describes the chemoselective coupling of polyfluoroarenes with aryl germanes in the presence of aromatic C-I, C-Br, C-Cl, C-OTf and C-SiMe3 groups, as well as demonstrates the further downstream diversification to give richly functionalized and highly fluorinated polyarenes. The strategy relies on an in situ Umpolung of the FnArH, followed by selective Au(I)/Au(III)-catalyzed coupling with electron-poor or
Homolytic reactions of perfluoroaromatic compounds. Part II. Reactions of perfluorobenzoyl peroxide with aromatic compounds
作者:P. H. Oldham、Gareth H. Williams
DOI:10.1039/j39700001260
日期:——
Perfluorobenzoyl peroxide decomposes in benzene and in nitrobenzene at 80° to give mainly pentafluorobiaryls and pentafluorobenzoic acid. In hexafluorobenzene the main product is a high-boiling residue, and in chloro- and bromo-benzene pentafluorobenzoic acid and phenyl pentafluorobenzoate are formed. The latter product must arise by benzoyloxylation of the halogenobenzenes at the 1-position. The results
Transition‐Metal‐Free Coupling of Polyfluorinated Arenes and Functionalized, Masked Aryl Nucleophiles
作者:Lucie Finck、Martin Oestreich
DOI:10.1002/chem.202101731
日期:2021.8.2
coupling of sufficiently electron-deficient fluorinatedarenes and functionalized N-aryl-N’-silyldiazenes as masked aryl nucleophiles is reported. The fluoride-promoted transformation involves the in situ generation of the aryl nucleophile decorated with various sensitive functional groups followed by a stepwise nucleophilic aromatic substitution (SNAr). These reactions typically proceed at room temperature
报道了足够缺电子的氟化芳烃和官能化的N-芳基-N'-甲硅烷基二氮烯作为掩蔽的芳基亲核试剂的化学选择性 C(sp 2 )-C(sp 2 ) 偶联。氟化物促进的转化涉及原位生成用各种敏感官能团修饰的芳基亲核试剂,然后逐步进行亲核芳族取代 (S N Ar)。这些反应通常在室温下在几分钟内进行。这种催化过程允许两个偶联伙伴的功能化,以良好的产率提供高度氟化的联芳基化合物。
Copper-catalyzed cross-coupling of arenediazonium tetrafluoroborates with polyfluoroarenes
作者:Xingyi Zhu、Feng Li、Weike Su
DOI:10.1016/j.tetlet.2012.12.110
日期:2013.3
cross-coupling reaction of arenediazonium tetrafluoroborates with polyfluoroarenes is briefly described. It has advantages of high reaction efficiency, excellent functional group compatibility, mild reaction conditions, short reaction time, and inexpensive ligand. This reaction also can be performed as a one-pot process from anilines omitting isolation of arenediazonium tetrafluoroborates. It has been
Pd-catalyzed direct arylation of electron-deficient polyfluoroarenes with aryliodine(III) diacetates
作者:Zhengjiang Fu、Qiheng Xiong、Wenbiao Zhang、Zhaojie Li、Hu Cai
DOI:10.1016/j.tetlet.2014.11.033
日期:2015.1
polyfluoroarenes with readily available aryliodine(III) diacetates was developed with moderate to good yields. The process exhibited good functional tolerance with respect to methyl, methoxy, bromo, chloro, trifluoromethyl, cyano, and aldehyde groups. Mechanistic studies revealed this coupling involved in situ generation of aryl iodide from heating-promoted decomposition of aryliodine(III) diacetate, followed by