Catalysis-chemistry

Guo, Xin published the artcileEffect of traditional chinese medicine (TCM) and its fermentation using Lactobacillus plantarum on ceftriaxone sodium-induced dysbacteriotic diarrhea in mice, Application of (S)-2-Amino-4-(methylthio)butanoic acid, the publication is Chinese Medicine (London, United Kingdom) (2022), 17(1), 20, database is CAplus and MEDLINE.

Buzhongyiqi decoction (BD), Sijunzi decoction (SD), and Shenlingbaizhu decoction (SHD) have been extensively used clin. for the treatment of diseases caused by spleen-Qi deficiency and microbial fermentation has historically been utilized in traditional Chinese medicine (TCM). This study aimed to investigate the mitigative effect of TCM and fermented TCM (FTCM) with Lactobacillus plantarum (LP) on antibiotic-associated diarrhea, and to select an optimal formula and then identify its compounds Dysbacteriosis in mice was induced by ceftriaxone sodium (CS). The mice were then treated with LP, BD, SD, SHD, fermented BD, fermented SD (FSD), and fermented SHD. Diarrhea indexes, the abundances of gut bacteria, intestinal morphometrics, and mRNA expressions of genes related to intestinal barrier function were assessed. Then, ultra-high-performance liquid chromatog. coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF/MS) were employed to identify and relatively quantify the compounds in the selected decoctions. CS significantly increased the fecal output weight, the total number of fecal output, and fecal water content, indicating the occurrence of diarrhea. Bacterial culture tests showed that the above symptoms were accompanied by the disruption of specific intestinal flora. TCM, LP, and FTCM alleviated the diarrhea index and recovered the intestinal microbiota. FTCM showed more advantageous than TCM or LP alone. The mRNA expressions of aquaporins (AQPs) and tight junctions (TJs) decreased by CS were enhanced by TCM, LP, and FTCM. In addition, through UHPLC-Q-TOF/MS, (S)-(-)-2-hydroxyisocaproic acid, L-methionine, 4-guanidinobutyric acid (4GBA), and phenyllactate (PLA) in SD and FSD were identified and relatively quantified. TCM, LP, and TCM fermented with LP alleviated CS-induced diarrhea symptoms, and improved the intestinal flora and barrier function. Four compounds including (S)-(-)-2-hydroxyisocaproic acid, L-methionine, 4GBA, and PLA in FSD, which were identified by UHPLC-Q-TOF/MS, might function in modulating intestinal flora and improving villi structure.

Chinese Medicine (London, United Kingdom) published new progress about 63-68-3. 63-68-3 belongs to catalysis-chemistry, auxiliary class Natural product, name is (S)-2-Amino-4-(methylthio)butanoic acid, and the molecular formula is C5H11NO2S, Application of (S)-2-Amino-4-(methylthio)butanoic acid.

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

Xiao, Yan-shuang published the artcileDesign, synthesis and fungicidal activity of 11-alkoxyimino-5,6-dihydro-dibenzo[b,e] azepine-6-one derivatives, HPLC of Formula: 6084-58-8, the publication is Pest Management Science (2013), 69(7), 814-826, database is CAplus and MEDLINE.

Background: Macrocyclic compounds with an oxime ether side chain are known to show good fungicidal activity. However, the long synthetic route makes the cost too high for them to be developed further as practical fungicides. Alternative compounds with good fungicidal activity and an easier synthesis than these macrolactams were sought, and a series of 11-alkoxyimino-5,6-dihydro-dibenzo[b,e]azepine-6-one derivatives (I; R = alkyl, etc.; X = H, Cl, Br, or I) were designed and bioassayed. Results: The structures were confirmed by ¹H NMR, ¹³C NMR and LC-MS. The bioassay showed that about half of the 11-alkoxyimino-5,6-dihydro-dibenzo[b,e]azepine-6-one derivatives displayed good fungicidal activity against Sclerotinia sclerotiorum, with EC₅₀ values <15 ¦Ìg mL^-1. 11-(N-Butyloxyimino)-5,6-dihydro-dibenzo[b,e]azepine-6-one, 11-(4-nitrobenzyloxyimino)-5,6-dihydro-dibenzo[b,e]azepine-6-one, and 11-(2-chloro-6-fluorobenzyloxyimino)-5,6-dihydro-dibenzo[b,e]azepine-6-one displayed excellent fungicidal activity, with EC₅₀ values of <2.5 ¦Ìg mL^-1, much better than the com. fungicide chlorothalonil with an EC₅₀ value of 7.16 ¦Ìg mL^-1. In addition, about half of the 11-alkoxyimino-5,6-dihydro-dibenzo[b,e]azepine-6-one derivatives had good fungicidal activity against Botrytis cinerea, with EC₅₀ values of <10 ¦Ìg mL^-1. 11-(2-Fluorobenzyloxyimino)-5,6-dihydro-dibenzo[b,e]azepine-6-one, 11-(3-fluorobenzyloxyimino)-5,6-dihydro-dibenzo[b,e]azepine-6-one, and 11-(2-chloro-6-fluorobenzyloxyimino)-5,6-dihydro-dibenzo[b,e]azepine-6-one displayed excellent fungicidal activity, with EC₅₀ values of 3.73, 2.54 and 3.20 ¦Ìg mL^-1 resp., comparable with the com. fungicide procymidone with an EC₅₀ value of 2.45 ¦Ìg mL^-1. Their structure-activity relationship is discussed. ? 2013 Society of Chem. Industry.

Pest Management Science published new progress about 6084-58-8. 6084-58-8 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is O-Isobutylhydroxylamine hydrochloride, and the molecular formula is C13H18BClO3, HPLC of Formula: 6084-58-8.

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

Xiao, Yanshuang published the artcileSynthesis and fungicidal activity of 4-alkyloxyiminohexanolactone derivatives, Name: O-Isobutylhydroxylamine hydrochloride, the publication is Nongyaoxue Xuebao (2009), 11(1), 55-58, database is CAplus.

The title compounds [i.e., 4-[(alkoxy)imino]hexanolactone derivatives] were obtained by a reaction of cyclohexanedione, formation of 2,5-oxepanedione and subsequent oximation and the product structures were confirmed by NMR and elemental anal., MS. A preliminary bioassay indicated that some compounds possess fungicidal activity against Phytophthora parasitica (Phytophthora nicotianae), Rhizoctonia solani, Botrytis cinerea, Sclerotinia sclerotiorum (Whetzelinia sclerotiorum), Puccinia asparagi.

Nongyaoxue Xuebao published new progress about 6084-58-8. 6084-58-8 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is O-Isobutylhydroxylamine hydrochloride, and the molecular formula is C14H31NO2, Name: O-Isobutylhydroxylamine hydrochloride.

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

Niu, Junjian published the artcileElectrically switched ion exchange film with molecular coupling synergistically-driven ability for recovery of Ag⁺ ions from wastewater, Application In Synthesis of 119-80-2, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2020), 124498, database is CAplus.

An elec. switched ion exchange film with mol. coupling synergistically-driven ability for the selective recovery of Ag⁺ ions is developed by coupling a conducting polypyrrole (PPy) with a 2, 2′-dithiosalicylic acid (DTSA) at mol. scale. The rapid and selective uptake/release of Ag⁺ ions by this hybrid film was found to be realized by the electrochem. circulation of the PPy ? PPyⁿ⁺ as well as the disulfide ? dithiolate and the recognition ability of the carboxyl groups and disulfide bonds of DTSA. As a result, the recovery of Ag⁺ ions can be handily achieved by adjusting the operating potential applied on the hybrid film coated electrode. The electrochem. quartz crystal microbalance measurements combined with the cyclic voltammetric technique, XPS and d. functional theory computations were performed to identify the uptake/release mechanism of the hybrid film. Furthermore, the uptake capacity of the hybrid film maintained almost invariable after 10 consecutive uptake/release cycles, and the regeneration rate of Ag⁺ ions remained over 80% in each cycle. It is expected that such an electroactive hybrid film can be applied for the recovery of Ag⁺ ions from various industrial discharges.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C14H10O4S2, Application In Synthesis of 119-80-2.

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

Jiang, Ling published the artcileCatalyst-free one-pot three-component rapid synthesis of polysubstituted pyrroles by liquid-assisted grinding, HPLC of Formula: 4230-93-7, the publication is Journal of Heterocyclic Chemistry, database is CAplus.

A series of polysubstituted pyrroles were rapidly synthesized in moderate to good yields via catalyst-free one-pot three-component reaction of 1,3-dicarbonyl compounds with primary amines and nitrostyrenes by using liquid-assisted grinding. This protocol provided several advantages over the conventional chem. synthesis, such as simple work-up procedure, wide substrate scope, short reaction time and environmental friendliness. Structures of polysubstituted pyrroles were confirmed by ¹H NMR, ¹³C NMR and ESI-MS studies.

Journal of Heterocyclic Chemistry published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C10H11NO4, HPLC of Formula: 4230-93-7.

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

Yu, Fuchao published the artcileThree-component solvent-free synthesis of highly substituted tetrahydroimidazo[1,2-a]pyridines, Recommanded Product: 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, the publication is RSC Advances (2011), 1(4), 596-601, database is CAplus.

An efficient and green method was developed for the synthesis of tetrahydroimidazo[1,2-a]pyridines by three-component reactions of heterocyclic ketene aminals, triethoxymethane, and nitro alkenes in one-pot in the absence of catalyst and solvent. This protocol has advantages of environmental friendliness, high yields (73-93%), short reaction time and convenient operation.

RSC Advances published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C7H5ClN2S, Recommanded Product: 1,2-Dimethoxy-4-(2-nitrovinyl)benzene.

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

Hu, Wenbo published the artcileRhodium(III)-Catalyzed Three-Component Cascade Annulation for Modular Assembly of N-Alkoxylated Isoindolin-1-Ones with Quaternary Carbon Center, Recommanded Product: 2-Methylbenzoic acid, the publication is Advanced Synthesis & Catalysis (2022), 364(15), 2589-2595, database is CAplus.

A cascade C-H activation, annulation and etherification of N-hydroxybenzamides with propargylamines provided a flexible route to N-alkoxylated 3-arylisoindolin-1-ones. Three new bonds (C-C, C-N, and C-O) were generated to afford a series of isoindolin-1-ones bearing a tetrasubstituted carbon in 49-82% yield. The utility of this method was showcased by gram-scale synthesis and synthetic transformations of the product to access structurally diverse isoindolinones.

Advanced Synthesis & Catalysis published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Recommanded Product: 2-Methylbenzoic acid.

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

Yang, Hailong published the artcileIron-catalyzed direct alkenylation of sp³(C-H) bonds via decarboxylation of cinnamic acids under ligand-free conditions, Computed Properties of 1772-76-5, the publication is Green Chemistry (2013), 15(4), 976-981, database is CAplus.

An example of highly efficient low-cost ferrocene-catalyzed decarboxylative C(sp²)-C(sp³) coupling reactions via C-H functionalization has been developed successfully. It is noteworthy that nanoparticles of Fe₃O₄ could be used as a reusable catalyst for 7 times in the absence of ligand.

Green 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 C7H7ClN2, Computed Properties of 1772-76-5.

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

Wabuyele, Musundi B. published the artcileSurface-enhanced Raman scattering molecular nanoprobes, Formula: C18H15N3O3, the publication is Proceedings of SPIE-The International Society for Optical Engineering (2005), 209-215, database is CAplus.

Nanoparticles are increasingly finding a wide application in the biol. studies due to their unique phys. and chem. properties. Colloidal nanoparticles are efficient substrate that exhibit surface-enhanced Raman scattering (SERS) phenomenon by enhancing the scattering cross-sections of conjugated Raman active mols. thus enabling highly sensitive biol. probes. However, biol. and medical applications would require nanoparticles to be conjugated to biomols. A universal approach for conjugation of mercarptoacetic acid-capped silver nanoparticles to biomols. is described. The surface functionalized silver colloids were labeled with a Raman active dye and used for cellular imaging. We also described the use of silver nanoparticle to develop a new class of SERS nanoprobes for mol. recognition and detection of specific nucleic acid sequences.

Proceedings of SPIE-The International Society for Optical Engineering published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C8H15NO, Formula: C18H15N3O3.

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

Wabuyele, Musundi B. published the artcileHyperspectral surface-enhanced Raman imaging of labeled silver nanoparticles in single cells, COA of Formula: C18H15N3O3, the publication is Review of Scientific Instruments (2005), 76(6), 063710/1-063710/7, database is CAplus.

We describe the development of an acousto-optic tunable filter (AOTF)-based hyperspectral surface-enhanced Raman imaging (HSERI) system equipped with an intensified charged coupled device and an avalanche photodiode. The AOTF device is a miniature rapid-scanning solid-state device that has no moving parts and can be rapidly tuned (microseconds) either sequentially or randomly, over a wide spectral range between 600 and 900 nm [corresponding to a large relative wave number range (?0-4500 cm^-1)], with respect to a 632.8 nm excitation and can also acquire images at a fairly narrow band of ?7 cm^-1. In this article we describe a confocal surface-enhanced Raman imaging (SERI) system developed in our laboratory that combines hyperspectral imaging capabilities with surface-enhanced Raman scattering (SERS) to identify cellular components with high spatial and temporal resolution The HSERI system’s application to cellular imaging is demonstrated using SERS-labeled nanoparticles in cellular systems.

Review of Scientific Instruments published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C14H23N, COA of Formula: C18H15N3O3.

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