16939-04-1Relevant articles and documents
Bulk TiPd alloys as easily recyclable and preactivation-free heterogeneous catalysts for cross-coupling reactions
Azuma, Ryusei,Takahashi, Yuya,Kondo, Ryota,Suzuki, Takeyuki,Takeshita, Hiroyuki T.,Obora, Yasushi
, p. 710 - 715 (2019)
TiPd alloys have been found to be novel heterogeneous palladium catalysts for organic cross-coupling reactions. Catalyst preactivation is not necessary, resulting in facile recovery and reuse of the catalysts. Palladium is not leached into the reaction solution and the catalysts can be recycled several times without losing their catalytic activity.
4-Amino-1,2,4-triazoles-3-thiones and 1,3,4-oxadiazoles-2-thiones·palladium(II) recoverable complexes as catalysts in the sustainable Suzuki-Miyaura cross-coupling reaction
Chehrouri, Manel,Moreno-Cabrerizo, Cristina,Othman, Adil A.,Chabour, Ihssene,Ferrándiz-Saperas, Marcos,Sempere, Inmaculada,D?nda?, H. Ali,de Gracia Retamosa,Sansano, José M.
, (2020)
The Suzuki-Miyaura cross-coupling reaction using 4-amino-1,2,4-triazoles and 1,3,4-oxadiazoles-2-thiones·palladium (II) is studied. The reaction is optimized and the most appropriate catalytic complex is tested with several aryl halides, boronic acids in an environmentally benign solvent system (H2O/EtOH). The recovery of the catalytic species is also surveyed because of the nature of the employed solvent. A domino process is efficiently carried out following the standard conditions. Several surface parameters of the ligands are analyzed and the resulting values are extrapolated to the insoluble palladium catalyst.
Catalytic C-H arylation of unactivated heteroaromatics with aryl halides by cobalt porphyrin
Qian, Ying Ying,Wong, Ka Lai,Zhang, Meng Wen,Kwok, Tsz Yiu,To, Ching Tat,Chan, Kin Shing
, p. 1571 - 1575 (2012)
Direct C-H arylation of unactivated heteroaromatics with aryl halides catalyzed by cobalt porphyrin is reported. The reaction is proposed to go through a homolytic aromatic substitution reaction. The aryl radical is electrophilic and a SOMO-HOMO interaction is predominant in the aryl radical addition process.
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.
One-step synthesis of magnetically recyclable palladium loaded magnesium ferrite nanoparticles: application in synthesis of anticancer drug PCI-32765
Dasari, Gopala Krishna,Sunkara, Satyaveni,Gadupudi, Purna Chandra Rao
, p. 753 - 763 (2020/02/13)
Novel Palladium nanoparticles supported nano Magnesium ferrite catalyst (Pd/MgFe2O4) was synthesized by one-step ultrasound assisted coprecipitation. In-situ formed by-products assisted salt cage calcination approach was employed to