62005-54-3Relevant academic research and scientific papers
A 2 - (2 - methoxyethoxy) acetal diol preparation method (by machine translation)
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Paragraph 0044-0046, (2017/08/26)
The invention discloses a 2 - (2 - methoxyethoxy) acetal diol preparation method, which belongs to the technical field of drug synthesis, the method comprising the steps of: in order to ethylene glycol monomethyl ether (II) as the starting material and the reaction solvent, with sodium hydroxide mixed vacuum distilling after dehydration, preparation and precipitating intermediate 2 - methoxy ethanol sodium (III), then directly with halogenated acetal glycol (IV) a pot of reaction preparation to obtain crude products, inorganic salt decomposition after the impurities, is distilled under reduced pressure to obtain the final product (I), the method has low production costs, the product quality is stable, mild reaction conditions, safe and reliable operation, process repeatability, high yield, easy large-scale industrialization and the like. (by machine translation)
Tuning the structure and solubility of nanojars by peripheral ligand substitution, leading to unprecedented liquid-liquid extraction of the carbonate ion from water into aliphatic solvents
Ahmed, Basil M.,Calco, Brice,Mezei, Gellert
, p. 8327 - 8339 (2016/06/01)
Nanojars, a novel class of neutral anion-incarcerating agents of the general formula [CuII(OH)(pz)]n (Cun; n = 27-31, pz = pyrazolate anion), efficiently sequester various oxoanions with large hydration energies from water. In this work, we explore whether substituents on the pyrazole ligand interfere with nanojar formation, and whether appropriate substituents could be employed to tune the solubility of nanojars in solvents of interest, such as long-chain aliphatic hydrocarbons (solvent of choice for large-scale liquid-liquid extraction processes) and water. To this end, we conducted a comprehensive study using 40 different pyrazole ligands, with one, two or three substituents in their 3-, 4- and 5-positions. The corresponding nanojars are characterized by single-crystal X-ray diffraction and/or electrospray-ionization mass spectrometry (ESI-MS). The results show that Cun-nanojars with various substituents in the pyrazole 4-position, including long chains, phenyl and CF3 groups, can be obtained. Straight chains are also tolerated at the pyrazole 3-position, and favor the Cu30-nanojar. Homoleptic nanojars, however, could not be obtained with phenyl or CF3 groups. Nevertheless, if used in mixture with the parent non-substituted pyrazole, sterically hindered pyrazoles do form heteroleptic nanojars. With 3,5-disubstituted pyrazoles, only heteroleptic nanojars are accessible. The crystal structure of novel nanojars (Bu4N)2[CO3?{Cu30(OH)30(3,5-Me2pz)y(pz)30-y}] (y = 14 and 15) is presented. We find that in contrast to the parent nanojar, which is insoluble in aliphatic solvents and water, nanojars with alkyl substituents are soluble in saturated hydrocarbon solvents, whereas nanojars based on novel pyrazoles, functionalized with oligoether chains, are readily soluble in water. Liquid-liquid extraction of carbonate from water under basic pH is presented for the first time.
