- Synthesis, characterization and behavior in water/DMSO solution of Ru(II) arene complexes with bioactive carboxylates
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The reactions of [RuCl(μ-Cl)(η6-p-cymene)]2 with sodium carboxylates, in methanol or acetonitrile solution, afforded the complexes [RuCl(κ2O-RCO2)(η6-p-cymene)] (RCO2 = valproate, 1; aspirinate, 2; diclofenate, 3), in 79–96% yields. Analogously, [RuCl(κ2O-dfCO2)(η6-benzene)], 4, was obtained in admixture with minor by-products from [RuCl(μ-Cl)(η6-benzene)]2 and sodium/silver diclofenate. The sequential reaction of [RuCl(μ-Cl)(η6-p-cymene)]2 with sodium salicylate and PPh3 gave [Ru(κ2O,O′-salCO2)(PPh3)(η6-p-cymene)], 5, in 70% yield. The hydride complex [Ru2Cl2(μ-Cl)(μ-H)(η6-p-cymene)2], 6, was produced in 36% yield from [RuCl(μ-Cl)(η6-p-cymene)]2 and sodium formate. An optimization of the experimental work-up allowed to isolate [RuCl(μ-Cl)(η6-p-cymene)]2 with an improved yield respect to the literature (98% vs. 65%). The bidentate coordination mode of the carboxylato ligands in 1–5 was unambiguously ascertained by IR and NMR spectroscopy, moreover the solid state structure of 1 was elucidated by single crystal X-ray diffraction. Complexes 1–3 experience rapid and quantitative dissociation of the carboxylato anion in DMSO/water/NaCl mixtures, mainly converting into [RuCl2(DMSO)(η6-p-cymene)], 7.
- Biancalana, Lorenzo,Pampaloni, Guido,Zacchini, Stefano,Marchetti, Fabio
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supporting information
p. 201 - 211
(2018/07/06)
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- 13C NMR spectroscopic studies of the behaviors of carbonyl compounds in various solutions
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13C NMR spectroscopic studies were performed for carbonyl compounds having a hydroxyl group, a carboalkoxy group, an acetoxy group, or a carboxyl group in various solvents with different polarities for observation of their behaviors of 13C NMR chemical shifts of carbonyl carbons in solutions. It was found that the chemical shifts of the carbonyl carbons in 13C NMR have good correlation with the empirical parameter for solvent polarities, ETN, depending on the structures. Inter- or intramolecular hydrogen bonding and dipolar-dipolar interactions appear to play a key role in this observation.
- Hiraga, Yoshikazu,Chaki, Saori,Niwayama, Satomi
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p. 4677 - 4681
(2017/11/21)
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- Process for the preparation of a pharmacologically active chemical combination
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Process for the preparation of a pharmacologically active chemical combination constituted by the association, through chemical bonds, of units equal to one another, having each an own pharmacological activity, and with the general formula (I): M—A—X—B—M, where M indicates said unit having an own pharmacological activity, X indicates a “bidentate” structure suitable to interconnect the M units, A and B indicate functional groups either equal to or different from one another which allow the interconnection between M and X.
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- Analgesic method
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Disclosed herein are analgesic copper coordination compounds and a process for using them in the treatment of analgesia in animal bodies. The copper coordination compounds utilized are the reaction products of copper salts with: 1. carboxylic acids or their alkaline earth salts; 2. aromatic carboxylic acids or their alkaline earth salts; 3. heterocyclic carboxylic acids or their alkaline earth salts; 4. amino acids or their alkaline earth salts; 5. anthranilic acids or their alkaline earth salts; 6. salicyclic acids or their alkaline earth salts; 7. acetylsalicylates or their alkaline earth salts; 8. arylacetic acids or their alkaline earth salts; 9. disubstituted aminodithiocarbamates, and mixtures of any of the above. The process disclosed comprises administering to animals, orally or parenterally, in controlled dosages, the aforementioned copper coordination compounds.
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- Anti-inflammatory and anti-ulcer compounds and process
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Disclosed herein are anti-inflammatory and anti-ulcer copper coordination compounds and a process for using them in the treatment of arthritis and gastrointestinal ulcers in animal bodies. The copper coordination compounds utilized are the reaction products of copper salts with: 1. aromatic carboxylic acids or their alkaline earth salts; 2. heterocyclic carboxylic acids or their alkaline earth salts; 3. amino acids or their alkaline earth salts; 4. amines; and 5. suitably substituted steroids. The process disclosed comprises administering to experimental animals, orally or parentrally (subcutaneously), in controlled dosages, the aforementioned copper coordination compounds for the treatment of inflammation (i.e., arthritis) and ulcers of the gastrointestinal tract.
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