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
Supported-Pd catalyzed carbonylative synthesis of phthalimides and isoindolinones using Oxalic acid as in situ CO surrogate with 2-iodobenzamides and 2-iodobenzylanilines in ppm-level catalyst loading
作者:Shankar Ram、Pushkar Mehara、Ashish Kumar、Ajay Kumar Sharma、Arvind Singh Chauhan、Ajay Kumar、Pralay Das
DOI:10.1016/j.mcat.2022.112606
日期:2022.9
Pd/C-Catalyzed Homocoupling Reaction for the Synthesis of
Symmetrical Biaryl Diamides
Pd/C was found to be an efficient and convenient metal catalyst in the homocoupling reaction for the synthesis of symmetrical biaryl diamides. The catalyst systemPd/C–KOAc showed high catalytic activity, and a variety of symmetrical biaryl diamides were conveniently synthesized from 2-halo- N -phenylbenzamides in moderate to good yields.
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.