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.
Method for synthesizing biphenyl compound by taking suaeda salsa extract liquor as solvent
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Paragraph 0049-0050, (2020/06/30)
The invention discloses a method for synthesizing a biphenyl compound by using suaeda salsa extract as a solvent in the technical field of organic chemical synthesis, which comprises the following steps: roasting suaeda salsa in a muffle furnace to obtain ash, dissolving the ash in distilled water, refluxing, cooling the solution, and filtering to obtain a faint yellow solution which is the suaedasalsa extract liquor; sequentially adding 1mmol of aryl halide, 1.1mmol of arylboronic acid, 0.001mmol to 0.01mmol of a catalyst and 4ml of the suaeda salsa extract liquor into a round-bottom flask,stirring at 100 DEG C to react for 2 hours, cooling the reactant to room temperature, filtering, mixing the obtained filter residue with a palladium catalyst to obtain a mixture; and dissolving the mixture in ethyl acetate, filtering to remove the palladium catalyst, and drying the filtrate by distillation to obtain the biphenyl compound. According to the scheme, a phosphine ligand, alkali and anadditive do not need to be added, a Suzuki reaction system with biomass extract as a reaction medium is adopted, and a green, simple, convenient and efficient method is provided for synthesizing biphenyl compounds.