150-90-3Relevant articles and documents
Hydrogenation and Isomerization of Disodium Maleate in the Solid Phase over Fine Nickel Powder
Harada, Tadao,Osawa, Tsutomu
, p. 1168 - 1169 (1992)
Disodium maleate was converted to a mixture of disodium maleate, fumarate, and succinate in the solid phase when particles of the starting material were kept in contact with fine nickel powder pretreated with hydrogen gas at 200 deg C.
Tuned synthesis of two coordination polymers of Cd(II) using substituted bent 3-pyridyl linker and succinate: Structures and their applications in anion exchange and sorption properties
Maity, Dilip Kumar,Bhattacharya, Biswajit,Halder, Arijit,Ghoshal, Debajyoti
, p. 20999 - 21007 (2015)
Two new Cd(ii) coordination polymers, namely [Cd(3-bpdh)2(ClO4)2]n (1) and {[Cd(3-bpdh)(suc)(H2O)]·3(H2O)}n (2), have been synthesized using a substituted bent N,N′-donor ligand 2,5-bis-(3-pyridyl)-3,4-diaza-2,4-hexadiene (3-bpdh) and aliphatic dicarboxylate disodium succinate (suc) with Cd(ii) perchlorate salts at room temperature by a slow diffusion technique for the exploration of our previous reported work. Both the structures were determined by single-crystal X-ray diffraction analysis and also by other physicochemical methods. Structure analysis revealed that complex 1 is a 1D chain structure containing coordinated perchlorate with a metal centre, and complex 2 shows a porous 3D framework with encapsulation of lattice water molecules into the void along the crystallographic a-axis. The PXRD study shows the bulk purity of both the complexes and TGA analysis of 2 exhibits that the structure is thermally stable up to 250 °C. Complex 1 shows a nice anion exchange property with replacement of weakly coordinated perchlorate with the inclusion of new anions; and the anion exchanged solids were characterised by FT-IR, PXRD and photoluminescence properties. The desolvated framework of 2 exhibits sorption of CO2 and water vapor and surface adsorption of N2 corroborating with the nature of the pore environment present in 2. The photoluminescence study has been also done for both complexes in the solid state which exhibits ligand based emissions at room temperature.
Comparison of the substrate selectivity and biochemical properties of human and bacterial γ-butyrobetaine hydroxylase
Rydzik, Anna M.,Leung, Ivanhoe K.H.,Kochan, Grazyna T.,Loik, Nikita D.,Henry, Luc,McDonough, Michael A.,Claridge, Timothy D.W.,Schofield, Christopher J.
, p. 6354 - 6358 (2014)
2-Oxoglutarate and iron dependent oxygenases have potential for the stereoselective hydroxylation of amino acids and related compounds. The biochemical and kinetic properties of recombinant γ-butyrobetaine hydroxylase from human and Pseudomonas sp. AK1 we
Effect of the Composition of the Medium on the Selectivity of Deactivation of Skeletal Nickel Catalyst
Afineevskii,Lukin,Prozorov
, p. 1976 - 1980 (2018)
The effect of the composition of the catalytic system (the nature and composition of the solvent, specifically, aqueous solutions of sodium hydroxide and their mixtures with aliphatic alcohols with the alcohol concentration of 0.11 mole fractions) and additions of a catalyst poison (sodium sulfide) on the catalytic activity of skeletal nickel in the liquid-phase hydrogenation of the carbon?carbon double bond in sodium maleate was studied. The assumption was made on the decisive role of the solvent in changing the activity of skeletal nickel in the hydrogenation reaction of sodium maleate, which is primarily associated with the redistribution of individual forms of adsorbed hydrogen. In was found that in the water?sodium hydroxide?monohydric alcohol solvent skeletal nickel undergoes selective deactivation at the NaOH concentration of 0.01 M, antiselective deactivation at the NaOH concentration of 0.10 M, and variable deactivation at the NaOH concentration of 1.0 M. It is shown that in some cases sodium sulfide additions exert a promoting effect on skeletal nickel in the hydrogenation of sodium maleate.
The effect of sulphur on the antibacterial properties of succinic acid-Cu(II) and mercaptosuccinic acid-Cu(II) MOFs
Gizer, S. Gorkem,Sahiner, Nurettin
, (2021/09/20)
Microorganism such as bacteria, virus and fungi are causing significant health problems. Here, using succinic acid (SA) and mercaptosuccinic acid (MSA) as organic ligand and Cu(II) ions as complexing agent SA-Cu(II) and MSA-Cu(II) MOFs are synthesized. Th
Process for preparing hyperpolarized substrates and method for MRI
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Page/Page column 31, (2017/08/01)
The present invention generally relates to a process for the preparation of aqueous solutions of hyperpolarized molecules ready for use in in-vivo MR diagnostic imaging, the use thereof as MRI contrast agent in investigation methods for producing diagnostic MR images of a human or non-human animal body organ, region or tissue.
PROCESS FOR MANUFACTURING SUCCINIC ACID
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Page/Page column 15-17, (2011/09/15)
The present invention discloses a Process for the preparation of succinic acid comprising the steps of : a) providing an aqueous medium comprising magnesium succinate by fermentation, wherein a carbohydrate source is fermented by means of a micro-organism to form succinic acid, a magnesium base being added as neutralising agent during fermentation to provide the magnesium succinate; b) subjecting the aqueous medium comprising magnesium succinate to a crystallisation step and a salt exchange step to provide an aqueous solution comprising a monovalent succinate salt, wherein the salt exchange, which is performed either prior to or after crystallisation, comprises treating the magnesium succinate with a monovalent base to provide a magnesium base and the monovalent succinate salt; c) adjusting the concentration of the monovalent succinate salt in the aqueous solution to a value between 10 and 35 wt.%; d) subjecting the aqueous solution comprising the monovalent succinate salt to water-splitting electrodialysis, to produce a first solution comprising monovalent base and a second solution comprising succinic acid and monovalent succinate salt, the electrodialysis being carried out to a partial conversion of 40 to 95 mole%; e) separating the second solution comprising succinic acid and monovalent succinate salt into succinic acid and a solution comprising the monovalent succinate salt by crystallisation; f) recycling the solution of step e) comprising the monovalent succinate salt to step d).
Process for manufacturing succinic acid
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Page/Page column 6-7, (2011/09/15)
The present invention discloses a Process for the preparation of succinic acid comprising the steps of: a) providing an aqueous medium comprising magnesium succinate by fermentation, wherein a carbohydrate source is fermented by means of a micro-organism to form succinic acid, a magnesium base being added as neutralising agent during fermentation to provide the magnesium succinate; b) subjecting the aqueous medium comprising magnesium succinate to a crystallisation step and a salt exchange step to provide an aqueous solution comprising a monovalent succinate salt, wherein the salt exchange, which is performed either prior to or after crystallisation, comprises treating the magnesium succinate with a monovalent base to provide a magnesium base and the monovalent succinate salt; c) adjusting the concentration of the monovalent succinate salt in the aqueous solution to a value between 10 and 35 wt.%; d) subjecting the aqueous solution comprising the monovalent succinate salt to water-splitting electrodialysis, to produce a first solution comprising monovalent base and a second solution comprising succinic acid and monovalent succinate salt, the electrodialysis being carried out to a partial conversion of 40 to 95 mole%; e) separating the second solution comprising succinic acid and monovalent succinate salt into succinic acid and a solution comprising the monovalent succinate salt by crystallisation; f) recycling the solution of step e) comprising the monovalent succinate salt to step d).
19-nor steroids having a thiocarbonated chain in position 11beta, their preparation process and the intermediates of this process, and the intermediates of this process, their use as medicaments and compositions
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, (2008/06/13)
Compounds of formula (I), wherein R17and R′17are such that: either R17and R′17together form ketone, hydrazono, oxime or methylene, or R17is hydroxyl, hydroxymethyl or acyloxy and R′17is hydrogen, alkyl or optionally substitued alkenyl or alkynyl; R3is hydrogen or alkyl; R16is hydrogen, halogen or alkyl; m is 0, 1 or 2; X, Y and Z are such that: X is methylene, arylene or arylenoxy bonded to the steroid by a carbon atom; Y is a saturated or unsaturated straight or branched aliphatic chain which is optionally interrupted by oxygen; and Z is aryl, arylalkyl or straight or branched alkyl; addition salts thereof, a preparation method therefor, medicinal uses thereof, compositions containing said compounds, and resulting novel intermediates.
Base catalyzed hydrolysis of aerosol OT in aqueous and aquo-dioxane media
Mukherjee,Moulik,Mukherjee
, p. 1063 - 1074 (2007/10/03)
The OH- ion catalyzed hydrolysis of AOT and sodium mono-methyl succinate m aqueous and aquo-dioxane media has been studied. The second-order rate constant for the former has been found to be nearly ten times slower than that of the latter. At AOT concentrations above CMC, the rate constants become insensitive to the concentration in the studied range of temperature, 25 °C-40 °C. The activation parameters for the kinetic process have been found to be reasonable, negative entropy of activation has supported a stable transition state complex. A good enthalpy-entropy compensation of the kinetic process has been found both for AOT and sodium monomethyl succinate in aqueous and aquo-dioxane media supporting similar nature of the transition state complexes in the hydrolytic reactions. The enthalpies of hydrolysis of AOT and the half ester of succinic acid in aqueous and aquo-dioxane media have been also reported.
