(Fluoroorgano)fluoroboranes and -fluoroborates I: synthesis and spectroscopic characterization of potassium fluoroaryltrifluoroborates and fluoroaryldifluoroboranes
摘要:
A convenient preparation of K[ArBF3] (Ar= 2-C6H4F, 3-C6H4F, 4-C6H4F, 2,6-C6H3F2, 3,5-C6H3F2, 2,4,6-C6H2F3, 3,4,5-C6H2F3, 2,3,4,5-C6HF4 and C6F5) is offered and the IR and multinuclear NMR spectra of these salts are reported. Treatment of the trifluoroborate salts with BF3 in chlorocarbon solvents provides an easy synthetic route to the corresponding aryldifluoroboranes ArBF2. The multinuclear NMR spectra of ArBF2 are presented. The electron substituent effect of the [-BF3](-)-group shows this substituent as one of the strongest sigma-electron donors, while its pi-electron influence is negligible (sigma(I) = - 0.32, sigma(R) = - 0.07). (C) 2000 Elsevier Science S.A. All rights reserved.
A new application of (polyfluoroorgano)trifluoroborate salts: the palladium-catalysed cross-coupling reaction with substituted benzenediazonium tetrafluoroborates
作者:Hermann-Josef Frohn、Nicolay Yu. Adonin、Vadim V. Bardin、Vladimir F. Starichenko
DOI:10.1016/s0022-1139(02)00157-4
日期:2002.10
influence of the number and the position of the fluorine atoms in the (polyfluorophenyl)trifluoroborate salts on the reactivity in the coupling reaction was elucidated. In addition to (polyfluorophenyl)trifluoroborate salts, the cross-coupling was expanded to a first example of a perfluoroalkenyl reagent. K[CF2CFBF3] reacted with [4-FC6H4N2][BF4] and formed CF2CF–C6H4F-4.
首次(多氟有机)三氟硼酸盐,即K [C 6 F 5 BF 3 ],K [C 6 HF 4 BF 3 ](所有三种异构体),K [3,4,5-C 6 H 2 F 3 BF 3 ]和K [CF 2 CFBF 3 ]的主要应用于作为试剂用于钯催化的交叉偶联反应。由K [C 6 H 5– n F n获得了一系列多氟联苯C 6 H 5– n F n –C 6 H 4 X-4'BF 3 ]和底物[4-XC 6 H 4 N 2 ] [BF 4 ]在Pd催化剂的存在下。阐明了(多氟苯基)三氟硼酸盐中氟原子的数目和位置对偶联反应中反应性的影响。除了(聚氟苯基)三氟硼酸盐以外,交叉偶联扩展为全氟烯基试剂的第一个实例。K [CF 2 CFBF 3 ]与[4-FC反应6 ħ 4 Ñ 2 ] [BF 4 ]和形成CF 2 CF-C 6 H ^ 4 F-4。
Four-coordinate triarylborane synthesis <i>via</i> cascade B–Cl/C–B cross-metathesis and C–H bond borylation
作者:Kai Yang、Guan Zhang、Qiuling Song
DOI:10.1039/c8sc02281j
日期:——
We herein describe a tandem highly selective B–Cl/C–B cross-metathesis of two same or different arylboranes and C–H bond borylation to synthesize four-coordinate triarylboranes with broad substrate scope.
Nickel/TiO2-catalyzed Suzuki–Miyaura cross-coupling of arylboronic acids with aryl halides in MeOH/H2O
作者:Mona Hosseini-Sarvari、Abdulhamid Dehghani
DOI:10.1007/s00706-023-03052-9
日期:2023.4
The catalyst structure was investigated by XRD, SEM, FT–IR, and N2 adsorption–desorption isotherm analysis and then successfully applied for the synthesis of biaryl compounds through a Suzuki–Miyauracross-coupling reaction. A wide variety of biaryl compounds were successfully synthesized through the developed catalytic process in MeOH/H2O, and all desired biaryl compounds were obtained in good to
Ni/TiO 2纳米粒子被合成为可分离和可重复使用的纳米催化剂。通过 XRD、SEM、FT-IR 和 N 2吸附-脱附等温线分析研究了催化剂结构,然后通过 Suzuki-Miyaura 交叉偶联反应成功应用于联芳基化合物的合成。通过在 MeOH/H 2 O 中开发的催化工艺成功合成了多种联芳基化合物,并且在相对较短的反应时间后,所有所需的联芳基化合物都以良好到极好的产率 (60–100%) 获得。幸运的是,催化剂可以很容易地回收并重复使用至少五次,而不会对产品的收率产生任何重大影响。 图形概要
(Fluoroorgano)fluoroboranes and -fluoroborates I: synthesis and spectroscopic characterization of potassium fluoroaryltrifluoroborates and fluoroaryldifluoroboranes
作者:H.-J. Frohn、H. Franke、P. Fritzen、V.V. Bardin
DOI:10.1016/s0022-328x(99)00690-7
日期:2000.3
A convenient preparation of K[ArBF3] (Ar= 2-C6H4F, 3-C6H4F, 4-C6H4F, 2,6-C6H3F2, 3,5-C6H3F2, 2,4,6-C6H2F3, 3,4,5-C6H2F3, 2,3,4,5-C6HF4 and C6F5) is offered and the IR and multinuclear NMR spectra of these salts are reported. Treatment of the trifluoroborate salts with BF3 in chlorocarbon solvents provides an easy synthetic route to the corresponding aryldifluoroboranes ArBF2. The multinuclear NMR spectra of ArBF2 are presented. The electron substituent effect of the [-BF3](-)-group shows this substituent as one of the strongest sigma-electron donors, while its pi-electron influence is negligible (sigma(I) = - 0.32, sigma(R) = - 0.07). (C) 2000 Elsevier Science S.A. All rights reserved.