A counteranion triggered arylation strategy using diaryliodonium fluorides
作者:L. Chan、A. McNally、Q. Y. Toh、A. Mendoza、M. J. Gaunt
DOI:10.1039/c4sc02856b
日期:——
A mild and transition metal-free counteranion triggered arylation strategy has been developed using diaryliodonium fluorides.
已开发出一种使用二芳基碘氟化物的温和和过渡金属自由的对阴离子触发芳基化策略。
Copper-Catalyzed Formal Dehydrogenative Coupling of Carbonyls with Polyfluoroarenes Leading to β-C–H Arylation
作者:Weilong Xie、Dongwook Kim、Sukbok Chang
DOI:10.1021/jacs.0c10904
日期:2020.12.9
We herein communicate a formal dehydrogenativecoupling of carbonyls with polyfluoroarenes enabled by Cu catalysis. Silyl enol ethers initially prepared from carbonyls are postulated to undergo the copper-mediated oxidative dehydrogenativecoupling with polyfluoroarenes via a radicalpathway. Including cyclic and linear ketones, aldehydes, and esters, a broad range of β-aryl carbonyl products were
我们在此交流了通过 Cu 催化实现的羰基与多氟芳烃的正式脱氢偶联。假设最初由羰基化合物制备的甲硅烷基烯醇醚通过自由基途径与多氟芳烃进行铜介导的氧化脱氢偶联。包括环状和线性酮、醛和酯在内,以高区域和立体选择性和优异的官能团耐受性有效地获得了广泛的 β-芳基羰基产物。
Regioselective Alkylpolyfluoroarylation of Styrenes by Copper-Catalyzed C(sp<sup>3</sup>)–H and C(sp<sup>2</sup>)–H Double Activation
作者:Chenggong Zheng、Fangpei Yan、Yaomei Liu、Rui Chen、Kaiting Zheng、Hua Xiao、Xiao-Xuan Li、Yi-Si Feng、Shilu Fan
DOI:10.1021/acs.orglett.2c02197
日期:2022.7.29
A novel dehydrogenative dicarbofunctionalization of vinyl arenes with polyfluoroarenes and unactivated alkanes enabled by copper catalysis has been accomplished under mild conditions. This transformation provides a regioselective route to highly functionalized polyfluoroaryl compounds that occur as structural scaffolds in a variety of pharmaceuticals and materials. Preliminary mechanistic studies indicate
Palladium-catalyzed enantioselective dominoHeck/intramolecular C–H functionalization reaction, as a valuable strategy for creating molecular diversity, has remained a prominent challenge. Here, we describe a Pd/XuPhos catalyst for asymmetric dominoHeck/intermolecular C–H alkylation of unactivated alkenes with diverse polyfluoro- and heteroarenes in a highly chemo- and enantioselective manner. This
Reaction of polyfluorinated chalcones with guanidine
作者:E. A. Borodina、N. A. Orlova、Yu. V. Gatilov、O. I. Sal’nikova
DOI:10.1134/s1070428015120143
日期:2015.12
Reactions of polyfluorinated chalcones with guanidine in the presence of bases are accompanied by elimination of the polyfluorophenyl group. 3-(Pentafluorophenyl)-1-phenylprop-2-en-1-one and its derivatives reacted with guanidine under basic conditions to give 4-phenylpyrimidin-2-amine, polyfluorobenzenes, and Michael adducts, 3-(2-amino-4-phenylpyrimidin-5-yl)-3-(4-R-2,3,5,6-tetrafluorophenyl)-1-phenylpropan-1-ones. 1-(Pentafluorophenyl)-3-phenylprop-2-en-1-one and 1,3-bis(pentafluorophenyl)prop-2-en-1-one were converted into cinnamic acid derivatives whose reaction with guanidine afforded 2-amino-6-aryl-5,6-dihydropyrimidin-4(1H)-ones.