2051-62-9Relevant academic research and scientific papers
Application of cyclic thiourea as an efficient ligand in palladium-catalyzed Hiyama cross-coupling reactions
Wu, Zhi-Sheng,Yang, Min,Li, Hong-Ling,Qi, Yan-Xing
, p. 1415 - 1419 (2008)
Cyclic thiourea has been first utilized as an efficient ligand in palladium-catalyzed Hiyama cross-coupling reactions. In the presence of palladium(II) acetate, N,N′-bis(2,5-di-tert-butylphenyl)-N,N′- ethylenethiourea, tetrabutylammonium fluoride, and dioxane, aryl halides (X = I, Br, Cl) underwent smooth cross coupling with trimethoxy(phenyl)silane to afford the corresponding biaryl products in moderate to excellent yields. Furthermore, the thiourea can be recovered by column chromatography and reused with negligible loss in catalytic activity. Georg Thieme Verlag Stuttgart.
Synthesis, structure and characterization of picolyl and benzyl linked biphenyl nickel NHC complexes and their catalytic activity in Suzuki-Miyaura cross-coupling reactions
Muniyappan, Nalluchamy,Junaid, Qazi Mohammad,Sabiah, Shahulhameed
, (2021)
Picolyl and benzyl linked biphenyl nickel NHC complexes [NiL1Br2] (1), [NiL2]Br2 (2) [NiL3]Br2 (3) and [NiL3(N3)2] (4) were synthesized and characterized by
Electrochemical synthesis and characterization of palladium nanoparticles on nafion-graphene support and its application for Suzuki coupling reaction
Shendage, Suresh S.,Patil, Umakant B.,Nagarkar, Jayashree M.
, p. 3457 - 3461 (2013)
The electrochemically deposited palladium nanoparticles on nafion-graphene support showed an excellent catalytic activity for Suzuki coupling reactions. The as obtained catalyst was characterized by SEM, TEM, EDAX, XRD, and TGA. The particle size of palladium nanoparticles (Pd NPs) determined from TEM was in the range of 4-12 nm. The mean diameter of Pd NPs was found to be 8.1 ± 1.9 nm. The recyclability of the catalyst was examined and it did not show any significant loss of catalytic activity for five consecutive cycles.
Greener approach for synthesis of monodispersed palladium nanoparticles using aqueous extract of green tea and their catalytic activity for the Suzuki–Miyaura coupling reaction and the reduction of nitroarenes
Veisi, Hojat,Rostami, Amin,Shirinbayan, Mohadeseh
, (2017)
A facile and green route for the synthesis of palladium nanoparticles (NPs) was developed utilizing non-toxic and renewable natural green tea extract as the reducing, stabilizing and capping agent. The as-prepared Pd-NPs@G.Tea extract was characterized us
A highly stable and efficient magnetically recoverable and reusable Pd nanocatalyst in aqueous media heterogeneously catalysed Suzuki C-C cross-coupling reactions
Abbas Khakiani, Bahareh,Pourshamsian, Khalil,Veisi, Hojat
, p. 259 - 265 (2015)
Surface modification of Fe3O4 nanoparticles with triethoxyethylcyanide groups was used for the immobilization of palladium nanoparticles to produce Fe3O4/Ethyl-CN/Pd. The catalyst was characterized using Fourier transform infrared, wavelength-dispersive X-ray, energy-dispersive X-ray and X-ray photoelectron spectroscopies, field-emission scanning electron and transmission electron microscopies, and X-ray diffraction, vibrating sample magnetometry and inductively coupled plasma analyses. In this fabrication, cyano groups played an important role as a capping agent. The catalytic behaviour of Fe3O4/Ethyl-CN/Pd nanoparticles was measured in the Suzuki cross-coupling reaction of various aryl halides (Ar-I, Ar-Br, Ar-Cl) with phenylboronic acid in aqueous phase at room temperature. Interestingly, the novel catalyst could be recovered in a facile manner from the reaction mixture by applying an external magnet device and recycled seven times without any significant loss in activity.
Plasma synthesis of nitrogen-doped porous graphene supporting Pd nanoparticles as a new catalyst for C-C coupling reactions
Ren, Liang,Yang, Fan,Li, Yongfeng,Liu, Ting,Zhang, Liqiang,Ning, Guoqing,Liu, Zhichang,Gao, Jinsen,Xu, Chunming
, p. 26804 - 26809 (2014)
We report an environmentally-friendly approach to the synthesis of hybrids based on porous graphene and metal nanoparticles. The nitrogen-doped porous graphene (N-PG) and Pd nanoparticles decorated N-PG (Pd/N-PG) was synthesized by a plasma method. The N-PG was characterized by X-ray photoelectron spectroscopy and Raman spectroscopy, and the results clearly indicate that the amount of nitrogen doping was 6.65 wt%. The synthesized Pd/N-PG hybrid materials were confirmed by transmission electron microscopy, X-ray diffraction and energy-dispersive X-ray spectroscopy mapping. The hybrid material based on Pd/N-PG as a new catalyst was applied in Suzuki reaction. This catalyst offers a number of advantages such as high stability, easy removal from the reaction mixture and reusability with minimal loss of activity, showing better performance than the well-known commercial Pd/C catalyst. This journal is the Partner Organisations 2014.
Green synthesis of palladium nanoparticles using Hibiscus sabdariffa L. flower extract: Heterogeneous and reusable nanocatalyst in Suzuki coupling reactions
Hekmati, Malak,Bonyasi, Fahimeh,Javaheri, Hadis,Hemmati, Saba
, (2017)
An elementary and ecological method has been designed for the biosynthesis of palladium nanoparticles, through the utilization of aqueous extract of red tea (Hibiscus sabdariffa L.) as a reducing and stabilizing agent. The nanoparticles obtained were characterized through UV–visible spectroscopy, transmission election microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, scanning election microscopy, energy-dispersive X-ray analysis and inductively coupled plasma analysis. The nanoparticles with spherical shape and dimensions of approximately 10?nm were used as a heterogeneous catalyst for Suzuki coupling reactions under mild conditions. The high efficiency of the catalytic reaction was affirmed by the good yields of products, easy work-up, absence of palladium leached from the support and smooth recovery of catalyst.
Synthesis of biaryls using palladium nanoparticles immobilized on peptide nanofibers as catalyst and hydroxybenzotriazole as novel phenylating reagent
Ghorbani-Choghamarani, Arash,Taherinia, Zahra
, p. 469 - 474 (2017)
Peptide nanofibers decorated with palladium nanoparticles catalyzed direct coupling of aryl halides with hydroxybenzotriazole to afford the corresponding biaryls in good to excellent yields. The coupling reactions proceeded under simple, green, and mild conditions. The peptide nanofibers were used as recyclable supports in the coupling reactions. This approach is the first to use hydroxybenzotriazole as a phenylating agent.
Palladium anchored to SBA-15 functionalized with melamine-pyridine groups as a novel and efficient heterogeneous nanocatalyst for Suzuki-Miyaura coupling reactions
Veisi, Hojat,Hamelian, Mona,Hemmati, Saba
, p. 25 - 33 (2014)
The synthesis and characterization of an efficient and reusable catalyst, SBA-15/CCPy/Pd(II) nanocatalyst by grafting of melamine bearing pyridine groups on SBA-15 and subsequent generation of Pd nanoparticles, are described. The catalyst has been characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), inductivity coupled plasma (ICP), nitrogen adsorption-desorption, and Fourier transform infrared (FTIR) spectroscopy. The catalyst is used in Suzuki cross-coupling reaction of various aryl halides, including less reactive chlorobenzene, and phenylboronic acid to give biaryls without any additive or ligand. These cross coupled products were produced in excellent yields under mild conditions at extremely low palladium loading (～0.3 mol%) with significantly high turnover frequencies (TOFs). The heterogeneous catalyst can be readily recovered by simple filtration and reused 7 times without significant loss in its activity.
Hypervalent iodine in synthesis 47 : Cross-coupling reaction of diaryliodonium salts with Grignard reagents via a novel double metal co-catalyst
Wang,Chen
, p. 3607 - 3612 (2000)
The cross-coupling of diaryliodonium salts with Grignard reagents in the presence of ZnCl2 and a palladium catalyst afforded biaryls under mild conditions and in good yields.
