Catalysis-chemistry

Haga, Kazuo published the artcileCondensation of 1,4-cyclohexanediones and secondary aromatic amines. II. N-phenylation of diarylamines, Category: catalysis-chemistry, the publication is Bulletin of the Chemical Society of Japan (1986), 59(3), 803-7, database is CAplus.

Condensations of 1,4-cyclohexanedione with diphenylamines were investigated to determine the limit of the reaction for the N-phenylation of aromatic secondary amines. 4-Ethoxy-, 4,4′-dimethyl-, and 4,4′-dibromodiphenylamines gave their N-phenylated compounds in 65-94% yields, but 4-hydroxy-, 3-ethoxy-, and 4,4′-bis(dimethylamino)diphenylamines gave poor yields. Nitro-substituted diphenylamines gave N-Ph derivatives in low yields along with N-4-hydroxyphenyl derivatives N,N‘-Diphenyl-p-phenylenediamine and N,N‘-diphenylbenzidine gave the corresponding tetra-N-Ph derivatives in 78-80% yields. The condensation of N-phenyl-1-naphthylamine, N-phenyl-2-naphthylamine, di-2-pyridiylamine, phenothiazine, and carbazole with 1,4-cyclohexanedione also were examined

Bulletin of the Chemical Society of Japan 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, Category: catalysis-chemistry.

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

Soto, H. published the artcileFlotation of apatite from calcareous ores with primary amines, COA of Formula: C14H31NO2, the publication is Minerals & Metallurgical Processing (1985), 2(3), 160-6, database is CAplus.

The role was studied of chem. reaction in the selective adsorption of primary amines on phosphate minerals. Kerosine decreases the collector requirement because the hydrocarbon is coadsorbed with the amine on the mineral surface. The heats of reaction of the aminium ions with phosphate, carbonate, and sulfate were measured. The primary amine ions react with the phosphate ions on the apatite surface because of the strong affinity of the 2 ions. If more amine than necessary to cover the apatite is added the amine is adsorbed by the carbonate and separation of apatite from carbonate mineral is more difficult.

Minerals & Metallurgical Processing 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 C4H6BrFO2, COA of Formula: C14H31NO2.

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

Soto, H. published the artcileSelective flotation of phosphates from dolomite using cationic collectors. I. Effect of collector and nonpolar hydrocarbons, Computed Properties of 2016-56-0, the publication is International Journal of Mineral Processing (1986), 16(1-2), 3-16, database is CAplus.

The flotation behavior of francolite and dolomite with a variety of cationic collectors was studied. Only primary amines were strong collectors of the phosphate mineral. Dolomite was also floatable with primary amines, but from a mixture of francolite and dolomite, the primary amines were uniquely selective towards the phosphate mineral. Adsorption studies carried out with individual minerals showed that the collector was strongly adsorbed on both dolomite and francolite. However, in a phosphate ore, primary amines were adsorbed mainly on the phosphate, indicating that a stronger interaction existed between the amine and francolite than between the amine and dolomite. The use of hydrocarbon oils was beneficial not only in reducing the collector requirements, but also in accelerating the flotation rates.

International Journal of Mineral Processing 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 C16H21N3O3S, Computed Properties of 2016-56-0.

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

Fujita, Toshio published the artcileA new substituent constant, ¦Ð, derived from partition coefficients, HPLC of Formula: 1798-04-5, the publication is Journal of the American Chemical Society (1964), 86(23), 5175-80, database is CAplus.

The partition coefficients between 1-octanol and water were determined for 203 mono- and disubstituted benzenes. From these values a substituent constant, ¦Ð, was calculated for 67 functional groups. The constant ¦Ð is defined as: ¦Ð = log Px – log P_H, where Px is the partition coefficient of a derivative and P_H is that of the parent compound ¦Ð was derived for many of the functions from 8 different systems: benzene, PhNO₂, PhNH₂, PhOH, benzyl alc., BzOH, phenylacetic acid, and phenoxyacetic acid. Although ¦Ð varies continuously for a given function depending on its electronic environment, the range over which it varies is not great. In certain of the systems, ¦Ð values are related by a simple linear expression.

Journal of the American Chemical Society 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

Niwa, Atsushi published the artcileDevelopment of N,O-disubstituted hydroxylamines and N,N-disubstituted amines as insect juvenile hormone mimetics and the role of the nitrogenous function for activity, Computed Properties of 6084-58-8, the publication is Journal of Agricultural and Food Chemistry (1990), 38(2), 514-20, database is CAplus.

Insect juvenile hormone (JH) active N,O-disubstituted hydroxylamines were developed to examine the role of the nitrogenous function for high activity. They are O-alkyl-N-[(4-phenoxyphenoxy) and (4-benzylphenoxy)alkyl]hydroxylamines and reversely substituted N-alkyl-O-[(4-phenoxyphenoxy)alkyl]hydroxylamines. The activity against Culex?pipiens of the most potent member of each class was as high as that of the compounds known so far as the most active of JH mimics. When the overall length of the mols. is kept at the optimum, about 21 ?, suggested in earlier works, the compounds having a hydroxylamino N atom, rather than the O atom, at the ¦Ä-position from the central phenoxy O atom or at the 4-position (about 4.6 ?) from the alkyl end showed about 10 times higher activity than those having the N atom at position 1. The corresponding amine compounds showed this more clearly, but their activity was considerably lower than that of the hydroxylamines. The lower potency of the amines with pK_a ¡Ö10 was attributed to their quaternization at physiol. pH, preventing going to or binding with the action site.

Journal of Agricultural and Food Chemistry 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 C4H12ClNO, Computed Properties of 6084-58-8.

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

Nakayama, Akira published the artcileDevelopment of insect juvenile hormone active oxime O-ethers and carbamates, Synthetic Route of 6084-58-8, the publication is Journal of Agricultural and Food Chemistry (1985), 33(6), 1034-41, database is CAplus.

Undecen-2-one oxime O-ethers and undecen-2-yl carbamates were prepared and their activities tested against Culex?pipiens (common mosquito), Chilo?suppressalis (rice stem borer), and Musca?domestica (housefly). Activities were comparable to that of naturally occurring juvenile?hormone?I??[13804-51-8]. To produce higher activities, the structures of the oxime O-ethers and the reportedly highly active 2-(4-phenoxyphenoxy)ethyl carbamates were hybridized to produce (4-phenoxyphenoxy)- and (4-benzylphenoxy)acetaldehyde oxime O-ethers and related compounds The activity of some of these substances against C. pipiens were comparable to the 90-100% inhibition of metamorphosis by methoprene??[40596-69-8], the most highly active of the juvenile hormone compounds

Journal of Agricultural and Food Chemistry 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 C4H12ClNO, Synthetic Route of 6084-58-8.

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

Masuya, Takahiro published the artcileDiscovery of novel oestrogen receptor ¦Á agonists and antagonists by screening a revisited privileged structure moiety for nuclear receptors, Product Details of C13H10F2, the publication is Scientific Reports (2019), 9(1), 1-11, database is CAplus and MEDLINE.

Bisphenol A (BPA) is used as an industrial raw material for polycarbonate plastics and epoxy resins; however, various concerns have been reported regarding its status as an endocrine-disrupting chem. BPA interacts not only with estrogen receptors (ERs) but constitutive androstane receptor, pregnane X receptor, and estrogen-related receptor ¦Ã (ERR¦Ã); therefore, the bisphenol structure represents a privileged structure for the nuclear-receptor superfamily. Here, we screen 127 BPA-related compounds by competitive-binding assay using [3H]oestradiol and find that 20 compounds bind to ERa with high affinity. We confirm most of these as ERa agonists; however, four compounds, including bisphenol M and bisphenol P act as novel antagonists. These structures harbor three benzene rings in tandem with terminal hydroxy groups at para-positions, with this tandem tri-ring bisphenol structure representing a novel privileged structure for an ERa antagonist. Addnl., we perform an ab initio calculation and develop a new clipping method for halogen bonding or non-covalent interaction using DV-Xa evaluation for biomols.

Scientific Reports published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C13H10F2, Product Details of C13H10F2.

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

Jansone-Popova, Santa published the artcileBis-lactam-1,10-phenanthroline (BLPhen), a New Type of Preorganized Mixed N,O-Donor Ligand That Separates Am(III) over Eu(III) with Exceptionally High Efficiency, COA of Formula: C6H12F3NO5S, the publication is Inorganic Chemistry (2017), 56(10), 5911-5917, database is CAplus and MEDLINE.

We report a new family of preorganized bis-lactam-1,10-phenanthroline (BLPhen) complexants that possess both hard and soft donor atoms within a convergent cavity and show unprecedented extraction strength for the trivalent f-block metal ions. BLPhen ligands with saturated and unsaturated ¦Ä-lactam rings have notable differences in their affinity and selectivity for Am(III) over Eu(III), with the latter being the most selective mixed N,O-donor extractant of Am(III) reported to date. Saturated BLPhen was crystallized with five Ln(III) nitrates to form charge-neutral 1:1 complexes in the solid state. DFT calculations further elaborate on the variety of effects that dictate the performance of these preorganized compounds

Inorganic Chemistry published new progress about 1293990-73-4. 1293990-73-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is O-Pivaloylhydroxylamine trifluoromethanesulfonate, and the molecular formula is C6H12F3NO5S, COA of Formula: C6H12F3NO5S.

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

Ben-Abu, Yuval published the artcileMetabolome dynamics during wheat domestication, COA of Formula: C5H11NO2S, the publication is Scientific Reports (2022), 12(1), 8532, database is CAplus and MEDLINE.

One of the most important crops worldwide is wheat. Wheat domestication took place about 10,000 years ago. Not only that its wild progenitors have been discovered and phenotypically characterized, but their genomes were also sequenced and compared to modern wheat. While comparative genomics is essential to track genes that contribute to improvement in crop yield, comparative analyses of functional biol. end-products, such as metabolites, are still lacking. With the advent of rigorous mass-spectrometry technologies, it is now possible to address that problem on a big-data scale. In attempt to reveal classes of metabolites, which are associated with wheat domestication, we analyzed the metabolomes of wheat kernel samples from various wheat lines. These wheat lines represented subspecies of tetraploid wheat along primary and secondary domestications, including wild emmer, domesticated emmer, landraces durum, and modern durum. We detected that the groups of plant metabolites such as plant-defense metabolites, antioxidants and plant hormones underwent significant changes during wheat domestication. Our data suggest that these metabolites may have contributed to the improvement in the agricultural fitness of wheat. Closer evaluation of specific metabolic pathways may result in the future in genetically-engineered high-yield crops.

Scientific Reports 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, COA of Formula: C5H11NO2S.

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

Nakamura, Shuichi published the artcileEnantioselective Reaction of ¦Á-Lithiated Dithioacetals Using Chiral Bis(oxazoline)s: New Chiral Formyl Anion Equivalents, Recommanded Product: 2,4,6-Triisopropylbenzenethiol, the publication is Journal of Organic Chemistry (2004), 69(5), 1581-1589, database is CAplus and MEDLINE.

The enantioselective reaction of various ¦Á-lithiated dithioacetals with aldehydes or a ketone in the presence of bis(oxazoline)s was examined Among them, unsym. dithioacetals were found to be the best choice for attaining high enantioselectivity. The reaction of lithiated tert-butylthio(2-pyridylthio)methane with aldehydes proceeded with good diastereoselectivity as well as with good enantioselectivity. The enantioselective reaction was shown to proceed through dynamic thermodn. resolution Mercury(II) chloride effected hydrolysis of the dithioacetal moiety of the products to 2-hydroxyaldehydes, which were directly reduced to give the optically active 1,2-diols.

Journal of Organic Chemistry 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