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
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.
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 0059; 0060, (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.