Synthesis of α-Fluoroimines by Copper-catalyzed Reaction of Diarylacetylenes and <i>N</i>-Fluorobenzenesulfonimide
作者:Shu Jan Yip、Tetsushi Yoshidomi、Kei Murakami、Kenichiro Itami
DOI:10.1246/cl.171097
日期:2018.3.5
unsaturated bonds with fluorinating reagents has been regarded as an efficient route to vic-difunctional organic fluorides. Here we report a copper-catalyzedsynthesis of α-fluoroimines from diarylacetylenes and N-fluorobenzenesulfonimide. Mechanistically, the reaction initiates from the generation of imidyl radical, which reacts with alkyne to give the product. The resulting α-fluoroimine can easily be
A palladium catalyzed Negishi-type α-arylation of α-fluoroketones with electron-rich and electron-deficient aryl halides or phenyl triflate has been developed. This direct mono-α-arylation method generate a variety of ternary α-aryl-α-monofluoroketones easily in good to excellent yields using XPhos as ligand and Cs2CO3 as mild base.
已经开发了钯催化的α-氟代酮的Negishi型α-芳基化反应,该反应具有富电子和电子不足的芳基卤化物或三氟甲磺酸苯酯。使用XPhos作为配体和Cs 2 CO 3作为温和的碱,这种直接的单α-芳基化方法可以轻松地以良好或优异的产率生成各种三元α-芳基-α-单氟酮。
Preparation and Functionalization of Mono‐ and Polyfluoroepoxides via Fluoroalkylation of Carbonyl Electrophiles
作者:Shuo Guo、Wei Sun、Joseph W. Tucker、Kevin D. Hesp、Nathaniel K. Szymczak
DOI:10.1002/chem.202203578
日期:2023.2.16
2-addition and ring closure reactions between fluoroalkyl anion synthons and carbonyl electrophiles to form fluorinated epoxides. We clarify the generality of the reaction sequence by examining the fluoroalkyl requiremements. This approach enabled access to unique compounds that can be diversified through either ringopening or ringopening defluorinative functionalization reactions.
Palladium-catalyzed direct α-arylation of α-fluoroketones: A straightforward route to α-fluoro-α-arylketones
作者:Chen Guo、Ruo-Wen Wang、Yong Guo、Feng-Ling Qing
DOI:10.1016/j.jfluchem.2011.08.004
日期:2012.1
The palladium-catalyzed direct alpha-arylation of both open-chain and cyclic alpha-fluoroketones by using P(o-tolyl)(3) or RuPhos as ligand and K3PO4 center dot 3H(2)O as mild base has been developed. This method allows a variety of quaternary alpha-aryl-alpha-fluoroketones to be easily prepared. (C) 2011 Elsevier B.V. All rights reserved.
EWG assisted nucleophilic fluorination using PPHF: a strategy for the synthesis of 1,2,2-triaryl-2-fluoroethanones
作者:Anil Kumar、Anil K. Pal、Rishi D. Anand、Tej V. Singh、Paloth Venugopalan
DOI:10.1016/j.tet.2011.08.083
日期:2011.10
The nucleophilic fluorination of 1,2,2-triaryl-2-hydroxyethanones by fluoride ion has been carried out usingpyridiniumpoly(hydrogenfluoride) (PPHF) to give 1,2,2-triaryl-2-fluoroethanones in fairly good yield. The presence of electron withdrawing group (EWG), such as –COAr at the carbon bearing hydroxyl group facilitates such nucleophilic fluorination. The intermediacy of bridged oxiranyl ion and