[EN] SUBSTITUTED AROMATIC AMINES FOR USE IN ORGANIC ELECTROLUMINESCENT DEVICES<br/>[FR] AMINES AROMATIQUES SUBSTITUÉES DESTINÉES À ÊTRE UTILISÉES DANS DES DISPOSITIFS ÉLECTROLUMINESCENTS ORGANIQUES
申请人:MERCK PATENT GMBH
公开号:WO2019115577A1
公开(公告)日:2019-06-20
The present application relates to a specific fluorene derivative, to its use in an electronic device and to an electronic device comprising said fluorene derivatives. Further, the present application relates to a process for the preparation of such fluorene compounds and to oligomers, polymers or dendrimers as well as formulations or compositions comprising one or more of said fluorene compounds.
Green and sustainable palladium nanomagnetic catalyst stabilized by glucosamine‐functionalized Fe
<sub>3</sub>
O
<sub>4</sub>
@SiO
<sub>2</sub>
nanoparticles for Suzuki and Heck reactions
Mizoroki-Heck. Various aryl halides were coupled with arylboronicacid (Suzuki cross-coupling reaction) and olefins (Heck reactions) under the green conditions to provide corresponding products in high to excellent yields. Interestingly, the catalyst can be easily isolated from the reaction media by magnetic decantation and can subsequently be applied for consecutive reaction cycles (at least seven times)
一种由葡糖胺功能化磁性 Fe 3 O 4 @SiO 2稳定的新型磁性和多相钯基催化剂合成了纳米颗粒。该策略依赖于葡糖胺与氰尿酰氯官能化磁性纳米粒子的共价键合,然后与钯络合。通过FT-IR、XRD、DLS、FE-SEM、TEM、ICP、UV-Vis、TGA、VSM和EDX完全确定了磁性纳米催化剂的结构。所得结果证实,由固定在磁性载体上的葡糖胺稳定的钯纳米颗粒在 Suzuki-Miyaura 和 Mizoroki-Heck 的交叉偶联反应中表现出高活性。各种芳基卤化物在绿色条件下与芳基硼酸(Suzuki 交叉偶联反应)和烯烃(Heck 反应)偶联,以高产率到优异的产率提供相应的产品。有趣的是,
Mechanochemical Solvent‐Free Suzuki–Miyaura Cross‐Coupling of Amides via Highly Chemoselective N−C Cleavage
The first mechanochemical strategy for highlychemoselective, solvent-free palladium-catalyzed cross-coupling of amides by N−C bond activation is reported. The protocol advances the biorelevant amide bond cross-coupling manifold to solid-state solventless cross-coupling methods.
Mechanochemical Synthesis of Ketones via Chemoselective Suzuki–Miyaura Cross-Coupling of Acyl Chlorides
作者:Jin Zhang、Pei Zhang、Yangmin Ma、Michal Szostak
DOI:10.1021/acs.orglett.2c00519
日期:2022.4.1
The direct synthesis of ketones via acyl Suzuki–Miyaura cross-coupling of widely available acyl chlorides is a central transformation in organic synthesis. Herein, we report the first mechanochemical solvent-free method for highly chemoselective synthesis of ketones from acyl chlorides and boronic acids. This acylation reaction is conducted in the solid state, in the absence of potentially harmful
Suzuki cross-coupling of various arenediazoniumtetrafluoroborates and arylboronicacids is described for the first time in the presence of a catalytic amount of Pd(OAc)2, at ambient temperature and in the absence of both base and phosphine ligand.