553-26-4Relevant articles and documents
Intramolecular Electron Transfer from Pentacyanoferrate(II) to Pentaaminecobalt(III) with 3,3'-Dimethyl-4,4'-bipyridine, 4,4'-Bipyridylacetylene, 1,4-Bis(4-pyridyl)butadiyne, 2,7-Diazapyrene, and 3,8-Phenanthroline as Bridging Ligands: Adiabaticity and th
Lee, Gyu-Hwan,Ciana, Leopoldo Della,Haim, Albert
, p. 2535 - 2541 (1989)
Rate constants for intramolecular electron transfer from iron to cobalt in (NH3)5CO(III)LFe(II)(CN)5 (L=3,3'-dimethyl-4,4'-bipyridine, 4,4'-bipyridylacetylene, 1,4-bis(4-pyridyl)butadiyne, 2,7-diazapyrene, and 3,8-phenanthroline) have been measured at 25
On the Reaction of Lithium Diisopropylamide with ?-Deficient Heteroaromatics. A Single Electron Transfer Mechanism
Newkome, George R.,Hager, David C.
, p. 599 - 601 (1982)
Evidence is presented in support of one-electron transfer as the key step in the reaction of lithium diisopropylamide (LDA) with ?-deficient heteroaromatics.
Synthetic transformations of sesquiterpene lactones 9.*Synthesis of 13-(pyridinyl)eudesmanolides
Patrushev, Sergey S.,Shakirov, Makhmut M.,Shults, Elvira E.
, p. 165 - 171 (2016)
[Figure not available: see fulltext.]The reaction of isoalantolactone, a sesquiterpene α-methylidene-γ-lactone, with bromo(iodo)pyridines under the Heck reaction conditions gave 3-(pyridylmethylidene)-8а-methyldecahydronaphtho[2,3-b]furan-2(3Н)-ones and 3-(pyridylmethyl)-8а-methyloctahydronaphtho[2,3-b]-furan-2(4Н)-ones, products of double bond migration. The yield and product ratio depended on the reaction conditions and the nature of halopyridine. The effectiveness of Pd(OAc)2–caffeine catalytic system was demonstrated in this reaction.
Exploring the pH dependence of viologen reduction by α-carbon radicals derived from Hcy and Cys
Wang, Dong,Crowe, William E.,Strongin, Robert M.,Sibrian-Vazquez, Martha
, p. 1876 - 1878 (2009)
The colorimetric reaction of homocysteine (HCy) with a series of viologen salts suggests a linear correlation between the mid-point reduction potential of Hcy-derived α-carbon radicals and pH.
Highly efficient removal of paraquat pesticide from aqueous solutions using a novel nano Kaolin modified with sulfuric acid via host–guest interactions
Mohammadzadeh Kakhki, Roya,Karimian, Azam,Saadati Rad, Masoud
, p. 307 - 313 (2020)
Contamination of wastewaters with pesticides has significant risk for environmental water. In spite of the rule of Europ, paraquat is used extensively as an herbicide in the all around the world and it is likely to be released into drinking water. Therefore the elimination of it from water is very important. In this paper a new sulfuric acid modified nano kaolin sorbent was synthesized with a simple and low cost method. Thereafter it was applied for removing of paraquat and the experimental conditions such as concentration of herbicide, dose of sorbent and pH of solution were optimized. The results showed the unmodified Kaolin wasn’t able to remove the paraquat efficiently. But with the proposed modified nano Kaolin removal percent reach to 98% in a short time 60 min. Also the results showed this system obeys from Frendluich adsorption isotherm.
Suzuki–Miyaura arylation of 2,3-, 2,4-, 2,5-, and 3,4-dibromothiophenes
Babkova, Mariia,Baran, Andrei,Petkus, Jana,Shubin, Kirill
, (2022/03/15)
A convenient and general method for Suzuki–Miyaura double cross-coupling of various dibromothiophenes was developed. Using a simple and cheap catalytic system Pd(OAc)2/PPh3 in 95% EtOH, various (hetero)arylboronic acids react with dibromothiophenes providing diarylthiophenes, useful in the synthesis of metal–organic frameworks (MOFs), in moderate to excellent yields. The overall efficiency of the catalytic process and slight excess of boronic acids allowed to suppress formation of side products and significantly simplify the purification of products.
METHOD FOR COUPLING HALOGENATED PYRIDINE COMPOUND WITH HALOGENATED AROMATIC COMPOUND
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Paragraph 0054; 0055, (2020/10/20)
There is a demand for the development of a technique according to which a reaction for coupling a halogenated pyridine compound with a halogenated aromatic compound can be performed in a simple manner through a small number of steps without using expensive agents such as a palladium catalyst. A method for coupling a halogenated pyridine compound with a halogenated aromatic compound includes a step of coupling a halogenated pyridine compound with a halogenated aromatic compound to obtain a pyridine compound by reacting, in a reaction solvent, the halogenated pyridine compound and the halogenated aromatic compound with a solution containing an alkali metal.
Green-Synthesized Nickel Nanoparticles on Reduced Graphene Oxide as an Active and Selective Catalyst for Suzuki and Glaser-Hay Coupling Reactions
Murugan, Karthik,Nainamalai, Devarajan,Kanagaraj, Pavithara,Nagappan, Saravana Ganesan,Palaniswamy, Suresh
, (2020/07/09)
A mild and benign methodology to syntheses biaryls and 1,3-diynes has been demonstrated using the nickel nanoparticles supported on reduced graphene oxide (RGO-Ni) as a heterogeneous catalyst which is prepared using green reagents. A series of substituted biaryls and 1,3-diynes has been synthesised in good to excellent yields through C-C homocoupling reaction of arylboronic acids and terminal alkynes respectively using 1,4-dioxane as a benign solvent. The present ligand-free catalytic system proceeds smoothly under mild conditions, avoids noble and stoichiometric metal reagents and tolerates sensitive functional groups. Also has a wide substrate scope and feasible with other nitrogen and sulphur containing heteroaryl boronic acids. Hot filtration test unambiguously proves the true heterogeneity of the catalyst and which support for the further reusability of the catalyst for several times without any change in the activity. The easy preparation and simple magnetic separation, stability and reusability reveal that as-prepared RGO-Ni as a versatile catalyst for the synthesis of polyaromatic compounds both in academia and industries. Highlights: Green-synthesized RGO-Ni nanocomposite used as a heterogeneous catalyst for Suzuki type (C-C) and Glaser–Hay (C ≡ C) homocoupling coupling reactions. Ligand-free catalytic system and avoids noble and stoichiometric metal reagents Short reaction time with a minimum catalyst (nickel) loading RGO-Ni nanocomposite is highly stable, reusable, and magnetically retrievable.
ELECTRON DONOR, AND METHOD FOR SYNTHESIZING 4, 4'-BIPYRIDINE USING ELECTRON DONOR
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Paragraph 0078-0081; 0087-0111, (2020/09/09)
Provided are an electron donor that is easy to handle and can be used to carry out a coupling reaction economically and efficiently through simple operations under mild conditions in a short period of time, and a method for synthesizing 4,4′-bipyridine using the electron donor. The electron donor includes a mixture of a dispersion product obtained by dispersing sodium in a dispersion solvent and 1,3-dimethyl-2-imidazolidinone, and this electron donor is used in the method for synthesizing 4,4′-bipyridine.
Decoration of copper foam with Ni nanorods and copper oxide nanosheets to produce a high-stability electrocatalyst for the reduction of CO2: Characterization of the electrosynthesis of isonicotinic acid
Mohammadzadeh, Safoora,Zare, Hamid R.,Khoshro, Hossein
, p. 678 - 685 (2019/11/14)
CuO–Cu2O (CuxO) nanosheets were coated on a copper foam substrate by the electrochemical anodization method in an alkaline solution. Constant current coulometry was performed to electrodeposit Ni nanorods on the surface of a Cu/CuxO electrode. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) proved that the copper oxide nanosheets were anchored on the copper foam substrate and modified by Ni nanorods (Cu/CuxO/Ni). The process took place via a facile and inexpensive electrodeposition method. As the results indicate, owing to the synergistic effect of adjacent CuxO and Ni sites, a Cu/CuxO/Ni electrode has a very good and stable electrocatalytic activity to reduce CO2. As tested in this study, the product of the electrocatalytic reduction of CO2 (i.e. activated CO2, or CO2 ??) can be used for the electrocarboxylation of pyridine in mild conditions. Once an electron is transferred from CO2 ?? to pyridine, a pyridine radical anion is formed. Based on the EC'C′CC mechanism, this radical anion reacts with CO2 ?? and produces isonicotinic acid as the main product. In addition, two pyridine radical anions react together and produce a 4,4′-bipyridine dimer. The high stability of the electrocatalyst during the electrolysis process and the simplicity of the workup make the proposed modified electrode appropriate for the electrosynthesis of some organic compounds.
