Month: November 2022

Yang, Rongqiang published the artcileAssociation of fish oil containing lipid emulsions with retinopathy of prematurity: a retrospective observational study, Application of Docosahexaenoic Acid, the publication is BMC Pediatrics (2022), 22(1), 113, database is CAplus and MEDLINE.

Retinopathy of prematurity (ROP) remains a leading cause of childhood blindness worldwide. This study aimed to investigate whether supplementation of n-3 polyunsaturated fatty acids (n-3 PUFAs) in parenteral nutrition may have beneficial effects on ROP in preterm infants. A total of 89 preterm infants, admitted to Neonatal Intensive Care Unit (NICU) in Anhui Provincial Children’s Hospital from Sept. 2017 to August 2020, were recruited in the study. Based on the medical documents, the subjects were categorised into two groups: administration of the fish oil emulsion (n=43) containing soy oil, medium-chain-triglycerides (MCT), olive oil and fish oil (6g/dL, 6g/dL, 5g/dL and 3g/dL resp.), and the soy oil emulsion (n=46) containing 10g/dL of soy oil and MCT each. At 4 wk of hospitalization, ROP was screened and diagnosed. Fatty acids in erythrocytes were determined using gas chromatog. The averaged birth weight and gestational age were 1594¡À296 g and 31.9¡À2.3 wk, 1596¡À263 g and 31.6¡À2.3 wk resp. for preterm infants in the fish oil group and soy oil group. After 4 to 6 wk of hospitalization, among all the preterm infants, 52 developed ROP (all stages) indicating an incidence of ROP at 58.43%. Although the incidence of ROP with any stages showed no differences between the two groups, the severe ROP incidence in the group with fish oil emulsions (2.33%) was significantly lower than that in the group with soy oil emulsions (23.91%) (P<0.05). After 14 days of nutrition support, the preterm infants administered fish oil emulsions had an increase in erythrocyte DHA content, with a reduction in ratio of arachidonic acid (AA) to DHA and an increase of n-3 index. Supplementation of n-3 PUFAs through parenteral fish oil containing lipid emulsions resulted in an increase in erythrocyte DHA, and this might have beneficial effects on prevention of severe ROP in preterm infants.

BMC Pediatrics 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 C18H28N2O7, Application of Docosahexaenoic Acid.

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

Wang, Xin published the artcileFlavonoids and antioxidant activity of rare and endangered fern: Isoetes sinensis, Name: 4-(Phenoxymethyl)benzoic acid, the publication is PLoS One (2020), 15(5), e0232185, database is CAplus and MEDLINE.

Isoetes sinensis Palmer is a critically endangered, first-class protected plant in China. Until now, researchers have primarily focused on the ultrastructure, phylogeny, and transcriptomes of the plant. However, flavonoid profiles and bioactivity of I. sinensis have not been extensively investigated. To develop the endangered I. sinensis for edible and medicinal purposes, flavonoid content, chem. constitution, and antioxidant activities were investigated in this study. Results revealed the following. 1) The total flavonoid content was determined as 10.74 ¡À 0.25 mg/g., 2) Antioxidant activities were stronger than most ferns, especially ABTS free radical scavenging activities. 3) Four flavones, containing apigenin, apigenin-7-glucuronide, acacetin-7-O-glcopyranoside, and homoplantageninisoetin; four flavonols, namely, isoetin, kaempferol-3-O-glucoside, quercetin-3-O-[6″-O-(3-hydroxy-3-methylglutaryl)-¦Â-D-glucopyranoside], and limocitrin-Neo; one prodelphinidin (procyanidins;) and one nothofagin (dihydrochalcone) were tentatively identified in the mass spectrometry-DAD (254nm) chromatograms. This study was the first to report on flavonoid content and antioxidant activities of I. sinensis. Stronger antioxidant activity and flavonoid content suggests that the endangered I. sinensis is an important and potentially edible and medicinal plant.

PLoS One published new progress about 31719-76-3. 31719-76-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 4-(Phenoxymethyl)benzoic acid, and the molecular formula is C4H10O2, Name: 4-(Phenoxymethyl)benzoic acid.

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

Trifunovic, Srecko published the artcileNew simple synthesis of N-substituted 1,3-oxazinan-2-ones, Synthetic Route of 17351-61-0, the publication is Synthesis (2010), 943-946, database is CAplus.

An efficient and simple synthesis of N-substituted 1,3-oxazinan-2-ones was developed that involves a three-component, one-pot reaction of readily available tetraethylammonium bicarbonate, 1,3-dibromopropane, and a primary amine in methanol at room temperature L-Alanine can be used as the amino component to give the chiral product (2S)-2-(2-oxo-1,3-oxazinan-3-yl)propanoic acid.

Synthesis published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C12H20O6, Synthetic Route of 17351-61-0.

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

Blower, Philip J. published the artcileComplexes of molybdenum(II) and -(IV) and tungsten(II) with sterically hindered thiolate ligands. Synthesis, reactivity, and x-ray crystal structures of tetraphenylphosphonium dicarbonyltris(2,4,6-triisopropylbenzenethiolato)molybdenum(II) and (methyl cyanide)(phenyldiazenido)tris(2,4,6-triisopropylbenzenethiolato)molybdenum(IV), Recommanded Product: 2,4,6-Triisopropylbenzenethiol, the publication is Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1972-1999) (1985), 2639-45, database is CAplus.

Reaction of [MBr₂(CO)₄] (M = Mo, W) reacted with SR^– to give [M(SR)₃(CO)₂]^– [R = C₆H₂(CHMe₂)₃-2,4,6, C₆H₃(CHMe₂)₂-2,6, C₆H₂Br(CHMe₂)₂-4,2,6, C₆H₂Me₃-2,4,5, C₆F₅], isolated as their [PPh₄]⁺ salts (I). I reacted with CO to give [PPh₄][M(SR)₃(CO)₃]. Reaction of I [R = C₆H₂(CHMe₂)₃-2,4,6] (II) with neutral donors gave [PPh₄][Mo[SC₆H₂(CHMe₂)₃-2,4,6]₃(CO)L] (L = MeCN, Me₃CCN, PMe₂Ph, Me₃CNC) and with [N₂Ph][BF₄] in MeCN to give [Mo(NNPh)[SC₆H₂(CHMe₂)₃-2,4,6]₃(NCMe)] (III). The structures of II and III were determined by x-ray crystallog.; results were refined to R values of 0.0755 and 0.075 for 2939 and 1172 reflections, resp., for II and III, resp. The anions in II and III have trigonal-bipyramidal structures with axial coligands.

Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1972-1999) 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, Recommanded Product: 2,4,6-Triisopropylbenzenethiol.

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

Pratt, Derek A. published the artcileSubstituent Effects on the Bond Dissociation Enthalpies of Aromatic Amines, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Journal of the American Chemical Society (2002), 124(37), 11085-11092, database is CAplus and MEDLINE.

Bond dissociation enthalpy differences, Z-X ¦¤BDE = BDE(4-YC₆H₄Z-X) – BDE(C₆H₅Z-X), for Z = CH₂ and O are largely independent of X and are determined mainly by the stabilization/destabilization effect of Y on the 4-YC₆H₄Z^? radicals. The effects of Y are small (¡Ü2 kcal/mol for all Y) for Z = CH₂, but they are large for Z = O, where good correlations with ¦Ò_p⁺(Y) yield ¦Ñ⁺ = 6.5 kcal/mol. For Z = NH, two sets of electrochem. measured N-H ¦¤BDEs correlate with ¦Ò_p⁺(Y), yielding ¦Ñ⁺ = 3.9 and 3.0 kcal/mol. However, in contrast to the situation with phenols, these data indicate that the strengthening effect on N-H BDEs of electron-withdrawing (EW) Y’s is greater than the weakening effect of electron-donating (ED) Y’s. Attempts to measure N-H ¦¤BDEs in anilines using two nonelectrochem. techniques were unsuccessful; therefore, we turned to d. functional theory. Calculations on 15 4-YC₆H₄NH₂ gave N-H ¦¤BDEs correlating with ¦Ò_p⁺ (¦Ñ⁺ = 4.6 kcal/mol) and indicated that EW and ED Y’s had comparable strengthening and weakening effects, resp., on the N-H bonds. To validate theory by connecting it to experiment, the N-H ¦¤BDEs of four 4,4′-disubstituted diphenylamines and five 3,7-disubstituted phenothiazines were both calculated and measured by the radical equilibration EPR technique. For all compounds, theory and experiment agreed to better than 1 kcal/mol. Dissection of N-H ¦¤BDEs in 4-substituted anilines and O-H ¦¤BDEs in 4-substituted phenols into interaction enthalpies between Y and NH₂/OH (mol. stabilization/destabilization enthalpy, MSE) and NH^?/O^? (radical stabilization/destabilization enthalpy, RSE) reveals that for both groups of compounds, ED Y’s destabilize the mol. and stabilize the radical, while the opposite holds true for EW Y’s. However, in the phenols the effects of substituents on the radical are roughly 3 times as great as those in the mol., whereas in the anilines the two effects are of comparable magnitudes. These differences arise from the stronger ED character of NH₂ vs OH and the weaker EW character of NH^? vs O^?. The relatively large contributions to N-H BDEs in anilines arising from interactions in the mols. suggested that N-X ¦¤BDEs in 4-YC₆H₄NH-X would depend on X, in contrast to the lack of effect of X on O-X and CH₂-X ¦¤BDEs in 4-YC₆H₄O-X and 4-YC₆H₄CH₂-X. This suggestion was confirmed for X = CH₃, H, OH, and F, for which the calculated NH-X ¦¤BDEs yielded ¦Ñ⁺ = 5.0, 4.6, 4.0, and 3.0 kcal/mol, resp.

Journal of the American Chemical Society 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

Petkevich, S. K. published the artcileSynthesis of Fluorine-Containing Derivatives of 5-Arylisoxazoles and 4,5-Dichlorothiazole, Related Products of catalysis-chemistry, the publication is Russian Journal of General Chemistry (2018), 88(2), 234-240, database is CAplus.

Alkylation of fluorophenols and phenolic aldehydes with 5-phenyl(p-tolyl)-3-chloromethylisoxazole under the Williamson reaction conditions afforded the corresponding ethers. Condensation of the resulting phenolic aldehyde derivatives and 5-phenyl(p-tolyl)isoxazole-3-carbaldehydes with p-fluoroaniline resulted in fluorine-containing azomethines. Acylation of fluorinated amines with 5-(p-tolyl)isoxazole- and 4,5- dichloroisothiazole-3-carbonyl chlorides gave rise to fluorinated amides bearing isoxazole and isothiazole fragments, representatives of which showed a synergistic effect in compositions with insecticides.

Russian Journal of General Chemistry published new progress about 30670-30-5. 30670-30-5 belongs to catalysis-chemistry, auxiliary class Polyfluoroalkanes, name is 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, and the molecular formula is C10H6F17N, Related Products of catalysis-chemistry.

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

Krut’ko, N. P. published the artcileAdsorption-induced depression of the strength of potassium chloride grains under the action of fatty amines and water, Product Details of C14H31NO2, the publication is Russian Journal of Applied Chemistry (2005), 78(8), 1213-1217, database is CAplus.

The surface activity of higher aliphatic amines and their salts at the interface between their solutions and air, oil, and KCl grains and their influence on the strength characteristics, moisture absorption, and caking of the grains were studied.

Russian Journal of Applied Chemistry 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 C14H31NO2, Product Details of C14H31NO2.

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

Korshuk, E. F. published the artcileEffect of surface-active modifiers (aliphatic amines and their salts) on the physicochemical properties of granulated potassium fertilizer, Related Products of catalysis-chemistry, the publication is Zhurnal Prikladnoi Khimii (Sankt-Peterburg) (1999), 72(4), 559-563, database is CAplus.

A study was made of the physicochem. properties of granulated potassium fertilizers (water absorption, hydrophobicity, dynamic strength) in relation to the possibility of using higher aliphatic amines and their salts to regulate these properties. Data are reported for the acetates and chlorides of C_12-18 amines; other amines (Armin NT, ASSA-E, Fludiram F-94, Fludiram BR-3) were also investigated.

Zhurnal Prikladnoi Khimii (Sankt-Peterburg) 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 C14H31NO2, Related Products of catalysis-chemistry.

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

Korshuk, E. F. published the artcileCharacteristics of structure and water-repellent effect of solutions of bases and salts of higher aliphatic amines, Safety of Dodecylamineacetate, the publication is Vestsi Akademii Navuk BSSR, Seryya Khimichnykh Navuk (1989), 29-33, database is CAplus.

The structure and hydrophobization activity of solutions of C₁₂-, C₁₄-, and C₁₈-aliphatic amines and their acetates were studied with respect to their use as collectors for the separation of KCl and NaCl in K ore flotation. H₂O was used as a solvent for amine acetates, while ETOH and iso-PrOH as solvents for amines. The adsorption of amine acetates on KCl crystals is preceded by the association of mols. and ions in micelles, while the adsorption of amine bases takes place, predominantly, from their ionic-mol. solutions with subsequent association in the surface adsorption layer. The higher effectiveness of amine collectors compared to their acetates at equal length of the alkyl chain was due to the higher d. of the adsorption layer at lower equilibrium concentrations Thus, the consumption of amine solutions in iso-PrOH for the flotation of sylvinite ores is much lower than that of amine salts.

Vestsi Akademii Navuk BSSR, Seryya Khimichnykh Navuk 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 C14H31NO2, Safety of Dodecylamineacetate.

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

Aleksandrovich, Kh. M. published the artcileESR-spectroscopic study of the micellar state of solutions of higher aliphatic amine salts, Quality Control of 2016-56-0, the publication is Kolloidnyi Zhurnal (1990), 52(5), 835-40, database is CAplus.

An ESR-spectroscopic study was made of micellar solutions of aliphatic amine acetate salts with a long C₁₂-C₁₈ chain, aimed at evaluation of their micellar state on the basis of mol. interaction and ionization of polar groups. The change of these parameters was examined various factors (ionic strength of surfactant solutions, temperature, solubilization of organic oleophilic substances). A relation between the micellar state and the flotability of surfactants was established.

Kolloidnyi Zhurnal 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 C14H31NO2, Quality Control of 2016-56-0.

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