189828-30-6Relevant articles and documents
Synthesis and application of N-heterocyclic carbene-palladium ligands with glycerol dendrons for the Suzuki-Miyaura cross-coupling in water
Lukowiak, Maike C.,Meise, Markus,Haag, Rainer
, p. 2161 - 2165 (2014)
Highly active glycerol-dendron-supported N-heterocyclic carbene-palladium catalysts with catalytic sites at the core position were obtained with an efficient modular synthesis. A symmetrical ligand structure was designed to build a larger microenvironment by increasing the number of dendron generations. The catalytic activity was tested in Suzuki-Miyaura cross-coupling reactions. Deprotection of the dendritic supported catalysts allowed the catalytic reaction to take place in neat water, which is highly desirable for a more sustainable processing. A positive dendritic effect was observed for coupling of activated and nonactivated bromoaryls. Georg Thieme Verlag Stuttgart. New York.
Suzuki-Miyaura coupling catalyzed by polymer-incarcerated palladium, a highly active, recoverable, and reusable Pd catalyst
Okamoto, Kuniaki,Akiyama, Ryo,Kobayashi, Shu
, p. 1987 - 1990 (2004)
Equation presented. Suzuki-Miyaura coupling using a highly efficient and reusable polymer-incarcerated palladium (Pl Pd) is described. Various coupling reactions proceeded smoothly using Pl Pd with phosphine ligands, and the catalyst could be recovered by simple filtration and reused several times without loss of activity.
Palladium-catalyzed borylation of aryl bromides and chlorides using phosphatrioxa-adamantane ligands
Lamola, Jairus L.,Moshapo, Paseka T.,Holzapfel, Cedric W.,Christopher Maumela, Munaka
, (2021/12/13)
Catalysts based on the combination of Pd(OAc)2 and the electron-deficient phosphatrioxa-adamantane ligands are described for borylation of aryl bromides and chlorides. Catalytic evaluation of a small library of phosphatrioxa-adamantane ligands provided some insights on the preferred ligand steric profile for borylation reactions. The corresponding aryl boronate esters were accessed under mild conditions (25–70 °C) and isolated in high yields (up to 96%).
Highly Active Fe3O4@SBA-15@NHC-Pd Catalyst for Suzuki–Miyaura Cross-Coupling Reaction
?zdemir, ?smail,Akko?, Mitat,Alt?n, Serdar,Bu?day, Nesrin,Ya?ar, Sedat
, (2021/08/03)
A novel Pd-NHC functionalized magnetic Fe3O4@SBA-15@NHC-Pd was synthesized and used as an efficient heterogeneous catalyst in the Suzuki–Miyaura C–C bond formation reactions. The Fe3O4@SBA-15@NHC-Pd characterized by X-Ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared (FTIR) spectroscopy, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy?(TEM), Energy Dispersive X-ray analysis (EDX), Thermogravimetric Analysis (TGA), Differential Thermal Analysis (DTA). The Inductively Coupled Plasma-Optical emission spectroscopy (ICP-OES)?analysis was used to determine the exact amount of Pd (0.33?wt%) in Fe3O4@SBA-15@NHC-Pd. The TEM images of the catalyst showed the existence of palladium nanoparticles immobilized in the catalyst's structure, while no reducing agent was used. The NHC moieties in the catalyst structure could be stabilize Pd(0) nanoparticles prevents agglomeration. The magnetic catalyst was effectively used in the Suzuki–Miyaura cross-coupling reaction of substituted phenylboronic acid derivatives with (hetero)aryl bromides in the presence of a K2CO3 at room temperature in aqueous media and magnetic catalyst could be simply extracted from the reaction mixture by an external magnet. Different aryl bromides were converted to coupled-products in excellent yields with spectacular TOFs values (up to 1,960,339?h?1); in the presence of 1?mg of Fe3O4@SBA-15@NHC-Pd catalyst (contains 3.1 × 10–6?mol% Pd) at room temperature in aqueous media. After reusability experiments, it is found that this catalyst was effectively used up to ten times in the reaction with almost consistent catalytic efficiency. A decrease in the activity of the 10th reused catalyst was found as 9%. Graphic Abstract: [Figure not available: see fulltext.]
Method for synthesizing biphenyl compound by taking phenol as raw material
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Paragraph 0062-0064, (2020/07/15)
The invention discloses a method for synthesizing a biphenyl compound by using phenol as a raw material in the technical field of organic chemical synthesis, which comprises the following steps: carrying out a mixed reaction process on phenol or substituted phenol, alkali and 50-90% ethanol aqueous solution, slowly introducing sulfonyl fluoride gas, and carrying out magnetic stirring reaction at normal temperature for 4-12 hours, adding arylboronic acid, alkali and a palladium catalyst into a round-bottom flask, continuing to react for 6-12 hours at normal temperature, after the reaction is finished, adding a saturated edible salt solution into the round-bottom flask, carrying out a water quenching reaction process to obtain a reaction mixture, extracting a reaction product from the reaction mixture by using ethyl acetate, combining organic phases, concentrating filtrate, and separating the concentrated filtrate by using column chromatography to obtain analytically pure biphenyl or terphenyl compounds. By using the method, on one hand, the production cost of the biphenyl compound is reduced, and on the other hand, the method also has a wide application prospect in the aspects of synthesis of natural products, medicines, pesticides, herbicides, polymer conduction materials, liquid crystal materials and the like.
Suzuki-Miyaura coupling catalyzed by a Ni(II) PNP pincer complex: Scope and mechanistic insights
Madera, Justin,Slattery, Megan,Arman, Hadi D.,Tonzetich, Zachary J.
, (2020/02/04)
The nickel(II) pincer complex, [NiCl(PhPNP)] (PhPNP = anion of 2,5-bis(diphenylphosphinomethyl)pyrrole), has been employed as a precatalyst for the Suzuki-Miyaura cross-coupling reaction of aryl halides and boronic acids. Both electron-rich and electron-deficient aromatic bromides were found to undergo coupling with boronic acids in modest yield at elevated temperature in the presence of K3PO4·H2O. Preliminary mechanistic studies of the reaction identified a novel species formulated as the boronate complex, [Ni(OB{OH}{2-tolyl})(PhPNP)], which most likely represents a catalyst deactivation pathway. The productive catalytic cycle was found to be most consistent with a Ni(I)/Ni(III) process where the boronic acid serves as both reductant and nucleophile in the presence of base.
Method for preparing biaryl hydrocarbon compound by Suzuki coupling reaction
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Paragraph 0081-0085, (2020/12/30)
The invention discloses a preparation method of a biaryl hydrocarbon compound as shown in a structural formula III (the structural formula and substituent are shown in the specification), which comprises the following steps: adding a nonionic surfactant into a reaction system, and carrying out Suzuki coupling reaction on chlorinated aromatic hydrocarbon as shown in a structural formula I and arylboronic acid as shown in a structural formula II. The preparation method provided by the invention is high in chlorinated aromatic hydrocarbon reaction activity, low in raw material cost, mild in reaction condition, green and environment-friendly.
Salicylaldehyde-stabilized palladium nanoparticles for highly efficient suzuki-miyaura reaction at room temperature
Zhou, Zhen,Cao, Gao,Liu, Ning
supporting information, p. 547 - 550 (2019/06/11)
Pd-catalyzed Suzuki-Miyaura cross-coupling reactions promoted by simple and commercial salicylaldehyde-based ligands were investigated. The effect of the ligands was evaluated and the reaction conditions were optimized. Moreover, the physical nature of the palladium was determined by TEM analysis and poison tests. It demonstrated that this catalytic system can be reused for ten consecutive runs and showed excellent activities toward aryl bromides with arylboronic acids at room temperature in air.
A new diphosphine-carbonyl complex of ruthenium: an efficient precursor for C-C and C-N bond coupling catalysis
Mukherjee, Aparajita,Hrovat, David A.,Richmond, Michael G.,Bhattacharya, Samaresh
, p. 10264 - 10272 (2018/08/06)
Reaction of 1,2-bis(diphenylphosphino)benzene (dppbz) with [{Ru(CO)2Cl2}n] affords [Ru(dppbz)(CO)2Cl2], where the two carbonyls are mutually cis and the two chlorides are trans. The molecular structure of [Ru(dppbz)(CO)2Cl2], has been determined by X-ray crystallography, and the stability of the different available stereoisomers has been computationally evaluated. [Ru(dppbz)(CO)2Cl2] has been found to serve as an excellent pre-catalyst for catalytic Suzuki-type C-C coupling and Buchwald-type C-N coupling reactions.
Method for preparing biaryl compound by using aryl sulfuryl fluoride as raw material
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Paragraph 0056-0057, (2018/06/14)
The invention discloses a method for preparing a biaryl compound by using aryl sulfuryl fluoride as a raw material. The method comprises the following steps: adding a palladium catalyst, the aryl sulfuryl fluoride, an aryl boride and alkali into a round-bottom flask in sequence; magnetically stirring at a room temperature for carrying out Suzuki cross coupling reaction; after completing the reaction, adding a saturated saline solution for carrying out quenching reaction; extracting a reaction product from a reaction mixture by using ethyl acetate; merging organic phases; concentrating filtrate, and carrying out column chromatography isolation, thus obtaining the analytically pure biaryl compound, wherein the reaction is as shown in a following formula which is shown in the description. Byusing the method disclosed by the invention, on one hand, the production cost of the biaryl compound is reduced, and on the other hand, the method has a wide application prospect in aspects such as natural products, medicines, pesticides, herbicides and synthesis of high polymer conductive materials and liquid crystal materials.
