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。
Synthesis of 2-Pyridones and Iminoesters via Rh(III)-Catalyzed Oxidative Coupling between Acrylamides and Alkynes
作者:Yan Su、Miao Zhao、Keli Han、Guoyong Song、Xingwei Li
DOI:10.1021/ol102306c
日期:2010.12.3
Catalytic oxidative coupling between acrylamides and alkynes was achieved using 0.5 mol % loading of [RhCp*Cl-2](2) with Cu(OAc)(2) as an oxidant. 2-Pyridones, iminoesters, and substituted indoles could be obtained as a result of the electronic and steric effects of the substituents in the acrylamides.
Ruthenium-Catalyzed Oxidative Synthesis of 2-Pyridones through C–H/N–H Bond Functionalizations
作者:Lutz Ackermann、Alexander V. Lygin、Nora Hofmann
DOI:10.1021/ol201244s
日期:2011.6.17
An Inexpensive ruthenium catalyst enabled oxidative annulations of alkynes by acrylamides with ample scope, which allowed for the preparation of 2-pyridones employing various electron-rich and electron-deficient acrylamides as well as (di)aryl- and (di)alkyl-substituted alkynes.