- Catalytic hydrogenation products of aromatic and aliphatic dicarboxylic acids
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Hydrogenation of aromatic dicarboxylic acids gave 100 % selectivity to respective cyclohexane dicarboxylic acid with 5 % Pd/C catalyst. 5 % Ru/C catalyst was observed to give over hydrogenation products at 493 K and at lower temperature (453 K) the selectivity for cyclohexane dicarboxylic acids was increased. Hydrogenation of phthalic acid with Ru-Sn/Al2O3 catalyst was observed to give phthalide instead of 1,2-benzene dimethanol or 2-hydroxy methyl benzoic acid. Ru-Sn/Al2O3 catalyst selectively hydrogenated the carboxylic group of cyclohexane dicarboxylic acids to give cyclohexane dimethanol. Use of proper catalysts and reaction conditions resulted in desired products.
- Shinde, Sunil B.,Deshpande, Raj M.
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p. 1137 - 1142
(2019/04/05)
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- Synthesis of phthalate-free plasticizers by hydrogenation in water using RhNi bimetallic catalyst on aluminated SBA-15
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In this study, rhodium-nickel bimetallic nanoparticles loaded on aluminated silica (RhNi/Al-SBA-15) were used as catalysts for the hydrogenation of phthalate in water to produce environmentally acceptable non-phthalate plasticizers. Chemical fluid deposition (CFD) was used to dope metals onto the aluminated silica support, which helped to create a uniform structure of RhNi on Al-SBA-15. The introduction of Ni helped to reduce the use of expensive Rh and increase the number of metal active sites by reducing the bimetallic nanoparticle size. Aluminated SBA-15 not only acted as the support for the RhNi bimetallic catalyst but also enhanced the reaction efficiency by introducing Br?nsted and Lewis acid sites and the absorption of phthalates on the catalyst in water. The physicochemical properties of prepared catalysts were characterized by N2 adsorption-desorption isotherm, X-ray diffraction (XRD), in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), Scanning electron microscopy (SEM), and Transmission electron microscopy (TEM). The catalytic performance of the synthesized catalysts was evaluated with the hydrogenation of dimethyl phthalate (DMP). Despite the low solubility of DMP in water, the hydrogenation using Rh0.5Ni1.5/Al-SBA-15 was carried out with an 84.4% reaction yield (cis-?:?trans- = 97.5?:?2.5) at 80 °C using 1000 psi of H2 after 2 h.
- Phan-Vu, Duc-Ha,Tan, Chung-Sung
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p. 18178 - 18188
(2017/04/04)
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- Cis - 1, 3 - cyclohexane dicarboxylic acid preparation method (by machine translation)
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The invention discloses a cis - 1, 3 - cyclohexane dicarboxylic acid, its specific steps are as follows: the isophthalic acid, catalyst and solvent is added to the high pressure in the reactor, via the high-pressure hydrogenation, cis-trans mixture obtain
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Paragraph 0006; 0007
(2017/08/27)
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- COMPOUNDS AND THEIR METHODS OF USE
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Compounds and compositions comprising compounds that inhibit glutaminase are described herein. Also described herein are methods of using the compounds that inhibit glutaminase in the treatment of cancer.
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Paragraph 0324; 0329-0331
(2014/05/25)
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- COMPOUNDS, PHARMACEUTICAL COMPOSITIONS AND USES AS GLUTAMINASE INHIBITORS FOR TREATING CANCERS THEREOF
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Provided are compounds of formula (I), wherein X, Y, Z, W, m, n, o, p, R1, R2 and R6 are defined as in the description. Pharmaceutical compositions and uses as glutaminase inhibitors for treating cancers thereof are also provided.
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Page/Page column 106-108
(2014/06/11)
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- COMPOUNDS AND THEIR METHODS OF USE
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Provided are compounds of formula (I), which can inhibit glutaminase. Pharmaceutical compositions comprising these compounds and uses as glutaminase inhibitors for treating cancers thereof are also provided.
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Page/Page column 123
(2014/06/11)
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- METHOD FOR PRODUCING BIS(AMINOMETHYL)CYCLOHEXANES
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A method for producing bis(aminomethyl)cyclohexanes includes a nuclear hydrogenation step of producing hydrogenated phthalic acids or phthalic acid derivatives by nuclear hydrogenation of phthalic acids or phthalic acid derivatives of at least one selecte
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Paragraph 0162-0165
(2013/08/14)
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- Stereoselective process for preparing cylcohexyl amine derivatives
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A process for preparing (1R,3S)-3-(9-chloro-3-methyl-4-oxo-5H-(isoxazoloquinolin-5-yl))cyclohexanecarboxylic acid and esters thereof, as represented by formulas II and III, wherein R is a lower alkyl groups, and A and B are N or O, provided that when A is N, B is O, or when A is O, B is N: Formula (III) and Formula (II).
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- STEREOSELECTIVE PROCESS FOR PREPARING CYCLOHEXYL AMINE DERIVATIVES
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A process for preparing (1R,3S)-3-(9-chloro-3-methyl-4-oxo-5H-(isoxazoloquinolin-5-yl))cyclohexanecarboxylic acid and esters thereof, as represented by formulas II and III, wherein R is a lower alkyl groups, and A and B are N or O, provided that when A is
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- Remote Enzyme-Coupled Amine Release
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A remote enzyme-coupled amine release system has been developed in which biochemical and chemical "demasking" processes are sequentially linked via an enforced 1,3-diaxial disposition.Thus, pig liver esterase hydrolyzes an ester to an acid, and the acid promotes a fast intramolecular cleavage of an amide to an amine.The sequence has potential pharmacokinetic relevance because it allows enzyme-specific discharge of amine-based drugs following their trans-membrane journey as uncharged amides.
- Menger, F. M.,Ladika, M.
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p. 3006 - 3007
(2007/10/02)
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- 1,1-Alkanediol dicarboxylate linked antibacterial agents
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Useful antibacterial agents in which a penicillin and/or a beta-lactamase inhibitor are linked via 1,1-alkanediol dicarboxylates are of the formula STR1 where A is the residue of certain dicarboxyic acids, R3 is H or (C1 -C3), n is zero or 1 such that when n is zero R is P or B and R1 is the residue of certain esters, H or a salt thereof; and when n is 1, one of R and R1 is P and the other is B, and P is STR2 where R2 is H or certain acyl groups, and B is the residue of a beta-lactamase inhibiting carboxylic acid; a method for their use, pharmaceutical compositions thereof and intermediates useful in their production.
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