Palladium Nanoparticles Immobilized on Nanosilica Triazine Dendritic Polymer (Pd np -nSTDP) as Catalyst in the Synthesis of Mono-, Di-, and Trisulfides through C–S Cross-Coupling Reactions
A wide variety of diaryl sulfides has been synthesized in excellent yields via C–S cross-couplings of aryl/heteroaryl halides with aromatic/heteroaromatic thiols in the presence of palladiumnanoparticlesimmobilized on nanosilica triazinedendriticpolymer (Pd np -nSTDP) as a reusablecatalyst under thermal conditions and microwave irradiation. Pd np -nSTDP also showed excellent catalytic activity
Development of a New Variant of the Migita Reaction for Carbon−Sulfur Bond Formation Used in the Manufacture of Tetrahydro-4-[3-[4-(2-methyl-1<i>H</i>-imidazol-1-yl)phenyl]thio]phenyl-2<i>H</i>-pyran-4-carboxamide
作者:Timothy Norris、Kyle Leeman
DOI:10.1021/op800098a
日期:2008.9.19
Palladium-catalyzed carbon−sulfur bond formation using modified Migita reaction conditions was explored and applied to the synthesis of a former antiasthma drug candidate, tetrahydro-4-[3-[4-(2-methyl-1H-imidazol-1-yl)phenyl]thio]phenyl-2H-pyran-4-carboxamide (5). The reaction was developed into a general method for thioaryl halidecross-coupling, and a specific example of its use to synthesize a key
Palladium nanoparticles immobilized on a nano-silica triazine dendritic polymer: a recyclable and sustainable nanoreactor for C–S cross-coupling
作者:Amir Landarani-Isfahani、Iraj Mohammadpoor-Baltork、Valiollah Mirkhani、Majid Moghadam、Shahram Tangestaninejad、Hadi Amiri Rudbari
DOI:10.1039/d0ra00719f
日期:——
catalytic processes as efficient nanoreactors. Therefore, we herein report an environmentally attractive strategy and highly efficient route for the synthesis of a wide variety of diaryl sulfides using palladiumnanoparticles immobilized on a nano-silica triazine dendritic polymer (Pdnp-nSTDP) as a nanoreactor. In this manner, different diaryl or aryl heteroaryl sulfides and bis(aryl/heteroarylthio)ben
Palladium Complex Immobilized on Magnetic Nanoparticles Modified with 2-Aminopyridine Ligand: A Novel and Efficient Recoverable Nanocatalyst for C–S and C–Se Coupling Reactions
作者:Xiaoqing Xu、Weiqi Wang、Lu Lu、Jingzheng Zhang、Jia Luo
DOI:10.1007/s10562-021-03908-x
日期:2022.10
including FT-IR, SEM, TEM, EDX, TGA, XRD, VSM and ICP-OES techniques. The Fe3O4@SiO2/2-aminopyridine-Pd(II) nanocomposite was utilized under mild and eco-friendly conditions in C–S and C–Se coupling reactions to afford a vast variety of diaryl sulfides and diaryl selenides with good to excellent yields. This heterogeneous palladium catalyst can be magnetically separated and reused for at least 7 consecutive
通过将钯 (II) 配合物固定在 2-氨基吡啶修饰的磁性纳米粒子表面,制备了一种新型、通用且高效的磁性可回收钯纳米催化剂 [Fe 3 O 4 @SiO 2 /2-氨基吡啶-Pd(II)]配体。Fe 3 O 4 @SiO 2 /2-氨基吡啶-Pd(II)纳米复合材料的结构通过一系列光谱技术表征,包括FT-IR、SEM、TEM、EDX、TGA、XRD、VSM和ICP -OES 技术。Fe 3 O 4 @SiO 2/2-氨基吡啶-Pd(II) 纳米复合材料在温和且环保的条件下用于 C-S 和 C-Se 偶联反应,以提供各种各样的二芳基硫化物和二芳基硒化物,产率很高。这种多相钯催化剂可以磁性分离并重复使用至少 7 次连续试验,而不会降低活性。 图形概要
Assembly of (hetero)aryl thioethers <i>via</i> simple nucleophilic aromatic substitution and Cu-catalyzed coupling reactions with (hetero)aryl chlorides and bromides under mild conditions
作者:Weiqi Liu、Xinghao Jin、Dawei Ma
DOI:10.1039/d3gc02066e
日期:——
requirement of higher reaction temperatures for an SNAr reaction between thiols and less reactive electron-poor aryl halides described in earlier reports has triggered intensive studies on the development of metal- and photo-catalyzed methods to promote this transformation. We report here that an SNAr reaction of thiols with most electron-poor aryl halides takes place at RT–60 °C under the action of
早期报道中描述的硫醇和反应性较低的缺电子芳基卤化物之间的S N Ar 反应需要更高的反应温度,这引发了对开发金属和光催化方法以促进这种转变的深入研究。我们在此报告,在 K 2 CO 3和 DMAc的作用下,硫醇与大多数缺电子芳基卤化物在 RT–60 °C 下发生S N Ar 反应。在这种温和的条件下,碱和溶剂都起着至关重要的作用。对于对 S N不发生反应的(杂)芳基卤化物Ar反应中,鉴定出两种更强大的草酸二酰胺配体,使其Cu催化的偶联反应能够在低催化负载量下进行。这两种方法的结合为制备(杂)芳基硫醚提供了一种非常有吸引力的方法。