Synthesis of Isocoumarin Derivatives via the Copper-Catalyzed Tandem Sequential Cyclization of 2- Halo-<i>N</i>-phenyl Benzamides and Acyclic 1,3-Diketones
作者:Veerababurao Kavala、Cheng-Chuan Wang、Deepak Kumar Barange、Chun-Wei Kuo、Po-Min Lei、Ching-Fa Yao
DOI:10.1021/jo300501j
日期:2012.6.1
A facile and rapid synthesis of isocoumarin derivatives using a copper-catalyzed tandem C–C/C–O coupling strategy from readily available substrates is described. The reactions of a wide range of 2-iodo-N-phenyl benzamides and acyclic diketones as starting materials were investigated.
A one-potstrategy for the synthesis of 3-hydroxy-3-furylisoindolinone derivatives is reported. The reaction proceeds via a copper-catalyzed oxidative cascade inter-molecular double cyclization of 2-iodobenzamide derivatives and propargyl dicarbonyl compounds in the presence of oxygen. The strategy involves several reactions including cyclization/coupling/double C(sp3)−H functionalization in a cascade
Visible-Light-Enabled Catalytic Approach to <i>N</i>,<i>O</i>-Spirocycles through Amidyl Radical Addition/Cyclization
作者:Zhihui Liang、Yushen Yu、Lele Zhang、Guotao Xue、Min Liu、Yirui Zhang、Mingqiang Huang、Lina Cai、Shunyou Cai
DOI:10.1021/acs.orglett.3c03855
日期:2024.1.12
A rational combination of photoredox catalyst anthraquinone and hydrogen atom transfer (HAT) catalyst methyl thioglycolate allows for the rapid and straightforward conversion of a range of 2-amidated acetylenic alcohols to multifunctional N,O-spirocycles under visible light irradiation. With oxygen as the sole terminal oxidant, these reactions can be carried out efficiently at room temperature without
Synthesis of <i>N</i>-substituted phthalimides <i>via</i> Pd-catalyzed [4+1] cycloaddition reaction
作者:Chengxian Hu、Lu Wang、Yuanyuan Wu、Yonglong Zheng、Ying Fu、Zhengyin Du
DOI:10.1039/d3cc04534j
日期:——
A novel Pd-catalyzed assembly of N-phenylphthalimide by merging of [4+1] cycloaddition and difluorocarbene transfer carbonylation from 2-iodo-N-phenylbenzamides and difluorocarbene precursors is disclosed. In this reaction, difluorocarbene acts as a carbonyl source and simultaneously forms one C-C bond, one C-N bond and one C=O bond to produce N-phenylphthalimides in high yields.
Copper(II)-Catalyzed Tandem Synthesis of Substituted 3-Methyleneisoindolin-1-ones
作者:Jie Pan、Zhen Xu、Runsheng Zeng、Jianping Zou
DOI:10.1002/cjoc.201300346
日期:2013.8
AbstractAn efficient strategy for the synthesis of a variety of 3‐methyleneisoindolin‐1‐ones has been developed. The reaction proceeded from coupling of 2‐iodobenzamides (or 2‐bromobenzamides) and terminal alkynes via Cu(OAc)2·H2O/2,2′‐biimidazole catalyzed in DMF at 60°C and subsequent additive cyclization produced substituted 3‐methyleneisoindolin‐1‐ones in good to excellent yields.