We report a facile and economical synthesis of α-fluoroacrylic acids via direct electrochemical defluorinative carboxylation of gem-difluoroalkenes with CO2. By using a platinum plate as the working cathode and a cheap nickel plate as the anode in a user-friendly undivided cell under constant current conditions, the reactions proceed smoothly under room temperature, without the use of expensive transition
The reactions of aromaticketones with trialkyl(trifluorovinyl)silanes in the presence of fluoride ions were studied. The conditions for the selective addition of trialkyl(trifluorovinyl)silanes to the carbonyl function of aromaticketones in the presence of cesium fluoride and absence of any solvents to form the trifluorovinyl containing “silylated” alcohols have been worked out. The analogous reactions
Stereospecific synthesis of monofluoroalkenes and their deuterated analogues via Ag-catalyzed decarboxylation
作者:Xinyuan Liu、Fuxing Shi、Chaochao Jin、Binbin Liu、Ming Lei、Jiajing Tan
DOI:10.1016/j.jcat.2022.08.008
日期:2022.9
bioactivity. Although the preparation of aryl and aliphatic fluorides have been extensively investigated, alkenyl fluoride synthesis remains to be under-developed due to challenges associated with stereoselectivity control. Herein, we report a practical method for stereospecificsynthesis of terminal alkenyl fluorides, and especially their deuterated analogues using an Ag-catalyzed decarboxylative protonation/deuteration
氟化有机分子已在药物化学中得到广泛应用,因为氟的掺入通常会改善代谢稳定性、亲脂性和生物活性。尽管芳基和脂肪族氟化物的制备已被广泛研究,但由于与立体选择性控制相关的挑战,烯基氟化物的合成仍有待开发。在此,我们报告了一种使用银催化脱羧质子化/氘化策略立体定向合成末端烯基氟化物的实用方法,尤其是它们的氘代类似物。广泛的底物范围、放大实验和产品衍生化证明了合成效用。DFT 计算将双分子 NMP 与 Ag 的配位识别为有利模式,阐明了机理途径,
Stereoselective synthesis of monofluoroalkenyl silanes via copper-catalyzed decarboxylative silylation of α-fluoroacrylic acids
A copper-catalyzed decarboxylative/dehydrogenative cross-coupling reaction of α-fluoroacrylicacids with silanes has been developed. A wide range of α-fluoroacrylicacids containing many critical functional groups reacted smoothly, giving desired monofluoroalkenyl silanes with excellent E-stereoselectivity. This protocol provides a convenient strategy for accessing monofluoroalkenyl silanes, without
Herein, a practical and efficient method for synthesizing monofluoroalkenyl phosphine oxides via photoinduceddecarboxylative/dehydrogenative coupling of α-fluoroacrylicacids with phosphine oxides and phosphonates has been developed. Various α-fluoroacrylicacids and P(O)H compounds containing relevant functional groups, including tetrafluorobenzene and pentafluorobenzene, were converted into corresponding