2051-60-7Relevant articles and documents
Synthesis and characterization of palladium nanoparticles immobilized on graphene oxide functionalized with triethylenetetramine or 2,6-diaminopyridine and application for the Suzuki cross-coupling reaction
Boukherroub, Rabah,Mirza-Aghayan, Maryam,Mohammadi, Marzieh
, (2021/11/22)
Graphene oxide (GO) was functionalized with two organic ligands, triethylenetetramine (TETA) or 2,6-diaminopyridine (DAP), followed by palladium nanoparticles (Pd NPs) for the synthesis of Pd NPs/GO-TETA and Pd NPs/GO-DAP nanocomposites, respectively. The two heterogeneous nanocomposites were fully characterized and their efficiency was investigated for C[sbnd]C bond formation for the synthesis of biaryl compounds via the Suzuki cross-coupling reaction of aryl halides with arylboronic acid derivatives. The obtained results indicated that the Pd NPs/GO-TETA nanocomposite was more effective in the Suzuki coupling reaction as compared to Pd NPs/GO-DAP. Thus, the Suzuki cross-coupling reaction of different aryl halides with arylboronic acid derivatives using Pd NPs/GO-TETA nanocomposite catalyst in the presence of Na2CO3 as base in DMF/H2O (1/1) as solvent at 90 °C was carried out to afford the desired biaryl compounds in high to excellent yields (81–100%) and short reaction times (10–90 min). Additionally, Pd NPs/GO-TETA nanocomposite can be recovered and reused for 8 consecutive runs without any apparent loss of its catalytic activity, proving its high stability and potential use in organic transformations.
Buchwald ligand-assisted Suzuki cross-coupling of polychlorobenzenes
Burukin, Alexander S.,Vasil'ev, Andrei A.,Zhdankina, Galina M.,Zlotin, Sergei G.
, p. 400 - 402 (2021/06/07)
Screening of four Buchwald ligands for the cross-coupling of isomeric di-, tri- and tetrachlorobenzenes with arylboronic acids revealed that good yields of exhaustive substitution can be best provided by 2-dicyclohexylphosphino-2′-(dimethylamino) biphenyl (DavePHOS).
Preparation of an Efficient and Recoverable Catalyst through Immobilization of PdCl2 on Modified Poly(styrene-co-maleic anhydride) for the Suzuki Cross-Coupling Reaction
Heravi, M. M.,Hosseinnejad, T.,Mohammadi Zeydi, M.,Montazeri, N.,Zoghi, R.
, p. 1685 - 1693 (2021/12/13)
Abstract: A copolymer of styrene and maleic anhydride was modified via reaction with 4-amino-5-methyl-4H-1,2,4-triazole-3-thiol, and palladium(II) chloride was then immobilized on the modified copolymer. The resulting nanocatalyst was characterized by scanning electron microscopy (SEM), energy dispersive spec-troscopy, X-ray (EDAX) and inductively coupled plasma (ICP) analyses, and FT-IR, 1H NMR, and 13C NMR spectroscopic data. The catalytic efficiency of the new palladium nanoparticles was successfully examined in the Suzuki cross-coupling reaction of various aryl halides with phenylboronic acid in water. The advantages of this strategy were easy recovery and efficient reusability of the expensive PdNPs, high yields of the cross-coupling products, short reaction times, and the use of water as a solvent for a wide range of substrates.
