Trineopentylphosphine: A Conformationally Flexible Ligand for the Coupling of Sterically Demanding Substrates in the Buchwald–Hartwig Amination and Suzuki–Miyaura Reaction
作者:Steven M. Raders、Jane N. Moore、Jacquelynn K. Parks、Ashley D. Miller、Thomas M. Leißing、Steven P. Kelley、Robin D. Rogers、Kevin H. Shaughnessy
DOI:10.1021/jo400435z
日期:2013.5.17
palladium provides a highly effective catalyst for the Buchwald–Hartwig coupling of sterically demanding aryl bromides and chlorides with stericallyhindered aniline derivatives. Excellent yields are obtained even when both substrates include 2,6-diisopropyl substituents. Notably, the reaction rate is inversely related to the steric demand of the substrates. X-ray crystallographic structures of Pd(TNpP)2,
三叔戊基膦(TNpP)与钯的结合为空间受限的芳族溴化物和氯化物与空间受阻的苯胺衍生物的布赫瓦尔德-哈特维格偶联提供了一种高效的催化剂。即使两个底物都包含2,6-二异丙基取代基,也可获得优异的产率。值得注意的是,反应速率与底物的空间需求成反比。Pd(TNpP)2,[Pd(4- t -Bu-C 6 H 4)(TNpP)(μ-Br)] 2和[Pd(2-Me-C 6 H 4)的X射线晶体结构(TNpP)(μ-Br)] 2被报道。这些结构表明,TNpP配体的构象柔韧性在允许催化剂偶联受阻底物方面起着关键作用。Pd / TNpP系统对受阻芳基溴化物的Suzuki偶联也显示出良好的活性。
An Efficient and Reusable Palladium Catalyst Supported on a Rasta Resin for Suzuki-Miyaura Cross-Couplings
作者:Carine Diebold、Jean-Michel Becht、Jinni Lu、Patrick H. Toy、Claude Le Drian
DOI:10.1002/ejoc.201101075
日期:2012.2
A short and efficient synthesis of a heterogeneous palladiumcatalystsupported on a rastaresin bearing diphenylphosphanyl ligands is reported. This catalyst was used successfully for Suzuki–Miyaura reactions of aryl bromides in the presence of only 0.25 milli-equiv. of supportedpalladium. The catalyst was reused several times with no loss of efficiency, and the amount of palladium leached in the
报道了一种在带有二苯基膦基配体的 rasta 树脂上负载的多相钯催化剂的短而有效的合成。该催化剂在仅 0.25 毫当量的情况下成功用于芳基溴化物的 Suzuki-Miyaura 反应。支持的钯金。该催化剂可重复使用多次,效率没有损失,反应介质中浸出的钯量极低(<初始量的 1%)。
C–C coupling formation using nitron complexes
作者:Mehmet Sevim、Serdar Batıkan Kavukcu、Armağan Kınal、Onur Şahin、Hayati Türkmen
DOI:10.1039/d0dt02937h
日期:——
under mild conditions. These complexes were able to perform this catalytic transformation in a short time with low catalyst and base amounts under an air atmosphere. Also, the PdII–nitron complexes (6–9) were applied in the Suzuki–Miyaura C–C coupling reaction and these complexes successfully initiated this reaction in a short time (30 minutes) using the H2O/2-propanol (1.5 : 0.5) solvent system. The
一系列的Ru II(1),铑III(2),IR III(3,4),IR我(5)和Pd II(6-9制备和表征通过) '瞬间卡宾'硝酮的复合物1 H-和13 C-NMR,FT-IR和元素分析。配合物1-4和6的分子结构通过X射线衍射研究确定。在酮与醇的α(α)-烷基化反应中,通过乙胺(α-)烷基化反应评价了配合物(1-9)的催化活性。温和条件下的借用氢战略。这些络合物能够在短时间内在空气气氛下以低催化剂和碱量进行这种催化转化。同样,Pd II-硝基络合物(6-9)用于Suzuki-Miyaura C-C偶联反应,这些络合物使用H 2 O / 2-丙醇(30分钟)在短时间内成功引发了该反应。1.5:0.5)溶剂系统。DFT计算表明,对于该机理,Pd 0 / II / 0途径更为可取。
Activation of aryl chlorides in water for Suzuki coupling with a hydrophilic salen-Pd(II) catalyst
作者:Nasifa Shahnaz、Amlan Puzari、Bidisha Paul、Pankaj Das
DOI:10.1016/j.catcom.2016.08.010
日期:2016.11
simple water-soluble palladium Schiff-base catalyst for Suzuki-Miyaura reactions of aryl halides with arylboronic acids. The reactions could be performed in neat water with aryl bromides and iodides at room temperature and with aryl chlorides at 100 °C. Good-to-excellent yields of cross-coupling products were obtained with a diverse range of aryl halides including heteroarylhalides. Interestingly, the
Green conditions for the Suzuki reaction using microwave irradiation and a new HNT-supported ionic liquid-like phase (HNT-SILLP) catalyst
作者:Marina Massaro、Serena Riela、Giuseppe Lazzara、Michelangelo Gruttadauria、Stefana Milioto、Renato Noto
DOI:10.1002/aoc.3114
日期:2014.4
A new catalytic system based on modified halloysite nanotubes was employed in the Suzukireaction under microwaveirradiation. A set of solvents, times and bases was screened and the best experimental conditions were obtained when the reactions were carried out for 10 min in water–ethanol at 120 °C in presence of K2CO3 as base. Good recyclability was observed. The new catalytic system was employed