76650-29-8Relevant articles and documents
A green direct preparation of a magnetic ordered mesoporous carbon catalyst containing Fe-Pd alloys: Application to Suzuki-Miyaura reactions in propane-1,2-diol
Peter,Derible,Parmentier,Le Drian,Becht
, p. 4931 - 4936 (2017)
We report here a direct one-pot preparation of a magnetic mesoporous carbon containing Fe-Pd alloys from biosourced tannin as a carbon precursor, the Pluronic F127 surfactant as a pore structuring agent, PdCl2 and Fe(NO3)3. The starting materials are cheap and easily accessible making the synthesis environmentally benign. This catalyst was successfully used for Suzuki-Miyaura reactions in the presence of extremely low amounts of supported Pd (150 μequiv.) in a non-toxic solvent (propane-1,2-diol). The catalyst can be recovered quantitatively by simple application of an external magnetic field and biaryls containing 1.5 μequiv. of Pd (i.e. 1 ppm) are obtained without any additional purification steps.
Extended architectures constructed of thiourea-modified SBA-15 nanoreactor: A versatile new support for the fabrication of palladium pre-catalyst
Alamgholiloo, Hassan,Noroozi Pesyan, Nader,Rostamnia, Sadegh
, (2020/02/04)
We designed and synthesized a novel catalyst consisting of ordered mesoporous silica (SBA-15) functionalized with bis(thiourea) (BTU) linker. The regular and unique pore channels of BTU-SBA-15 ensure proper control of the size and homogeneous distribution of palladium nanoparticles. The physiochemical properties of the hybrid Pd?BTU-SBA-15 pre-catalyst were investigated using various techniques. The proposed catalyst is found to be very active, reusable, stable and scalable, and has excellent reactivity and selectivity for Suzuki and Heck coupling reactions under very mild and sustainable reaction conditions.
Synthesis of water soluble Pd-Piperidoimidazolin-2-ylidene complexes and their catalytic activities in neat water
?ak?r, Sinem,Türkmen, Hayati
, (2020/02/04)
Through the strategy of water soluble N-heterocyclic carbene (NHC) ligand, Pd-catalyzed reactions were developed in aqueous media. Therefore, four new piperidoimidazolinium salts (1a-d) consisting of sulfonate (a), esther (b, c) and carboxylic acid (d) functionalities and their water-soluble Pd-NHC complexes (2a-d) were synthesized. The new compounds were characterized by elemental analysis, FTIR, TGA, UV–vis and NMR spectroscopy. The catalytic activities of water soluble Pd-NHC complexes (2a-d) were investigated using the Suzuki-Miyaura (S-M) reaction and the reduction of nitroarenes. We found that the water-soluble polar or ionic groups on piperidoimidazolin-2-ylidine had an effect on the catalytic activity. The water-soluble catalyst can be recycled efficiently and reused six times with only a very slight loss of catalytic activity.