. In the first acetate‐assisted CH‐activation process (cyclometalated step) and the subsequent mono‐alkyne insertion into the MC bonds of the cyclometalated compounds, both Rh and Ir complexes participated well. However, the desired final products, dibenzo[a
详细研究了[(Cp * MCl 2)2 ](M = Rh,Ir)催化的异喹诺酮与炔烃氧化环化反应的机理。在第一个乙酸盐辅助的CH活化过程(环金属化步骤)和随后的单炔插入环金属化化合物的MC键中,Rh和Ir配合物均参与得很好。但是,仅当Rh物种参与CN键的最终氧化偶联时,才以高收率形成所需的最终产物二苯并[ a,g ]喹啉嗪8一衍生物。此外,Rh I在该转化过程中分离出夹心中间体。发现铱络合物在氧化偶联过程中是无活性的。所有相关中间体均已通过单晶X射线衍射分析进行了充分表征和测定。基于该机理研究,提出了用于该反应的Rh III →Rh I →Rh III催化循环。