Month: December 2022

Zheng, X. P. published the artcileMineralogy and flotation of rare-earth-bearing barium fluorophlogopite, Name: Dodecylamineacetate, the publication is Minerals Engineering (1994), 7(12), 1495-503, database is CAplus.

In an ironmaking process with rare earth-containing iron ores as feeds, the rare earth oxides report to slags. While most rare earth oxides in the slags can be recovered by a combination of high-intensity magnetic separation with gravity separation processes, europium and scandium remain in tailings of the slag mineral separation processes. Crystal structure and chem. composition of the europium and scandium-bearing mineral in the slags have been determined by x-ray diffraction and electron microprobe analyses. This mineral was identified as rare earth-bearing barium fluorophlogopite (REBF). Flotation experiments were conducted to investigate the flotation behaviors of the REBF. Exptl. results show that the REBF can be collected by using dodecylammonium acetate, sodium oleate or a combination of both in an appropriate proportion and sequence. The flotation reaction of the REBF with the collectors was discussed with the help of IR spectra and electrokinetic measurements. Phys. adsorption of the cationic collector and chem. adsorption of the anionic collector on the surface of the neg. charged REBF were observed Synergistic effect is significant when addition of sodium oleate is followed by addition of dodecylammonium acetate during flotation.

Minerals Engineering published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C15H24S, Name: Dodecylamineacetate.

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

Peng, Hao published the artcileOxidation and Amination of Benzylic sp³ C-H Bond Catalyzed by Rhenium(V) Complexes, Category: catalysis-chemistry, the publication is ACS Catalysis (2012), 2(1), 163-167, database is CAplus.

An efficient method for the oxidation of benzylic sp³ C-H bond to produce ketones or esters using rhenium(V) complexes as catalysts has been developed. Moreover, the amination of benzylic sp³ C-H bond with NH₂Ts in the presence of NBS has also been reported in moderate to good yields under the catalyst of rhenium(V)-based complexes.

ACS Catalysis published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C13H10F2, Category: catalysis-chemistry.

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

Jash, Apratim published the artcileTriggered release of hexanal from an imidazolidine precursor encapsulated in poly(lactic acid) and ethylcellulose carriers, Product Details of C16H20N2, the publication is Journal of Materials Science (2018), 53(3), 2221-2235, database is CAplus.

Hexanal is a naturally occurring aliphatic aldehyde with antimicrobial and phospholipase D inhibition properties, useful for post-harvest preservation of fresh fruits and produce. However, hexanal is highly volatile and susceptible to oxidative degradation To overcome these issues, a precursor was synthesized and entrapped in poly(lactic acid) (PLA) fiber or ethylcellulose (EC) particulate carriers. The precursor was synthesized through nucleophilic addition of hexanal to N,N’-dibenzylethane-1,2-diamine to form 1,3-dibenzylethane-2-pentyl imidazolidine-a stable hexanal precursor compound ¹H and ¹³C NMR analyses confirmed the formation of heterocyclic ring structure in the precursor. SEM anal. revealed that the precursor was dispersed homogeneously within the PLA and EC carriers by electrospinning or electrospraying processes, resp. The release of hexanal was triggered by the hydrolysis of the imidazolidine compound at 5, 25, and 45 ¡ãC, via the addition of 0.1 N citric acid to the precursor-loaded carriers. The citric acid solution resulted in significantly (p < 0.05) higher amounts and rates of hexanal released in PLA than EC, but both carriers had similar activation energies of hexanal release. FTIR anal. did not detect specific interactions between the precursor and the polymers. The hexanal precursor developed here potentially can be used as a component of active packaging to deliver hexanal and other aldehydes to enhance storage stability of fresh produce.

Journal of Materials Science published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C16H20N2, Product Details of C16H20N2.

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

Collins, Karl D. published the artcilePreparation of conjugated 1,3-enynes by Rh(III)-catalysed alkynylation of alkenes via C-H activation, Application of (E)-3-(3-Nitrophenyl)acrylic acid, the publication is Chemical Communications (Cambridge, United Kingdom) (2014), 50(34), 4459-4461, database is CAplus and MEDLINE.

An exptl. simple additive-free Rh(III)-catalyzed direct alkynylation of alkenes has been developed. This protocol employs com. available 1-[(triisopropylsilyl)ethynyl]-1,2-benziodoxol-3(1H)-one (TIPS-EBX) as the alkyne source, giving access to conjugated terminal enynes following a simple silyl-deprotection. This method has also been applied to arenes.

Chemical Communications (Cambridge, United Kingdom) published new progress about 1772-76-5. 1772-76-5 belongs to catalysis-chemistry, auxiliary class Benzenes, name is (E)-3-(3-Nitrophenyl)acrylic acid, and the molecular formula is C9H7NO4, Application of (E)-3-(3-Nitrophenyl)acrylic acid.

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

Sibi, Mukund P. published the artcileNitrogen-15 nuclear magnetic resonance spectroscopy. Natural-abundance nitrogen-15 chemical shifts of ring-methylated N,N-dimethylanilines. Effect of inhibition of conjugation, Safety of 2,6-Diisopropyl-N,N-dimethylaniline, the publication is Journal of Organic Chemistry (1977), 42(18), 2999-3004, database is CAplus.

The 15N chem. shifts of PhNHMe, PhNMe2 (I), several ring-alkylated derivatives of I, and their conjugate acids were determined at the natural abundance level. Relative to aniline, N-methylation induced upfield shifts, in contrast to the downfield shifts expected on ¦Á-substitution. The influence of ring-Me substitution on the resonance position of PhNMe2 was the same as that reported for aniline, except for o-substitution. Under these conditions, considerably larger upfield shifts were observed In contrast, the chem. shifts of the conjugate acids all lay within a 2-ppm range. The large diamagnetic shifts induced by o-Me substitution were attributed to the torsional distortion of the MeN group from the optimum conformation for N lone-pair delocalization. The results correlated with appropriate aniline 13C chem. shifts. and, especially, with the ionization potentials of the corresponding aniline ¦Ð orbitals, which are a measure of N lone-pair ¦Ð delocalization. The diamagnetic ¦Á effects could also be rationalized by this means. The N shifts of 2,6-diethyl- and 2,6-diisopropyl-N,N-dimethylaniline were used to estimate torsional angles of 77 and 80¡ã, resp.

Journal of Organic Chemistry published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C5H10Cl3O3P, Safety of 2,6-Diisopropyl-N,N-dimethylaniline.

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

Zhang, Jun-Rong published the artcileDABCO-Promoted Decarboxylative Acylation: Synthesis of ¦Á-Keto and ¦Á,¦Â-Unsaturated Amides or Esters, Product Details of C9H7NO4, the publication is Asian Journal of Organic Chemistry (2017), 6(3), 305-312, database is CAplus.

A metal-free protocol was reported for the synthesis of aryl ¦Á-ketoamides e.g., N,N-dimethyl-2-oxo-2-phenylacetamide and ¦Á,¦Â-unsaturated amides e.g., N,N-dimethylcinnamamide through decarboxylative acylation of various carboxylic acids with carbamic chlorides in good to excellent yields. Further, this method was used for the synthesis of aryl ¦Á-ketoesters e.g., propyl-2-oxo-2-phenylacetate and ¦Á,¦Â-unsaturated esters e.g., Pr cinnamate from corresponding carbonochloridates. 1,4-Diazabicyclo[2.2.2]octane (DABCO) was found to be an effective reagent for decarboxylative acylation of carboxylic acids with carbamic chlorides or carbonochloridates. This protocol offered several advantages such as metal-free and mild conditions, simple operation, a broad substrate scope and high yields.

Asian Journal of Organic Chemistry published new progress about 1772-76-5. 1772-76-5 belongs to catalysis-chemistry, auxiliary class Benzenes, name is (E)-3-(3-Nitrophenyl)acrylic acid, and the molecular formula is C6H10O7, Product Details of C9H7NO4.

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

Li, Daichun published the artcileSynthesis of Marine Cyclopeptide Galaxamide Analogues as Potential Anticancer Agents, Recommanded Product: Fmoc-Pro-OH, the publication is Marine Drugs (2022), 20(3), 158, database is CAplus and MEDLINE.

In this paper, eight new galaxamide analogs (Z-1?Z-8) were synthesized and evaluated for their cytotoxic activities against five cancer cell lines, MCF-7, MD-MBA-231, HepG2, Hela, and A549, using MTT assays. The modified analog Z-6 displayed broad spectrum cytotoxic activity toward each tested cell line with IC50 values of 1.65 ¡À 0.30 (MCF-7), 2.91 ¡À 0.17 (HepG2), 4.59 ¡À 0.27 (MD-MBA-231), 5.69 ¡À 0.37 (Hela), and 5.96 ¡À 0.41 (A549) ¦Ìg/mL, resp. The galaxamides Z-3 and Z-6 induced concentration-dependent apoptosis of the MCF-7 cells after 72 h as evaluated by the flow cytometry experiment The results showed that these compounds could induce MCF-7 cell apoptosis by arresting the G0/G1 phase of the cell cycle and finally achieving the effect of inhibiting the proliferation of MCF-7 cells.

Marine Drugs published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Recommanded Product: Fmoc-Pro-OH.

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

Chen, Xue published the artcileEffects of cooking on the nutritional quality and volatile compounds in omega-3 fatty acids enriched eggs, Synthetic Route of 6217-54-5, the publication is Journal of the Science of Food and Agriculture (2022), 102(9), 3703-3711, database is CAplus and MEDLINE.

The extensive consumption of eggs and their utilization as an ingredient in food products globally offer excellent potential for increasing dietary omega-3 polyunsaturated fatty acid (PUFA) intake. Thus far, research involving dietary focused on changes in their phys. properties after boiling, protein denaturation, storage stability, and other characteristics. However, minimal reports are available regarding the evaluation of nutritional changes. Therefore, this study comprehensively investigated the impact of cooking on the nutritional quality and volatile compound profile of ordinary and omega-3 eggs. Compared with ordinary eggs, those enriched with omega-3 fatty acids contained higher proportions of total omega-3 PUFAs and ¦Á-tocopherol. However, no significant difference was evident between the amino acid compositions of the two types of eggs. Omega-3 eggs boiled for 20 min at 75¡ãC showed higher levels of omega-3 PUFAs, total tocopherol, and essential amino acids while increasing the heating time and temperature reduced these nutrients. Heat treatment significantly decreased the ketones and alc. content while increasing the hydrocarbons level. The overall variations in the metabolic response due to cooking temperature were evidenced by the multiple metabolic associations and clustering on the principal component anal. (PCA) plane and heat map. The findings provided useful information for ensuring quality retention in eggs, especially those enriched with omega-3. 2021 Society of Chem. Industry.

Journal of the Science of Food and Agriculture 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, Synthetic Route of 6217-54-5.

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

Tian, Mi published the artcileMeasurement of size-segregated airborne particulate bound polycyclic aromatic compounds and assessment of their human health impacts – A case study in a megacity of southwest China, HPLC of Formula: 191-07-1, the publication is Chemosphere (2021), 131339, database is CAplus and MEDLINE.

Particle size distribution of particulate polycyclic aromatic compounds (PACs) is one of the important factors controlling human exposure to PACs in air. In this study, size-segregated airborne particle samples were collected in a megacity in southwest China to analyze PACs concentrations and evaluate related health risks. Annual average concentrations of ¦²19PAHs (polycyclic aromatic hydrocarbons, 17.4 ng/m³) and ¦²10OPAHs (oxygenated PAHs, 15.3 ng/m³) were one order of magnitude higher than those of ¦²9MPAHs (Me PAHs, 0.97 ng/m³) and ¦²27NPAHs (nitrated PAHs, 1.54 ng/m³). More than 55% of PACs masses were associated with fine particles (aerodynamic diameter Dae < 2.1¦Ìm). Inhalation exposure assessment showed that less than 60% of particulate bound PACs could deposit in the respiratory tract, which implies that the traditional model using ambient concentration of PACs would overestimate the inhalation risk. On the other hand, incremental lifetime cancer risks from dermal absorption (ILCRderm) were comparable to those from inhalation (ILCRinh) exposure despite the much lower daily dermal absorption dose than the daily inhalation dose, which implies that the health impact might be underestimated if only considering inhalation exposure. Cancer risks from inhalation exposure were mainly attributed to fine particles while those from dermal exposure were mostly associated with coarse particles. Although neither ILCRderm nor ILCRinh exceeded the threshold value of 10^-6 set by USEPA, the total ILCR exceeded this criterion, manifesting potential health risks from exposure to airborne particulate PACs in this region.

Chemosphere published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C18H10, HPLC of Formula: 191-07-1.

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

Xu, Xiao-Long published the artcileCatalytic Redox Chain Ring Opening of Lactones with Quinones To Synthesize Quinone-Containing Carboxylic Acids, Formula: C10H10O3, the publication is Organic Letters (2019), 21(13), 5078-5081, database is CAplus and MEDLINE.

Catalytic ring opening of five- to eight-membered lactones with quinones is achieved through a redox chain mechanism. With low loading of a simple metal triflate Lewis acid catalyst and a chain initiator, C-H bonds of many quinones were efficiently functionalized with carboxylic acid-containing side chains. This method also features 100% atom economy and wide substrate scope. A novel route to the anti-asthma drug Seratrodast was developed. Mechanism study suggests that the redox chain reaction likely undergoes a carbocation intermediate.

Organic Letters published new progress about 2051-95-8. 2051-95-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ketone, name is 3-Benzoylpropionicacid, and the molecular formula is C14H31NO2, Formula: C10H10O3.

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