Catalysis-chemistry

Choi, Zel-Ho published the artcileOn the chemistry of fluoroorgano derivatives of Group 13 elements. Part 2. Synthesis and characterization of the 1:1-adducts of In(C₆F₅)₃ with acetonitrile, glyme, and DMAP [DMAP = 4-(N,N-dimethylamino)pyridine], and [PNP][In(C₆F₅)₄] [PNP = bis(triphenylphosphine)immonium]. The crystal structure of [PNP][In(C₆F₅)₄], COA of Formula: C9H9F5Si, the publication is Zeitschrift fuer Anorganische und Allgemeine Chemie (1999), 625(8), 1287-1292, database is CAplus.

In(C₆F₅)₃.MeCN and In(C₆F₅)₃.glyme were synthesized from InCl₃ and Cd(C₆F₅)₂ in MeCN or glyme in 43% and 35% yield, resp. Replacement of MeCN or Et₂O by DMAP yielded the corresponding 1:1-adduct. [PNP][In(C₆F₅)₄] was best prepared from the corresponding Cs salt which was best synthesized from the reaction of stoichiometric amounts of In(C₆F₅)₃.MeCN, Me₃SiC₆F₅, and CsF in good yield. [PNP][In(C₆F₅)₄] crystallizes in the triclinic space group P1? [a 1104.9(4), b 1442.4(6), c 1833.8(8) pm, ¦Á 110.87(2), ¦Â 92.04(3), ¦Ã 96.55(3)¡ã, Z = 2].

Zeitschrift fuer Anorganische und Allgemeine Chemie published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C9H9F5Si, COA of Formula: C9H9F5Si.

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

Piela, Katarzyna published the artcilePolymorphism and cold crystallization in optically nonlinear N-benzyl-2-methyl-4-nitroaniline crystal studied by X-ray diffraction, calorimetry and Raman spectroscopy, Quality Control of 201157-13-3, the publication is Journal of Molecular Structure (2011), 991(1-3), 42-49, database is CAplus.

Polymorphism of N-benzyl-2-methyl-4-nitroaniline (BNA), a terahertz emitter and frequency doubler, was detected and the crystal structures of orthorhombic and monoclinic polymorphs have been determined at room temperature The differential scanning calorimetry (DSC) revealed monotropic phase transition of the monoclinic BNA crystal at 362 K and during re-heating, after the molten BNA cooling, the cold crystallization of both polymorphs. The variable-temperature Raman spectra in the 700-1700 cm^-1 range evidenced the polymorphic transformation from the monoclinic to the orthorhombic structure, the latter stable in the wide temperature range. The comparison of the crystal structures, DSC curves, FT-IR and Raman spectra of the two polymorphs allowed the authors to recognize the N-H¡¤¡¤¡¤O hydrogen bond in the orthorhombic and C-H¡¤¡¤¡¤O hydrogen bond in the monoclinic one as well as other intermol. interactions. The role of dynamic disorder, intra- and intermol. charge transfers in the mol. mechanism of optical nonlinearity is discussed.

Journal of Molecular Structure 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, Quality Control of 201157-13-3.

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

Li, Yankun published the artcileSynthesis of Benzofuran Derivatives via a Gold-Catalyzed Claisen Rearrangement Cascade, Computed Properties of 312-40-3, the publication is Organic Letters (2022), 24(31), 5829-5834, database is CAplus and MEDLINE.

A novel method toward a facile synthesis of diverse benzofuran derivatives I [R = Me, Et, Ph, etc.; R¹ = Me, Et] from easily obtained quinols and alkynyl esters was reported. A gold-catalyzed intermol. alkoxylation/Claisen rearrangement/condensation cascade was involved. The introduction of difluorodiphenylsilane as a water-trapping reagent in the reaction led to a higher yield.

Organic Letters 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, Computed Properties of 312-40-3.

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

Rao, Ramakoteswara published the artcilePolyethylene glycol (PEG-400) as an efficient and recyclable reaction media for the synthesis of substituted 4-(1-aryl-2-nitroethyl)-3-methyl-1H-pyrazol-5-ol in catalyst free conditions, Formula: C10H11NO4, the publication is Journal of Chemical and Pharmaceutical Research (2015), 7(8), 1031-1035, database is CAplus.

Polyethylene glycol (PEG-400) was found to be an effective reaction medium for the one-pot synthesis of 4-(1-aryl-2-nitroethyl)-3-methyl-1H-pyrazol-5-ol derivatives in good yields under mild reaction conditions. The use of PEG-400 makes this method low cost, recyclable, and eco-friendly.

Journal of Chemical and Pharmaceutical Research 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, Formula: C10H11NO4.

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

Yoshida, Jun-ichi published the artcileDirect Conversion of Hydrosilanes to Fluorosilanes with CuF₂¡¤2H₂O/CCl₄, SDS of cas: 312-40-3, the publication is Organometallics (1995), 14(1), 567-9, database is CAplus.

The reaction of hydrosilanes, e.g., Ph₃SiH, with Cu^IIF₂¡¤2H₂O in refluxing CCl₄ gave the corresponding fluorosilanes, e.g., Ph₃SiF, in good yields. In THF hydrosilanes were recovered unchanged. X-ray powder anal. of the solid products indicated the formation of Cu^ICl. Probably both CCl₄ and Cu^II act as oxidants for hydrosilanes.

Organometallics 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 C12H10O4S, SDS of cas: 312-40-3.

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

Matsuo, Kimiko published the artcileThe effects of polyamines on the melting of poly(inosinic acid) plus poly(cytidylic acid) complex in solution, Synthetic Route of 10517-44-9, the publication is Bulletin of the Chemical Society of Japan (1966), 39(2), 347-52, database is CAplus and MEDLINE.

The thermal transition profile (melting profile) of the double-helical complex of poly(inosinic acid) and poly(cytidylic acid), poly (I + C), into random coils in solution was examined by observation of the absorbance at 248 m¦Ì. Increased cation concentrations raised the transition temperature (Tm) and made the transition more rapidly reversible. CH₃NH₃⁺, Na⁺, NH₄⁺, and Mg⁺⁺ were increasingly effective in that order. Diamines of the type ⁺H₃N-(CH₂)_n-NH₃₊ also raised Tm, the most effective being that with n = 3. Spermidine was even more effective, and spermine the most effective compound tested. Actinomycin D had little effect on Tm. Poly-L-lysine formed a complex with poly (I + C) with a stoichiometric molar ratio of NH₂😛 = 0.5:1.

Bulletin of the Chemical Society of Japan published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, Synthetic Route of 10517-44-9.

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

Higuchi, Shigesada published the artcileEffects of polyamines on the melting of poly(riboadenylic acid) plus poly(ribouridylic acid) complexes in a solution, SDS of cas: 10517-44-9, the publication is Bulletin of the Chemical Society of Japan (1966), 39(9), 1886-93, database is CAplus and MEDLINE.

The effects of polyamines on the melting of poly(riboadenylic acid) (I) and poly(ribouridylic acid) (II) were studied, where melting is defined as a transition in solution from the double (or triple) helical conformation into random coils. I was obtained com., and II was prepared from polynucleotide phosphorylase obtained from Azotobacter vinelandii; the organism was precipitated from cold EtOH, dissolved in water, deproteinized by CHCl₃, dialyzed against an aqueous solution of 0.01M ethylene diamine tetraacetate, a M NaCl solution, and distilled water, and was then lyophilized. Ultracentrifugal sedimentation measurements and uv absorption determinations indicated that a 1:1 complex is formed between I and II. The absorbance was measured at 259 m¦Ì for several mixtures at 18¡ã in several concentrations of NaCl and Na citrate, NaCl, glycylglycine, and ethylenediamine solutions Absorbance observations indicated that a 1:2 complex of I:II was present in 0.1M NaCl + 0.01M glycylglycine buffer. The melting of the polymer mixtures was followed as dependent on the Na⁺ concentration in the solvent. Also, the melting was followed at 259 m¦Ì and 280 m¦Ì for the 1:1 mixture in 0.01M NaCl + 0.001 M Na citrate buffer. A mechanism is suggested for the phenomenon observed The effects of ethylenediamine dihydrochloride, 1,3-diaminopropane-2HCl, 1,4-diaminobutane-2HCl, 1,6-diaminohexane-2HCl, 1,8-diaminooctane-2HCl, and spermine-4HCl on the melting process were studied. Actinomycin D has no effect.

Bulletin of the Chemical Society of Japan published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, SDS of cas: 10517-44-9.

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

Botsi, Sofia published the artcileOne or two-step acid-mediated cyclocondensation process for the preparation of 5-carbethoxy-2-thiouracils from diethyl ethoxymethylenemalonate and thioureas, SDS of cas: 6972-05-0, the publication is Heterocyclic Communications (2007), 13(4), 229-234, database is CAplus.

An acid-mediated synthesis of 5-carbethoxy-2-thiouracils via a one-step cyclocondensation of di-Et ethoxymethylenemalonate and thioureas or under milder reaction conditions, via intermediate thioureidomethylenemalonates, was described here.

Heterocyclic Communications published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, SDS of cas: 6972-05-0.

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

Kuett, Agnes published the artcileStrengths of Acids in Acetonitrile, Product Details of C12H9N3O4, the publication is European Journal of Organic Chemistry (2021), 2021(9), 1407-1419, database is CAplus.

The equilibrium acidity scale (pK_a scale) in acetonitrile has been supplemented by numerous new compounds and new ¦¤pK_a measurements. It now contains altogether 231 acids – over twice more than published previously – linked by 569 ¦¤pK_a measurements and spans between the pK_a values of hydrogen iodide (2.8) and indole (32.57), covering close to 30 orders of magnitude. Measurement results acquired over the last 15 years were added to the scale and new least-squares treatment was carried out. The treatment yielded revised pK_a values for the compounds published previously, with the root mean square difference between revised and previous values 0.04, demonstrating very good stability of the scale. Correlation equations were developed for estimating pK_a values for the studied types of compounds in water, DMSO, DMF, and 1,2-dichloroethane on the basis of pK_a values in acetonitrile. These equations enable predicting pK_a values with an average error around or less than 1 pK_a unit, which is a sufficient accuracy for many applications. The scale is expected to be a useful tool for the widest possible research areas in organic chem., electrochem. power sources, catalysis, etc.

European Journal of Organic Chemistry 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, Product Details of C12H9N3O4.

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

Wang, Xiaofan published the artcileDonor age and body weight determine the effects of fecal microbiota transplantation on growth performance, and fecal microbiota development in recipient pigs, COA of Formula: C5H11NO2S, the publication is Journal of Animal Science and Biotechnology (2022), 13(1), 49, database is CAplus and MEDLINE.

The application of fecal microbiota transplantation (FMT) to improve swine growth performance has been sporadically studied. Most of these studies used a single microbiota source and thus the effect of donor characteristics on recipient pigs¡ä fecal microbiota development and growth performance is largely unknown. In this study, we collected feces from six donors with heavy (H) or light (L) body weight and different ages (d 42, nursery; d 96, growing; and d 170, finisher) to evaluate their effects on the growth performance and fecal microbiota development of recipient pigs. Generally, recipients that received two doses of FMT from nursery and finisher stages donor at weaning (21 ¡À 2 days of age) inherited the donor¡äs growth pattern, while the pigs gavaged with grower stage material exerted a numerically greater weight gain than the control pigs regardless of donor BW. FMT from heavier donors (NH, GH, and FH) led to the recipients to have numerically increased growth compared to their lighter counterparts (NL, GL, and FL, resp.) throughout the growing and most finishing stages. This benefit could be attributed to the enrichment of ASV25 Faecalibacterium, ASV61 Faecalibacterium, ASV438 Coriobacteriaceae_unclassified, ASV144 Bulleidia, and ASV129 Oribacterium and decrease of ASV13 Escherichia during nursery stage. Fecal microbiota transplantation from growing and finishing donors influenced the microbial community significantly in recipient pigs during the nursery stage. FMT of older donors¡ä gut microbiota expedited recipients¡ä microbiota maturity on d 35 and 49, indicated by increased estimated microbiota ages. The age-associated bacterial taxa included ASV206 Ruminococcaceae, ASV211 Butyrivibrio, ASV416 Bacteroides, ASV2 Streptococcus, and ASV291 Veillonellaceae. The body weight differences between GL and GH pigs on d 104 were associated with the increased synthesis of the essential amino acid, lysine and methionine, mixed acid fermentation, expedited glycolysis, and sucrose/galactose degradation Overall, our study provided insights into how donor age and body weight affect FMT outcomes regarding growth performance, microbiota community shifts, and lower GI tract metabolic potentials. This study also provided guidance to select qualified donors for future fecal microbiota transplantation.

Journal of Animal Science and Biotechnology 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 C39H35N5O8, COA of Formula: C5H11NO2S.

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