Catalysis-chemistry

Promkatkaew, Malinee published the artcilePhotophysical properties and photochemistry of substituted cinnamates and cinnamic acids for UVB blocking: effect of hydroxy, nitro and fluoro substitutions at ortho, meta and para positions, Application In Synthesis of 1772-76-5, the publication is Photochemical & Photobiological Sciences (2014), 13(3), 583-594, database is CAplus and MEDLINE.

Photophys. properties and photochem. of various substituted cinnamates and cinnamic acids for UV B blocking were investigated exptl. and theor. This series includes monohydroxy, -nitro and -fluoro derivatives The absorption spectra were satisfactorily reproduced by the direct SAC-CI method with respect to the peak position and intensity. The transition character of the low-lying two ¦Ð¦Ð^* and ¦Ò¦Ð^* states for these 18 derivatives was analyzed. The para derivatives have a different transition character of the ¦Ð¦Ð^* transitions compared with those of the ortho and meta derivatives To elucidate the relaxation mechanism, the emission spectra were observed with oxygen quenching and the photostability was examined exptl. The calculated radiative lifetimes indicate that the ortho- and meta-substituted derivatives have longer lifetimes for emission than the para derivatives The potential energy curves of the first and second singlet excited states of the hydroxy derivatives as well as the vertical singlet and triplet transitions were examined to investigate the relaxation qual. The ortho and meta derivatives have an energy barrier or flat surface in S₁ resulting in fluorescence, whereas the para derivatives show nonradiative decay without an energy barrier. The para-hydroxy derivative was found to be an excellent UV absorber based on its broad absorption in the UVB/UVA regions, less emission and higher photostability.

Photochemical & Photobiological Sciences 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 In Synthesis of 1772-76-5.

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

Ohki, Yasuhiro published the artcileSynthesis of the P-Cluster Inorganic Core of Nitrogenases, Synthetic Route of 22693-41-0, the publication is Journal of the American Chemical Society (2003), 125(14), 4052-4053, database is CAplus and MEDLINE.

The [8Fe-7S] core of the P-clusters in nitrogenases is unique among the known [Fe-S] clusters which are essential to electron-transfer processes in nature. The [8Fe-7S] cluster was thought unstable and to exist only in protein environments. This unusual [8Fe-7S] structure can be self-assembled from the reaction of Fe(II) bis-amide, tetramethylthiourea, 2,4,6-triisopropylbenzenethiol, and elemental sulfur in a specific mole ratio. The structure of the complex isolated therefrom, [{N(TMS)₂}{SC(NMe₂)₂}Fe₄S₃]₂(¦Ì₆-S){¦Ì-N(TMS)}₂¡¤C₇H₈, closely resembles that of the reduced form (P^N) of the P-clusters, while the 6Fe(II)2Fe(III) oxidation state was manifested by the Mossbauer study.

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, Synthetic Route of 22693-41-0.

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

Chu, Wenyi published the artcileSynthesis and herbicidal activity of N-(4,6-dimethoxy-2-pyrimidinyl)-2-(aryloxy)acetamide, HPLC of Formula: 1798-04-5, the publication is Huaxue Shijie (2005), 46(12), 741-744, database is CAplus.

Seven (phenoxy)acetamide derivatives were prepared on the basis of (oxy)acetamide herbicides. They were synthesized by the reaction of 2-amino-4,6-dimethoxypyrimidine with (aryloxy)acetic acids prepared from phenol derivatives Their chem. structures and purity were confirmed by IR, ¹H NMR spectra, elemental anal., and HPLC. The result of the biol. tests showed that two of them had strong herbicidal activity. The compounds thus prepared were evaluated against Setaria viridis (green bristlegrass), Digitaria sanguinalis (large crabgrass), Echinochloa crus-galli (barnyard grass), Zinnia elegans, Abutilon theophrasti (Indian mallow).

Huaxue Shijie published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, HPLC of Formula: 1798-04-5.

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

Liao, Xiaoting published the artcileEffects of different sources of diet on the growth, survival, biochemical composition and physiological metabolism of clam (Cyclina sinensis), Safety of Docosahexaenoic Acid, the publication is Aquaculture Research (2022), 53(10), 3797-3806, database is CAplus.

It is essential to formulate artificial diets for Cyclina sinensis to satisfy the requirements of industrial aquaculture. We evaluated the effects of different dietary sources on the growth, survival, nutritional components, digestive performance and nonspecific immunity of C. sinensis. The diets of the three exptl. groups were as follows: natural bait (control group, CG), fermented Enteromorpha prolifea (EP) compound diet (Diet #1), and fermented Pyropia yezoensis (PY) compound diet (Diet #2). Feeding these diets did not affect the individuals final weight, specific growth rate and survival rate. The total amino acid and total monounsaturated fatty acid of individuals fed with Diet #1 were significantly higher than those provided with the other diets (p < 0.05). There were no significant differences in the activities of ¦Á-amylase, lipase, trypsin, total superoxide dismutase, lysozyme and acid phosphatase in the clam fed with different diets. In conclusion, the two fermented seaweed compound diets prepared herein can replace natural bait and meet the growth and developmental needs of C. sinensis. The fermented EP compound diet can improve the nutritional quality of the clam. This study lays a preliminary foundation for developing new artificial diets for clams and elucidates the further utilization of low-value seaweed resources.

Aquaculture Research 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

Yang, Xinglin published the artcileAuxiliary-assisted palladium-catalyzed halogenation of unactivated C(sp³)-H bonds at room temperature, Application In Synthesis of 1949-41-3, the publication is Chemical Communications (Cambridge, United Kingdom) (2016), 52(38), 6423-6426, database is CAplus and MEDLINE.

The direct transformation of unactivated C(sp³)-H bonds into C-halogen bonds was achieved by palladium catalysis at room temperature with good functional group tolerance. Some drugs and natural products were readily modified by this method. Merged with substitution reaction, newly formed C-X bonds can be transformed into diverse C-O, C-S, C-C and C-N bonds. A preliminary mechanism study demonstrates that solvent is crucial for C-H activation and the C-H activation step is involved in the rate-limiting step. An isolated Pd(II) intermediate can be transformed into a halogenated product with the retention of conformation which suggests that concerted reductive elimination from Pd(II) to form a C-X bond was favored.

Chemical Communications (Cambridge, United Kingdom) published new progress about 1949-41-3. 1949-41-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene, name is 2-Methyl-4-phenylbutanoic acid, and the molecular formula is C23H20BN, Application In Synthesis of 1949-41-3.

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

Wang, Zhaohong published the artcileOrganic electro-optic thin films by simultaneous vacuum deposition and laser-assisted poling, Product Details of C14H14N2O2, the publication is Optics Letters (2011), 36(15), 2853-2855, database is CAplus and MEDLINE.

Organic materials with a high second-order optical nonlinearity have an important application for the next generation of computing, telecommunications, and other industries. Because of a high electro-optic coefficient and low dielec. constant, N-benzyl-2-methyl-4-nitroaniline (BNA) single crystals have been grown and their optical properties have been extensively studied. In this Letter, a poled BNA thin film material was prepared through simultaneous vacuum evaporation and laser-assisted elec. poling. The linear electro-optic coefficients of BNA were measured by a Young’s two-slit interference electro-optic measurement method. The dependence of the resulting electro-optic properties on optical power was explored. Enhancement induced by laser illumination was demonstrated. The BNA thin film can exhibit an r₃₃ value comparable to that of BNA single crystals.

Optics Letters published new progress about 201157-13-3. 201157-13-3 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is N-Benzyl-2-methyl-4-nitroaniline, and the molecular formula is C10H16O2, Product Details of C14H14N2O2.

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

Wang, Li published the artcileAdsorption mechanism of mixed anionic/cationic collectors in Muscovite – Quartz flotation system, Application of Dodecylamineacetate, the publication is Minerals Engineering (2014), 44-50, database is CAplus.

The flotation separation of muscovite from quartz was investigated using mixed sodium oleate/dodecylamine acetate (NaOL/DDA) collectors. The experiments were conducted on single minerals and on a mixture of minerals, and their collecting performances were studied by means of Fourier transform IR (FTIR) spectroscopy, zeta potential technique and XPS. Neither muscovite nor quartz is floated with NaOL alone, while using DDA alone, they can be separated only at strong acid conditions (pH < 3). Mixed NaOL/DDA collectors exhibits excellent performance in the flotation separation of muscovite from quartz at pH 10. The ratio of the mixed collectors is found to be an important criterion in the flotation tests. The best separation result (muscovite recovery of 80% and quartz recovery of 10%) could be achieved with NaOL/DDA molar ratios of 3/1 and 2/1 at pH 10. The co-adsorption of NaOL and DDA is found on muscovite surface by strong electrostatic interaction, H bonding and chem. adsorption. This study may provide guidance for the flotation mechanism and application of mixed anionic/cationic collectors.

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 C8H16O2, Application of Dodecylamineacetate.

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

Zhu, Yan published the artcileDiscovery of aryl-substituted indole and indoline derivatives as ROR¦Ãt agonists, Formula: C27H23F6NO6S, the publication is European Journal of Medicinal Chemistry (2019), 111589, database is CAplus and MEDLINE.

A series of aryl-substituted indole and indoline derivatives were discovered as novel ROR¦Ãt agonists by a scaffold-based hybridization of the reported ROR¦Ãt agonists 1 and 2. SAR studies on the core structures, the RHS hydrophilic side chains and the LHS hydrophobic aryl groups of a hybrid compound 3 led to the identification of potent ROR¦Ãt agonists with improved drug-like properties. Compound 14 represented a high potency lead with an EC₅₀ of 20.8 ¡À 1.5 nM, the (S)-enantiomer (EC₅₀ = 16.1 ¡À 4.5 nM) of which was 17 times more potent than the (R) counterpart (EC₅₀ = 286 ¡À 30.4 nM) in ROR¦Ã dual FRET assay. The cell-based GAL4 reporter gene assay also suggested 14 as the most active compound which exhibited an EC₅₀ of 247 ¡À 33.1 nM and a maximum activation percentage of 133%. Moreover, 14 showed high metabolic stability (t_1/2 = 113 min) in mouse liver microsome and had improved aqueous solubility at pH 7.4 compared to the parent compounds Furthermore, 14 was found to be orally bioavailable and demonstrated excellent in vivo pharmacokinetics in mice. Present studies indicate that 14 deserves further investigation in tumor animal models as a potential candidate of ROR¦Ãt agonist for cancer immunotherapy.

European Journal of Medicinal Chemistry published new progress about 2055536-64-4. 2055536-64-4 belongs to catalysis-chemistry, auxiliary class Metabolic Enzyme,ROR, name is (S)-3-(6-(3-(Difluoromethoxy)-5-fluorophenyl)-4-((3-(trifluoromethyl)phenyl)sulfonyl)-3,4-dihydro-2H-benzo[b][1,4]oxazin-2-yl)-2,2-dimethylpropanoic acid, and the molecular formula is C38H74Cl2N2O4, Formula: C27H23F6NO6S.

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

Gao, Enjun published the artcileSpiral frameworks constructed by 1,2-phenylene-dioxydiacetic acid as highly sensitive and selective luminescent probes to detect PO₄^3- ions in aqueous solutions, Application of 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is RSC Advances (2016), 6(89), 85704-85709, database is CAplus.

Three novel clubbed photo-luminescent lanthanide-organic frameworks 1D coordination polymers, [Ln(L)(NO₃)(H₂O)₂]_n (1-3) (where Ln is La, Ce, and Pr, resp., and H₂L = 1,2-phenylenedioxydiacetic acid), have been synthesized in a concise and reproducible manner under hydrothermal conditions. It is worth noting that the H₂L ligand is used for the first time in synthesis complexes. 1, 2 and 3 possess same structure with the same topol. of [3^3; 4^2; 5] built using Ln-L 1D helical chains. Fluorescence properties of the obtained complexes have been studied in detail, revealing that 3 can sensitively and selectively detect pollutant PO₄^3- among various anions.

RSC Advances published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H10O6, Application of 2,2-(1,2-Phenylenebis(oxy))diacetic acid.

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

Yao, Wei published the artcilePhoto-induced C-H bond activation of N,N’-dialkylethylenediamine upon aza-Michael addition to 1,8-pyrenedione: facile synthesis of fluorescent pyrene derivatives, Application In Synthesis of 140-28-3, the publication is Organic Chemistry Frontiers (2018), 5(10), 1679-1683, database is CAplus.

Reaction between 1,8-pyrenedione and N,N’-dialkylethylenediamine to form highly fluorescent products, via aza-Michael addition followed by double C-H activation facilitated by visible light is discovered. Remarkably, the reaction intermediates and mono C-H bond activation product could only be formed when the reaction was carried out in the presence of a base and UV-light (254 nm). Dehydrogenation of the intermediate under room lighting converts it to the final products. The reaction is a general one as it works with a number of ethylenediamines with different substituents. The reaction mechanisms suggested that nucleophilic addition of the amine followed by dehydrogenation occurs to restore aromaticity and give an amine substituted 1,8-pyrenedione intermediate. The C-H activation requires photoexcitation via a radical mechanism. This work opens a new avenue for the construction of novel mols. with a pyrene core as a fluorophore with good quantum yields.

Organic Chemistry Frontiers 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 C6H13NO2, Application In Synthesis of 140-28-3.

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