Ligand-Free Bioinspired Suzuki-Miyaura Coupling Reactions using Aryltrifluoroborates as Effective Partners in Deep Eutectic Solvents
作者:Giuseppe Dilauro、Sergio Mata García、Donato Tagarelli、Paola Vitale、Filippo M. Perna、Vito Capriati
DOI:10.1002/cssc.201801382
日期:2018.10.11
Pd‐catalyzed Suzuki–Miyaura cross‐coupling between (hetero)aryl halides (Cl, Br, I) and versatile, moisture‐stable mono‐ and bifunctional potassium aryltrifluoroborates proceeded efficiently and chemoselectively in air and under generally mild conditions; a catalyst loading as low as 1 mol % combined with Na2CO3 as a base in choline chloride/glycerol (1:2) deep eutectic solvent (DES) was used as a
钯催化的(杂)芳基卤化物(Cl,Br,I)与通用的,湿气稳定的单和双官能芳基三氟硼酸钾之间的钯催化的Suzuki-Miyaura交叉偶联在空气中和一般在温和的条件下有效且化学选择性地进行;与Na 2 CO 3结合的催化剂负载量低至1 mol%作为氯化胆碱/甘油(1:2)中的碱,低共熔溶剂(DES)被用作可持续和对环境负责的介质。催化剂,碱和DES可以轻松且成功地回收多达六次,而E因子低至8.74。提供了有价值的联芳基和三联苯衍生物,产率高达98%。比较和讨论了50多个反应。该方法已用于非甾体抗炎药Felbinac和Diflunisal的合成。
Green Synthesis of Pd Nanoparticles Supported on Magnetic Graphene Oxide by Origanum vulgare Leaf Plant Extract: Catalytic Activity in the Reduction of Organic Dyes and Suzuki–Miyaura Cross-Coupling Reaction
作者:Neda Seyedi、Kazem Saidi、Hassan Sheibani
DOI:10.1007/s10562-017-2220-4
日期:2018.1
the biosynthesis of palladiumnanoparticles on modifiedgrapheneoxide by Origanum vulgare leaf plant extract have been developed by our group. The prepared magnetically nanocatalyst was characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, vibrating sample magnetometer (VSM) and Fourier transform infrared spectroscopy. The heterogeneous catalytic system was
Encapsulation of palladium chloride using 2-formylbenzoic acid supported by Fe<sub>3</sub>
O<sub>4</sub>
nanoparticles modified with SiO<sub>2</sub>
and propylamine, its characterization and its application for Suzuki coupling reaction
Fe3O4@SiO2(CH2)3N―CH―Ar@Pd(0), was simply prepared and characterized using various techniques. The catalytic activity of this nanocatalyst was evaluated via the Suzuki–Miyaura cross‐couplingreaction of aryl halides with phenylboronic acid under various experimental conditions such as kind of base, solvent and temperature. This nanocatalyst is completely magnetically recoverable because of the superparamagnetic
制备了可磁分离的非均相纳米催化剂Fe 3 O 4 @SiO 2(CH 2)3 N-CH-Ar @ Pd(0)。通过在各种实验条件下(例如碱,溶剂和温度),芳基卤化物与苯基硼酸的Suzuki-Miyaura交叉偶联反应评估了这种纳米催化剂的催化活性。由于Fe的超顺磁性行为,这种纳米催化剂是完全可磁回收的,并且可以持续的选择性和活性重复使用。
POLYMERIZABLE COMPOUNDS AND THE USE THEREOF IN LIQUID-CRYSTAL DISPLAYS
申请人:MERCK PATENT GMBH
公开号:US20170121606A1
公开(公告)日:2017-05-04
The present invention relates to polymerizable compounds, to processes and intermediates for the preparation thereof, to liquid-crystal (LC) media comprising them, and to the use of the polymerizable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment type, or a stabilizers in LC media and LC displays.
POLYMERISABLE COMPOUNDS AND THE USE THEREOF IN LIQUID-CRYSTAL DISPLAYS
申请人:MERCK PATENT GMBH
公开号:US20220127532A1
公开(公告)日:2022-04-28
The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, to liquid-crystal (LC) media comprising them, and to the use of the polymerisable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment (PS, PSA) and self-aligning (SA) type.