Catalysis-chemistry

Gharagheizi, Farhad published the artcileCorresponding States Method for Estimation of Upper Flammability Limit Temperature of Chemical Compounds, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Industrial & Engineering Chemistry Research (2012), 51(17), 6265-6269, database is CAplus.

The accuracy and predictability of predictive methods to determine chem. species flammability characteristics are critically important in the chem. industry. This work continued applying the gene expression programming math. strategy to modify existing thermophys. property correlations available in the literature to: optimize the number of independent parameters; amplify the generality; and improve accuracy and predictability. This work presented a simple corresponding states model to predict the upper flammability limit temperature for 1462 organic compounds from 76 chem. families. Correlation parameters included critical temperature and compound acentric factor. Obtained statistical parameters including average absolute relative deviation of results from the DIPPR 801 database values (1.7, 1.8, and 1.7% for training, optimization, and prediction sets, resp.) demonstrated improved accuracy of presented correlations.

Industrial & Engineering Chemistry Research published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Recommanded Product: Bis(4-nitrophenyl)amine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Gharagheizi, Farhad published the artcileGene expression programming strategy for estimation of flash point temperature of non-electrolyte organic compounds, Quality Control of 1821-27-8, the publication is Fluid Phase Equilibria (2012), 71-77, database is CAplus.

The accuracy and predictability of correlations and models to determine the flammability characteristics of chem. compounds are of drastic significance in various chem. industries. In the present study, the main focus is on introducing and applying the gene expression programming (GEP) math. strategy to develop a comprehensive empirical method for this purpose. This work deals with presenting an empirical correlation to predict the flash point temperature of 1471 (non-electrolyte) organic compounds from 77 different chem. families. The parameters of the correlation include the mol. weight, critical temperature, critical pressure, acentric factor, and normal b.p. of the compounds The obtained statistical parameters including root mean square of error of the results from DIPPR 801 data (8.8, 8.9, 8.9 K for training, optimization and prediction sets, resp.) demonstrate improved accuracy of the results of the presented correlation with respect to previously-proposed methods available in open literature.

Fluid Phase Equilibria published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Quality Control of 1821-27-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Higashino, Masato published the artcileStereoselective anti-S_N2′ Mitsunobu reaction of ¦Á-hydroxy-¦Á-alkenylsilanes, Quality Control of 19117-31-8, the publication is Tetrahedron Letters (2011), 52(3), 422-425, database is CAplus.

A novel silyl group-directed anti-S_N2′ reaction of allylic alcs. under Mitsunobu reaction conditions is described. The Mitsunobu reaction of optically active ¦Á-hydroxy-¦Á-alkenylsilanes with a TBS or TIPS group and (E)-olefin gave the anti-S_N2′ product, in which regio- and stereochem. outcomes of the reaction depended on the steric bulkiness of the silyl group to give the (S,E)-vinylsilane. E.g., reaction of (R,E)-1-(tert-butyldimethylsilylZ)-6-phenylhex-2-en-1-ol, 4-nitrobenzoic acid (ArCO₂H) and PPh₃ in anhydrous benzene with DEAD at 0¡ã under argon atm. to give an inseparable mixture of (S)-(TBS)CH(OCOAr)CH:CHCH₂CH₂CH₂Ph and (R)-(TBS)CH:CHCH(OCOAr)CH₂CH₂CH₂Ph in 91% yield (16:84).

Tetrahedron Letters published new progress about 19117-31-8. 19117-31-8 belongs to catalysis-chemistry, auxiliary class Oxidant, name is N-(tert-Butyl)-S-phenylthiohydroxylamine, and the molecular formula is C10H15NS, Quality Control of 19117-31-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ohki, Yasuhiro published the artcileSynthesis of New [8Fe-7S] Clusters: A Topological Link between the Core Structures of P-Cluster, FeMo-co, and FeFe-co of Nitrogenases, Application of 2,4,6-Triisopropylbenzenethiol, the publication is Journal of the American Chemical Society (2007), 129(34), 10457-10465, database is CAplus and MEDLINE.

A coordinatively unsaturated dinuclear Fe(II) complex of bulky thiolates, [(TipS)Fe(¦Ì-SDmp)]₂ (1; Tip = 2,4,6-ⁱPr₃C₆H₂, Dmp = 2,6-(mesityl)₂C₆H₃), was synthesized from stepwise reactions of Fe{N(SiMe₃)₂}₂ with 1 equiv of HSDmp and then with 1 equiv of HSTip. Complex 1 was found to react with elemental S (S₈) in toluene to generate a new class of [8Fe-7S] cluster, [(DmpS)Fe₄S₃]₂(¦Ì-SDmp)₂(¦Ì-STip)(¦Ì₆-S) (2). The cluster 2 was also produced from 1-pot reactions of Fe{N(SiMe₃)₂}₂ + HSDmp + HSTip + S₈ (8p6:10:7/8) and Fe₃{N(SiMe₃)₂}₂(¦Ì-STip)₄ + HSDmp + S₈ (8/3:16/3:7/8), where another [8Fe-7S] cluster, [(TipS)Fe₄S₃]₂(¦Ì-SDmp)₂{¦Ì-N(SiMe₃)₂}(¦Ì₆-S) (3), was also found as a minor byproduct. In either of the clusters, two Fe₄S₃ incomplete cubane units are connected by three anionic ligands, three thiolate S atoms for 2 or two thiolate S atoms and one amide N atom for 3, and one hexacoordinate S atom resides at the center of the [8Fe-7S] core. They have a common Fe(II)₅Fe(III)₃ oxidation states, and an S = ¹/₂ ground spin state was indicated by rhombic EPR signals at 10 K with g = 2.19, 2.07, and 1.96 for 2 and g = 2.13, 2.06, and 1.93 for 3. The structural relevance of clusters 2 and 3 to P-cluster, FeMo-co, and FeFe-co of nitrogenases is discussed.

Journal of the American Chemical Society published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Application of 2,4,6-Triisopropylbenzenethiol.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Matsuo, Jun-Ichi published the artcileA new method for oxidation of various alcohols to the corresponding carbonyl compounds by using N-t-butylbenzenesulfinimidoyl chloride, SDS of cas: 19117-31-8, the publication is Bulletin of the Chemical Society of Japan (2002), 75(2), 223-234, database is CAplus.

Various primary and secondary alcs. were smoothly oxidized to the corresponding aldehydes and ketones by using a new oxidizing agent, N-t-butylbenzenesulfinimidoyl chloride, together with DBU or ZnO. The present oxidation proceeded under mild conditions via five-membered intramol. proton-transfer of an alkyl arenesulfinimidate intermediate.

Bulletin of the Chemical Society of Japan published new progress about 19117-31-8. 19117-31-8 belongs to catalysis-chemistry, auxiliary class Oxidant, name is N-(tert-Butyl)-S-phenylthiohydroxylamine, and the molecular formula is C10H15NS, SDS of cas: 19117-31-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Matsuo, Jun-ichi published the artcileN-tert-Butylbenzenesulfenamide-catalyzed oxidation of alcohols to the corresponding carbonyl compounds with N-chlorosuccinimide, Safety of N-(tert-Butyl)-S-phenylthiohydroxylamine, the publication is Tetrahedron (2003), 59(35), 6739-6750, database is CAplus.

N-tert-Butylbenzenesulfenamide(I)-catalyzed oxidation of various primary and secondary alcs. to the corresponding aldehydes and ketones was performed using N-chlorosuccinimide (NCS). Alcs. containing other functional groups were also oxidized to aldehydes or ketones without damaging any of the functional groups present. Selective oxidation of primary hydroxy groups took place when diols were subjected to the I-catalyzed oxidation Mechanistic investigation suggested that the chlorination of I by NCS led to the formation of a key species, N-tert-butylbenzenesulfinimidoyl chloride, which oxidized the alcs. to the carbonyl products while regenerating the catalyst I.

Tetrahedron published new progress about 19117-31-8. 19117-31-8 belongs to catalysis-chemistry, auxiliary class Oxidant, name is N-(tert-Butyl)-S-phenylthiohydroxylamine, and the molecular formula is C10H15NS, Safety of N-(tert-Butyl)-S-phenylthiohydroxylamine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ciurescu, Georgeta published the artcileMeat quality in broiler chickens fed on cowpea (Vigna unguiculata [L.] Walp) seeds, Safety of Docosahexaenoic Acid, the publication is Scientific Reports (2022), 12(1), 9685, database is CAplus and MEDLINE.

The study aimed to evaluate the effects of a diet containing untreated cowpea (CWP; Aura 26 variety) seeds as a protein source on quality parameters of chickens breast (PM; Pectoralis major) and thigh muscles (BF; Biceps femoris). A total of 240 Ross 308 broiler chickens were randomly allotted to two groups: a control group fed with soybean meal (SBM) and an exptl. group fed with CWP included at 200 g/kg as a replacement of SBM. Each group consisted of six pens as replicates, with 20 chicks per pen. At 6 wk of age, twelve birds/group were slaughtered. Compared to SBM group, the group fed CWP had higher (P < 0.0001) lightness (L*) and redness (a*) values of PM and BF muscles, the latter had also higher yellowness (b*, P < 0.0001). The collagen and protein contents were significantly higher in CWP group in both PM and BF muscles, while fat was lower (P < 0.001) only in BF muscle. The use of CWP into broilers diets did not neg. impact the textural properties, i.e., hardness, adhesiveness, cohesiveness, springiness, gumminess, chewiness, and resilience of PM and BF, showing similar values in both groups. Also, PM and BF muscles of birds fed CWP had significantly higher (P < 0.05) levels of C:18:3n-3 and C:20:5n-3 compared with birds fed SBM. The n-6/n-3 PUFA ratio was significantly lower in CWP group (11.72 and 7.00) compared to SBM (13.47 and 12.63) for both PM and BF muscles. These results indicate that CWP can be considered a promising protein source for broiler chickens feed.

Scientific Reports published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C22H32O2, Safety of Docosahexaenoic Acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Castoldi, Francesca published the artcileChemical activation of SAT1 corrects diet-induced metabolic syndrome, Name: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, the publication is Cell Death & Differentiation (2020), 27(10), 2904-2920, database is CAplus and MEDLINE.

Abstract: The pharmacol. targeting of polyamine metabolism is currently under the spotlight for its potential in the prevention and treatment of several age-associated disorders. Here, we report the finding that triethylenetetramine dihydrochloride (TETA), a copper-chelator agent that can be safely administered to patients for the long-term treatment of Wilson disease, exerts therapeutic benefits in animals challenged with hypercaloric dietary regimens. TETA reduced obesity induced by high-fat diet, excessive sucrose intake, or leptin deficiency, as it reduced glucose intolerance and hepatosteatosis, but induced autophagy. Mechanistically, these effects did not involve the depletion of copper from plasma or internal organs. Rather, the TETA effects relied on the activation of an energy-consuming polyamine catabolism, secondary to the stabilization of spermidine/spermine N¹-acetyltransferase-1 (SAT1) by TETA, resulting in enhanced enzymic activity of SAT. All the pos. effects of TETA on high-fat diet-induced metabolic syndrome were lost in SAT1-deficient mice. Altogether, these results suggest novel health-promoting effects of TETA that might be taken advantage of for the prevention or treatment of obesity.

Cell Death & Differentiation published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C6H20Cl2N4, Name: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Davis, Tyler A. published the artcileRhodium(III)-Catalyzed Intramolecular Hydroarylation, Amidoarylation, and Heck-type Reaction: Three Distinct Pathways Determined by an Amide Directing Group, Application of O-Pivaloylhydroxylamine trifluoromethanesulfonate, the publication is Angewandte Chemie, International Edition (2013), 52(52), 14181-14185, database is CAplus and MEDLINE.

Three distinct rhodium-catalyzed reaction pathways were discovered fro alkene-containing benzamide derivatives Hydroarylation products, amidoarylation products and Heck reaction products can be accessed based on the type of amide reactant. Under optimized conditions the synthesis of the target compounds was achieved using tris(acetonitrile)(pentamethylcyclopentadienyl)rhodium bis(hexafluoroantimonate) or dichlorobis(¦Ì²-chloro)bis(¦Ç⁵-pentamethylcyclopentadienyl)dirhodium as catalysts. The title compounds thus formed included benzofurancarboxamide derivatives, fused isoquinoline-furan derivatives, furo[4,3,2-de]isoquinoline derivatives, pyrano[4,3,2-de]isoquinoline derivatives, cyclopent[de]isoquinoline derivatives

Angewandte Chemie, International Edition published new progress about 1293990-73-4. 1293990-73-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is O-Pivaloylhydroxylamine trifluoromethanesulfonate, and the molecular formula is C6H12F3NO5S, Application of O-Pivaloylhydroxylamine trifluoromethanesulfonate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Kim, Jang-Yup published the artcileReal time XRD analysis of polystyrene/clay nanocomposites by in-situ polymerization, Name: 2-Ethyl-N,N-dimethylhexan-1-amine, the publication is Polymer (Korea) (2005), 29(1), 87-90, database is CAplus.

We have examined the exfoliation behavior of layered clay during in-situ polymerization with styrene by using real time XRD anal. The 4C1 beam line at the Pohang Accelerator Laboratory (PAL) was used for this study. Different exfoliation behaviors have been shown to depend on the cation exchange capacity (CEC) of clay and the chem. structure of organic modifiers. For 10A-MMT and ISA-MMT having high CEC, no peak shifts were observed on real time XRD anal. during polymerization 2¦È For 25A-MMT and VDAC-MIMT, each having low CEC’s as well as aromatic benzene moieties and vinyl groups, resp., decreased as polymerization time increased.

Polymer (Korea) published new progress about 28056-87-3. 28056-87-3 belongs to catalysis-chemistry, auxiliary class Amine,Aliphatic hydrocarbon chain, name is 2-Ethyl-N,N-dimethylhexan-1-amine, and the molecular formula is C10H23N, Name: 2-Ethyl-N,N-dimethylhexan-1-amine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia