Silver-Catalyzed Decarboxylative Radical Addition/Cyclization of α,α-Difluoroarylacetic Acids with Acrylamides To Synthesize Difluorinated Oxindoles
作者:Yin-Long Li、Ji-Bo Wang、Xue-Lin Wang、Yang Cao、Jun Deng
DOI:10.1002/ejoc.201701248
日期:2017.11.2
silver-catalyzed decarboxylative radical addition/cyclizationreaction of α,α-difluoroarylacetic acids and acrylamides has been disclosed. The method provides a highly attractive approach to synthesize a series of difluorinated oxindoles that contain variousfunctional groups in moderate to good yields under mild conditions. Moreover, experimental studies reveal that the CF2 group of the α,α-difluoroarylacetic
Metal-free, oxidative decarboxylation of aryldifluoroacetic acid with the formation of the ArS–CF<sub>2</sub> bond
作者:Yifang Zhang、Qian Wang、Yi Peng、Haiying Gong、Hua Chen、Hongmei Deng、Jian Hao、Wen Wan
DOI:10.1039/d1ob01165k
日期:——
A metal-free, oxidative decarboxylative reaction of aryldifluoroacetic acids with diaryl disulfides or thiols under mild reaction conditions has been developed. This is an efficient and straightforward radical cross-coupling method for the synthesis of diverse aryldifluoromethylthio ethers in moderate to excellent yields.
Ag-Catalyzed minisci C–H difluoromethylarylation of N-heteroarenes
作者:Xiaojuan Xie、Yifang Zhang、Jian Hao、Wen Wan
DOI:10.1039/c9ob02586c
日期:——
A mild silver-catalyzed decarboxylative C–H difluoromethylarylation of electron-deficient N-heteroarenes.
一种温和的银催化脱羧C-H二氟甲基芳基化反应,适用于电子亏缺的N-杂环烃。
Controlling the Cleavage of Carbon–Carbon Bonds To Generate α,α-Difluorobenzyl Carbanions for the Construction of Difluoromethylbenzenes
作者:Hari R. Khatri、Changho Han、Erica Luong、Xiaoliang Pan、Amna T. Adam、Maali D. Alshammari、Yihan Shao、David A. Colby
DOI:10.1021/acs.joc.9b01595
日期:2019.9.20
The initiating reagent is potassium carbonate, which represents an improvement over existing protocols that require a strong base. Fragmentation studies across substituted arenes and heteroarenes were conducted along with computational analyses to elucidate reactivity trends. Furthermore, the mildly generated α,α-difluorobenzyl carbanions from electron-deficient aromatics and heteroaromatic rings can