Catalysis-chemistry

Molaei, Somayeh published the artcileCu(II) and Cd(II) anchored functionalized mesoporous SBA-15 as novel, highly efficient and recoverable heterogeneous catalysts for green oxidative coupling of thiols and C-S cross-coupling reaction of aryl halides, Recommanded Product: 2,2′-Dithiodibenzoic acid, the publication is Polyhedron (2018), 35-47, database is CAplus.

Two novel heterogeneous catalysts have been synthesized by anchoring Cu(II) and Cd(II) creatinine complexes onto the surface of mesochannels of SBA-15 and used as catalysts for highly efficient oxidation of thiols to disulfides with hydrogen peroxide and for synthesis of sym. diaryl sulfides from aryl halides using S₈ and KOH. The structure of the prepared catalysts was determined using SEM, FT-IR, X-ray diffraction, elemental anal., N₂ adsorption-desorption anal. and TGA. The catalysts could be reused several times without appreciable loss in their activity.

Polyhedron 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, Recommanded Product: 2,2′-Dithiodibenzoic acid.

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

Molaei, Somayeh published the artcileHighly Efficient Oxidative Coupling of Thiols and Oxidation of Sulfides in the Presence of MCM-41@Tryptophan-Cd and MCM-41@Tryptophan-Hg as Novel and Recoverable Nanocatalysts, Quality Control of 119-80-2, the publication is Catalysis Letters (2018), 148(7), 1834-1847, database is CAplus.

Abstract: Two heterogeneous catalysts, MCM-41@Tryptophan-Cd and MCM-41@Tryptophan-Hg, were synthesized by immobilization of Cd or Hg complexes on MCM-41 as novel, efficient, recoverable and stable nanocatalysts for Oxidation of sulfides to sulfoxides and oxidative coupling of thiols into their corresponding disulfides. These functionalized complexes were characterized by FT-IR spectroscopy, thermogravimetric anal. (TGA), powder X-ray diffraction (XRD) and N₂ adsorption-desorption isotherms. The designed catalysts successfully oxidized a variety of sulfides and thiols with short reaction times in high to excellent yields at room temperature and recovered for several times without significant loss of their catalytic activity. Graphical Abstract: Synthesis of Cd and Hg tryptophan complexes immobilized on to surface of mesoporous MCM-41 under mild reaction conditions has been presented. After characterization of these catalysts, their catalytic activity has been investigated for the synthesis of sulfoxide and disulfides derivatives [Figure not available: see fulltext.].

Catalysis Letters 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, Quality Control of 119-80-2.

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

Moeini, Nazanin published the artcileAnchoring Ni (II) on Fe₃O₄@tryptophan: A recyclable, green and extremely efficient magnetic nanocatalyst for one-pot synthesis of 5-substituted 1H-tetrazoles and chemoselective oxidation of sulfides and thiols, Product Details of C14H10O4S2, the publication is Applied Organometallic Chemistry (2018), 32(9), n/a, database is CAplus.

A green, novel and extremely efficient nanocatalyst was successfully synthesized by the immobilization of Ni as a transition metal on Fe₃O₄ nanoparticles coated with tryptophan. This nanostructured material was characterized using Fourier transform IR spectroscopy, transmission electron microscopy, SEM, energy-dispersive X-ray spectroscopy, thermogravimetric anal., inductively coupled plasma optical emission spectroscopy, vibrating sample magnetometry and X-ray diffraction. The prepared nanocatalyst was applied for the oxidation of sulfides, oxidative coupling of thiols and synthesis of 5-substituted 1H-tetrazoles. The use of non-toxic, green and inexpensive materials, easy separation of magnetic nanoparticles from a reaction mixture using a magnetic field, efficient and one-pot synthesis, and high yields of products are the most important advantages of this nanocatalyst.

Applied Organometallic Chemistry 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, Product Details of C14H10O4S2.

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

Veisi, Hojat published the artcileAn efficient clean methodology for the C-S coupling to aryl thioethers and S-S homocoupling to aromatic disulfides catalyzed over a Ce(IV)-leucine complex immobilized on mesoporous MCM-41, Product Details of C14H10O4S2, the publication is New Journal of Chemistry (2019), 43(26), 10343-10351, database is CAplus.

A novel Ce(IV)-anchored L-leucine covalently bonded to mesoporous MCM-41 has been synthesized by a non-hydrothermal post-functionalization approach. It has been thoroughly characterized by sophisticated physicochem. techniques. The material was applied in the efficient green synthesis of aromatic sulfides by C-S coupling using mol. sulfur and haloarenes. Another catalytic application was in the synthesis of sym. disulfides by the homocoupling of aromatic thiols in the presence of H₂O₂ as an oxidant. The ligand-free protocol is simple, clean and free from hazardous chems. Moreover, the catalyst is reusable for several times, thus making the methodol. sustainably viable.

New Journal of Chemistry 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 C10H10O2, Product Details of C14H10O4S2.

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

Kawachi, Atsushi published the artcileStructures of [(Amino)phenylsilyl]lithiums and Related Compounds in Solution and in the Solid State, Category: catalysis-chemistry, the publication is Journal of the American Chemical Society (2000), 122(9), 1919-1926, database is CAplus.

The solution structures of [bis(diethylamino)phenylsilyl]lithium (1), [(diethylamino)diphenylsilyl]lithium (2), and [(diethylamino)phenylmethylsilyl]lithium (3) were studied by ¹³C, ²⁹Si, ⁷Li, and ¹⁵N NMR spectroscopic experiments The ²⁹Si-⁷⁽⁶⁾Li coupling can be observed in each species at low temperature The coupling patterns indicate that these three species exist as monomers in THF. Using a ¹⁵N-enrichment technique, the ²⁹Si-¹⁵N couplings in 1 and 2 are observed Next, the solid-state structures of [(diphenylamino)diphenylsilyl]lithium ((Ph₂N)Ph₂Si-X; X = Li) (4) and its fluoro (X = F), stannyl (X = SnMe₃), and hydro (X = H) derivatives were revealed by crystallog. studies as well as by solid-state ²⁹Si NMR experiments In the solid state, 4 exists as a monomer solvated with three THF mols. arising from the reaction solvent. The electropos. substituent X, such as Li, causes the elongation of the Si-C and Si-N bonds, reduction of the sum of the C-Si-N (or C) angles, and a downfield shift of the ²⁹Si resonances.

Journal of the American Chemical Society published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Category: catalysis-chemistry.

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

Shirase, Satoru published the artcileCerium(IV) Carboxylate Photocatalyst for Catalytic Radical Formation from Carboxylic Acids: Decarboxylative Oxygenation of Aliphatic Carboxylic Acids and Lactonization of Aromatic Carboxylic Acids, COA of Formula: C8H7NO4, the publication is Journal of the American Chemical Society (2020), 142(12), 5668-5675, database is CAplus and MEDLINE.

We found that in situ generated cerium(IV) carboxylate generated by mixing the precursor Ce(O^tBu)₄ with the corresponding carboxylic acids served as efficient photocatalysts for the direct formation of carboxyl radicals from carboxylic acids under blue light-emitting diodes (blue LEDs) irradiation and air, resulting in catalytic decarboxylative oxygenation of aliphatic carboxylic acids to give C-O bond-forming products such as aldehydes and ketones. Control experiments revealed that hexanuclear Ce(IV) carboxylate clusters initially formed in the reaction mixture and the ligand-to-metal charge transfer nature of the Ce(IV) carboxylate clusters was responsible for the high catalytic performance to transform the carboxylate ligands to the carboxyl radical. In addition, the Ce(IV) carboxylate cluster catalyzed direct lactonization of 2-isopropylbenzoic acid to produce the corresponding peroxy lactone and ¦Ã-lactone via intramol. 1,5-hydrogen atom transfer (1,5-HAT).

Journal of the American Chemical Society published new progress about 104-03-0. 104-03-0 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Carboxylic acid,Benzene, name is 4-Nitrophenylacetic acid, and the molecular formula is C6H16OSi, COA of Formula: C8H7NO4.

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

Lautens, Mark published the artcileCobalt-Catalyzed [2¦Ð + 2¦Ð + 2¦Ð] (Homo-Diels-Alder) and [2¦Ð + 2¦Ð + 4¦Ð] Cycloadditions of Bicyclo[2.2.1]hepta-2,5-dienes, HPLC of Formula: 4141-48-4, the publication is Journal of the American Chemical Society (1995), 117(26), 6863-79, database is CAplus.

The scope of the cobalt-catalyzed [2¦Ð + 2¦Ð + 2¦Ð] (homo-Diels-Alder, HDA) and [2¦Ð + 2¦Ð + 4¦Ð] cycloaddition reactions with norbornadienes has been investigated. Cobalt acetylacetonate, Co(acac)₃ or Co(acac)₂, upon reduction by diethylaluminum chloride (Et₂AlCl) in the presence of 1,2-bis(diphenylphosphino)ethane (dppe), is very effective in promoting the HDA reaction between norbornadiene and a variety of unactivated acetylenes to yield deltacyclenes. Azeotropic drying of the cobalt compound before use is found to increase the reactivity of the catalyst. Moderate to excellent enantioselectivity of these [2¦Ð + 2¦Ð + 2¦Ð] (up to 91% ee) and [2¦Ð + 2¦Ð + 4¦Ð] (up to 79% ee) cycloadditions can be achieved by the use of a chiral phosphine. 7-Substituted norbornadienes are also found to be reactive in the cobalt-catalyzed HDA reactions, affording the corresponding deltacyclenes in good yields. However, low anti/syn selectivities are observed, in contrast with the corresponding nickel-catalyzed HDA reaction with electron-deficient dienophiles. 2-Substituted norbornadienes are found to be less reactive in the cobalt-catalyzed HDA reactions, and the regio- and stereoselectivities are only moderate. The intramol. versions of these [2¦Ð + 2¦Ð + 2¦Ð] and [2¦Ð + 2¦Ð + 4¦Ð] cycloadditions have also been investigated and provide efficient methods for the construction of highly strained pentacyclic frameworks from norbornadiene.

Journal of the American Chemical Society published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C15H15OP, HPLC of Formula: 4141-48-4.

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

Peng, Wentong published the artcileInfluence of fermented feed additive on gut morphology, immune status, and microbiota in broilers, Quality Control of 63-68-3, the publication is BMC Veterinary Research (2022), 18(1), 218, database is CAplus and MEDLINE.

This study examined the effects of a solid-state fermented feed additive (FFA) on the small intestine histol./morphol., immunity and microbiota of broilers. Two hundred eighty-eight day-old Arbor Acre chicks, were randomly assigned to one of four groups (each group has 6 replicates, with each replicate containing 12 chickens). The neg. control (NC; basal diet), the pos. control (PC; basal diet +antibiotic 15 ppm), the fermented feed additive low dose (FFL; basal diet + 0.3 kg/t FFA), and the fermented feed additive high dose (FFH; 3 kg/t FFA) with Lactobacillus casei (L.casei). The study found that the FFH and FFL groups gained more weight (1-21d) and the FFL and PC diets had better feed conversion ratio (P < 0.05) than the NC from 0-42d. The FFH group had higher villus height (P < 0.05) in the duodenum than the PC and villus height to crypt depth ratio VH/CD compared to PC and FFL groups. The FFL chickens had greater (P < 0.05) jejunal and ileal villus height than PC and NC groups resp. The FFL group had a higher ileal VH/CD ratio (P < 0.05). Jejunum VH/CD was higher in FFL and FFH (P < 0.05) than PC (P < 0.05). FFH had a smaller thymus than NC (P < 0.05). FFA diets also increased IL-10 expression (P < 0.05). While IL-1 and TLR4 mRNA expression decreased (P < 0.05) compared to NC. The microbiota anal. showed that the microorganisms that have pathogenic properties such as phylum Delsulfobacterota and class Desulfovibriona and Negativicutes was also significantly reduced in the group treated with FFH and PC while microorganisms having beneficial properties like Lactobacillaceae family, Lactobacillus aviarus genus and Lactobacillus spp were also tended to increase in the FFH and FFL fermented feed groups compared to the PC and NC groups. These findings suggested that the FFA diet may modulate cecal microbiota by reducing pathogenic microorganisms such as phylum Delsulfobacterota and class Desulfovibriona and Negativicutes improve beneficial microorganisms like Lactobacillaceae family, Lactobacillus aviarus genus and Lactobacillus spp. While FFA diet also affect immunity, and gene expression related to immunity.

BMC Veterinary Research 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, Quality Control of 63-68-3.

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

Lu, Peng published the artcileNMR and HPLC profiling of bee pollen products from different countries, Synthetic Route of 63-68-3, the publication is Food Chemistry: Molecular Sciences (2022), 100119, database is CAplus and MEDLINE.

Bee pollen, a beehive product collected from flowers by honeybees, contains over 250 biol. substances, and has attracted increasing attention as a functional food. However, com. bee pollen products are often multifloral, and samples from different countries vary significantly. There is no universal standard for objective quality assessment of bee pollen based on its chem. composition Here, we report metabolomic anal. of 11 bee pollen samples from Spain, China, and Australia for quality control. The characteristics of the samples depend on the sucrose, nucleoside, amino acid, and flavanol concentrations Bee pollen samples from Spain and Australia had higher sucrose and adenosine concentrations, whereas those from China had higher trigonelline, uridine, and cytidine concentrations Interestingly, acetic acid was only detected in samples from China. These components can be used to identify the country of origin. The obtained profiles of the samples will contribute to universal standard development for bee pollen products.

Food Chemistry: Molecular Sciences 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, Synthetic Route of 63-68-3.

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

Kamada, Kei published the artcileGrowth of N-benzyl-2-methyl-4-nitroaniline (BNA) single crystal fibers by micro-pulling down method, Computed Properties of 201157-13-3, the publication is Journal of Crystal Growth (2016), 162-165, database is CAplus.

N-benzyl-2-methyl-4-nitroaniline (BNA) fiber single crystals were grown by the micro-pulling down (¦Ì-PD) method. Crucible material and its shape were selected based on wetting of the crucible material by liquid BNA. As a result, BNA fiber single crystal with about 1-2 mm diameter was successfully grown. Powder XRD anal. and X-ray rocking curve measurements were performed. Widely-tunable THz-wave generation from 4 THz to 14 THz was demonstrated using the BNA fiber crystal grown by ¦Ì-PD method.

Journal of Crystal Growth 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 C14H14N2O2, Computed Properties of 201157-13-3.

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