825-55-8Relevant articles and documents
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Nilsson
, p. 679,681 (1966)
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Preparation of Co-Pd bimetallic nanoparticles encapsulated in bamboo-like N-doped mesoporous carbon by a facile one-pot method for green Suzuki coupling
Wu, Li,Long, Yu,Ma, Jiantai,Lu, Gongxuan
, p. 3809 - 3821 (2019)
CoPd bimetallic nanoparticles (NPs) were successfully encapsulated in bamboo-like N-doped mesoporous carbon (bNMC) via a facile one-pot method through combination of dissolving chelation and carbonization reactions. The morphology, structure and composition of CoPd-bNMC was verified by detailed characterization including SEM, TEM, EDX, XPS, XRD, N2 adsorption–desorption, VSM, and ICP. The as-prepared CoPd/bNMC showed excellent activity and selectivity for Suzuki coupling under mild and green condition. Though the Pd content of CoPd/bNMC was half of Pd/bNMC, the catalytic performance of CoPd/bNMC was almost the same with Pd/bNMC, which was caused by its special bimetallic alloy structure, high BET surface area and pore volume. Importantly, CoPd/bNMC with magnetic property can be separated using external magnetic field and reused for five consecutive runs in the reaction of Suzuki crossing without significant loss of activity. It was found the Pd content only showed slight loss (2.3?wt.%) after five reused reactions, which was because CoPd bimetallic NPs were inside the bamboo-like N-doped mesoporous carbon.
Recyclable and ligandless suzuki coupling catalyzed by carbon nanotube-supported palladium nanoparticles synthesized in supercritical fluid
Pan, Horng-Bin,Yen, Clive H.,Yoon, Byunghoon,Sato, Masaki,Wai, Chien M.
, p. 3473 - 3478 (2006)
Carbon nanotube-supported palladium nanoparticles prepared by a supercritical fluid deposition method show high activities for catalyzing Suzuki coupling reactions, and the catalysts can be recycled and reused at least six times without losing activity. Copyright Taylor & Francis Group, LLC.
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
Mirza-Aghayan, Maryam,Mohammadi, Marzieh,Boukherroub, Rabah
, (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.
Pyrazole-Mediated C-H Functionalization of Arene and Heteroarenes for Aryl-(Hetero)aryl Cross-Coupling Reactions
Kundu, Abhishek,Dey, Dhananjay,Pal, Subhankar,Adhikari, Debashis
, p. 15665 - 15673 (2021/11/16)
Herein we introduce a transition-metal-free protocol that involves a commercially available, inexpensive pyrazole molecule to conduct C-C cross-coupling reactions at room temperature via a radical pathway. Using this method, an aryldiazonium salt has been coupled to a wide range of arenes and heteroarenes including benzene, mesitylene, thiophene, furan, benzoxazole to result the corresponding biaryl products. The full reaction mechanism is elucidated along with the crystallographic probation of an active initiator species. A potassium-stabilized deprotonated pyrazole steers single-electron transfer to the substrate and behaves as an initiator for the reaction.
Triptycene ring metal palladium compound and application thereof
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Paragraph 0093-0101, (2021/02/24)
The invention discloses a triptycene cyclometalated palladium compound and an application thereof. The triptycene cyclometalated palladium compound has the following general formula, wherein three RAscan be the same or different and are respectively and independently expressed as R1-(Z1-A1-Z2)x-,wherein the three RBs can be the same or different and are respectively and independently expressed asR2-(Z3-A2-Z4)y-, the two RCs may be the same or different, each independently expressed as R3-(Z5-A3-Z6)z-. The triptycene cyclometalated palladium compound provided by the invention has a triptycenelarge-steric-hindrance group, and can stabilize a zero-valent palladium intermediate in a catalytic cycle, so that the catalytic efficiency is improved, the use amount of a catalyst can be reduced tobe less than ten thousandth, and the compound is simple in synthesis step, high in yield, relatively low in cost and suitable for various substrates, and the method has an important application valuefor researching the progress and application of the coupling reaction.