Synthesis of isoindolinones via palladium-catalyzed C–H activation of N-methoxybenzamides
作者:Dan-Dan Li、Ting-Ting Yuan、Guan-Wu Wang
DOI:10.1039/c1cc15897j
日期:——
The synthesis of isoindolinones from N-methoxybenzamides and alkenes has been achieved by Pd-catalyzed ortho sp2 CâH activation and intramolecular oxidative amidation, which involve the cleavage of four bonds and formation of two bonds.
DDQ-promoted direct C–H amination of ethers with N-alkoxyamides under visible-light irradiation and metal-free conditions
作者:Yan Zhang、Lei Wang、Zhiming Wang、Wei Chen
DOI:10.1016/j.tet.2019.130516
日期:2019.9
A C(sp3)–N bond forming reaction between N-alkoxyamides and simple ethers has been developed. In the presence of commercially available 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ), a variety of N-methoxyamides and ethers undergo this transformation smoothly to deliver the corresponding products in good yields under visible-light irradiation and metal-free conditions at room temperature.
Palladium‐Catalyzed Inert C−H Bond Activation and Cyclocarbonylation of Isoquinolones with Carbon Dioxide Leading to Isoindolo[2,1‐
<i>b</i>
]isoquinoline‐5,7‐Diones
作者:Kelu Yan、Junbin Jin、Yong Kong、Bin Li、Baiquan Wang
DOI:10.1002/adsc.201900305
日期:2019.7.2
A palladium‐catalyzedinertC−Hbondactivation and cyclocarbonylation of isoquinolonesleading to isoindolo[2,1‐b]isoquinoline‐5,7‐diones under 1 atm of carbondioxide has been developed. This transformation features high regio‐ and chemo‐selectivity, step‐economy, and good functional group tolerance. Most of the corresponding products were obtained in moderate to good yields. It offers an alternative
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。
Chiral Bicyclo[2.2.2]octane‐Fused CpRh Complexes: Synthesis and Potential Use in Asymmetric C−H Activation
作者:Guozhu Li、Xiaoqiang Yan、Jijun Jiang、Hao Liang、Chao Zhou、Jun Wang
DOI:10.1002/anie.202010489
日期:2020.12.7
A new class of chiral cyclopentadienyl rhodium(I) complexes (CpRhI) bearing C2‐symmetric chiral bridged‐ring‐fused Cp ligands was prepared. The complexes were successfully applied to the asymmetric C−H activation reaction of N‐methoxybenzamides with quinones, affording a series of chiral hydrophenanthridinones in up to 82 % yield with up to 99 % ee. Interestingly, structure analysis reveals that the
<i>N</i>-Methoxyamide: An Alternative Amidation Reagent in the Rhodium(III)-Catalyzed C–H Activation
作者:Chao Zhou、Junqi Zhao、Weicong Guo、Jijun Jiang、Jun Wang
DOI:10.1021/acs.orglett.9b03357
日期:2019.12.6
In the field of transition-metal-catalyzed C-Hactivation, N-methoxyamides are widely used as C-Hactivation substrate. Unexpectedly, in this work N-methoxyamides were found to work as efficient amidation reagents in the rhodium(III)-catalyzedC-Hactivation with boric acid as a cocatalyst. This reaction features broad substrate scope and good yields.