Catalysis-chemistry

Lu, Kui published the artcileDevelopment of a Concise and Diversity-Oriented Approach for the Synthesis of Plecomacrolides via the Diene-Ene RCM, Recommanded Product: Allyldiphenylphosphine oxide, the publication is Organic Letters (2006), 8(6), 1193-1196, database is CAplus and MEDLINE.

A concise synthesis of the core structures of plecomacrolide with ring sizes varying from 16 to 19 atoms was achieved for the first time by the diene-ene ring-closing olefin metathesis reaction. This approach should allow access to the structurally diverse analogs of plecomacrolide.

Organic Letters 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, Recommanded Product: Allyldiphenylphosphine oxide.

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

Chen, Xuefei published the artcileEffects of floor- and net-rearing systems on intestinal growth and microbial diversity in the ceca of ducks, HPLC of Formula: 63-68-3, the publication is BMC Microbiology (2022), 22(1), 76, database is CAplus and MEDLINE.

Rearing systems can affect livestock production directly, but whether they have effects on intestinal growth states and ceca microorganisms in ducks is largely unclear. The current study used Nonghua ducks to estimate the effects of rearing systems on the intestines by evaluating differences in intestinal growth indexes and cecal microorganisms between ducks in the floor-rearing system (FRS) and net-rearing system (NRS). The values of relative weight (RW), relative length (RL) and RW/RL of the duodenum, jejunum, ileum and ceca in the FRS were significantly higher than those in the NRS during weeks 4, 8 and 13 (p < 0.05). A total of 157 genera were identified from ducks under the two systems, and the dominant microorganisms in both treatments were Firmicutes, Bacteroidetes, Actinobacteria and Proteobacteria at the phylum level. The distribution of microorganisms in the ceca of the two treatments showed significant separation during the three time periods, and the value of the Simpson index in the FRS was significantly higher than that in the NRS at 13 wk (p < 0.05). Five differential microorganisms and 25 differential metabolic pathways were found in the ceca at week 4, seven differential microorganisms and 25 differential metabolic pathways were found in the ceca at week 8, and four differential microorganisms and two differential metabolic pathways were found in the ceca at week 13. The rearing system influences duck intestinal development and microorganisms. The FRS group had higher intestinal RL, RW and RW/RL and obviously separated ceca microorganisms compared to those of the NRS group. The differential metabolic pathways of cecal microorganisms decreased with increasing age, and the abundance of translation pathways was higher in the NRS group at week 13, while cofactor and vitamin metabolism were more abundant in the FRS group.

BMC Microbiology 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, HPLC of Formula: 63-68-3.

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

Li, Jian-Ye published the artcileSynthesis of diaryl sulfides through C-H bond functionalization of arylamides with cobalt salt and elemental sulfur, Category: catalysis-chemistry, the publication is Tetrahedron Letters (2019), 60(13), 895-899, database is CAplus.

A cobalt(II)-mediated, highly chemoselective thioarylation reaction of arylamides with elemental sulfur was reported. This reaction led to the formation of various sym. diaryl sulfides in yields of up to 65% under mild reaction conditions. A cobalt-sulfur radical process was proposed based on preliminary results and mechanistic studies.

Tetrahedron 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, Category: catalysis-chemistry.

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

Xie, Dadi published the artcileComprehensive evaluation of caloric restriction-induced changes in the metabolome profile of mice, Synthetic Route of 6217-54-5, the publication is Nutrition & Metabolism (2022), 19(1), 41, database is CAplus and MEDLINE.

Caloric restriction (CR) is known to extend lifespan and exert a protective effect on organs, and is thus a low-cost and easily implemented approach to the health maintenance. However, there have been no studies that have systematically evaluated the metabolic changes that occur in the main tissues affected by CR. This study aimed to explore the target tissues metabolomic profile in CR mice. Male C57BL/6J mice were randomly allocated to the CR group (n = 7) and control group (n = 7). A non-targeted gas chromatog.-mass spectrometry approach and multivariate anal. were used to identify metabolites in the main tissues (serum, heart, liver, kidney, cortex, hippocampus, lung, muscle, and white adipose) in model of CR. We identified 10 metabolites in the heart that showed differential abundance between the 2 groups, along with 9 in kidney, 6 in liver, 6 in lung, 6 in white adipose, 4 in hippocampus, 4 in serum, 3 in cortex, and 2 in muscle. The most significantly altered metabolites were amino acids (AAs) (glycine, aspartic acid, L-isoleucine, L-proline, L-aspartic acid, L-serine, L-hydroxyproline, L-alanine, L-valine, L-threonine, L-glutamic acid, and L-phenylalanine) and fatty acids (FAs) (palmitic acid, 1-monopalmitin, glycerol monostearate, docosahexaenoic acid, 16-octadecenoic acid, oleic acid, stearic acid, and hexanoic acid). These metabolites were associated with 7 different functional pathways related to the metabolism of AAs, lipids, and energy. Our results provide insight into the specific metabolic changes that are induced by CR and can serve as a reference for physiol. studies on how CR improves health and extends lifespan.

Nutrition & Metabolism 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 C7H5BClNO2, Synthetic Route of 6217-54-5.

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

Peng, Tao published the artcileMultiple cross-linked networks enhanced ENR-based composite with excellent self-healing properties, Computed Properties of 119-80-2, the publication is Polymers for Advanced Technologies (2021), 32(8), 2856-2865, database is CAplus.

Self-healing property is an excellent feature that can improve the reliability and durability of the materials. In this study, carboxylic multi-walled carbon nanotubes (S-CNTs) and 2,2′-dithiodibenzoic acid (DTSA) were introduced into epoxidized natural rubber (ENR) to prepare a self-healing rubber. S-CNTs and DTSA could react with epoxy groups of ENR to effectively cross-link ENR, in which the cross-linked network consisted of reversible disulfide bonds, ¦Â-hydroxyl ester bonds, and hydrogen bonds. The reconfigurable cross-linked network endowed the ENR/S-CNTs/DTSA composites with great self-healing behavior with efficiency up to 99.7%. The multiple cross-linked networks also enhanced the mech. properties of the composite, whose tensile strength reached more than 400% of the neat ENR. Addnl., optical microscope and SEM disclosed the evolution of the damaged area during the self-healing process, and the crack could be completely repaired after the healing process. This work provides an effective and concise method to prepare self-healing ENR-based elastomer, and it may expand the research scope of self-healing materials.

Polymers for Advanced Technologies 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, Computed Properties of 119-80-2.

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

Xia, Yujia published the artcileNH₄I-promoted oxidative formation of benzothiazoles and thiazoles from arylacetic acids and phenylalanines with elemental sulfur, Name: 4-Nitrophenylacetic acid, the publication is Organic & Biomolecular Chemistry (2021), 19(23), 5108-5113, database is CAplus and MEDLINE.

A NH₄I/K₃PO₄-based catalytic system had been established to enable oxidative formation of thiazole compounds I [R¹ = H, MeO; R² = H, MeO, t-Bu; R³ = H, MeO; R¹R² = HC=CHCH=CH, HC=CHCH=N, HC=CHC(Br)=CH, HC=CHC(4-methoxyphenyl)=CH; R²R³ = OCH₂O; Ar = Ph, 3-pyridyl, 2-naphthyl, etc.], II [Ar = Ph, 4-MeC₆H₄, 2,4-di-ClC₆H₃, etc.] from arylacetic acids and phenylalanines with elemental sulfur. While the three-component reaction of anilines or ¦Â-naphthylamines with arylacetic acids and elemental sulfur afforded benzo[2,1-d]thiazoles I [R¹ = H, MeO; R² = H, MeO, t-Bu; R³ = H, MeO; R²R³ = OCH₂O; Ar = Ph] and naphtho[2,1-d]thiazoles, I [R¹R² = HC=CHCH=CH, HC=CHCH=N, HC=CHC(Br)=CH, HC=CHC(4-methoxyphenyl)=CH; Ar = Ph, 3-pyridyl, 2-naphthyl, etc.] the annulation of phenylalanines with elemental sulfur produces 2-benzyl II [Ar = Ph] and 2-benzoylthiazoles. This work well complements previous three-component annulations of benzothiazoles from other coupling partners.

Organic & Biomolecular Chemistry 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 C10H9ClN2O, Name: 4-Nitrophenylacetic acid.

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

Talite, Maria Jessabel published the artcilePerylene Tetracarboxylic Acid Crosslinked to Silica Matrix that Enables Ultrahigh Solid-State Quantum Yield and Efficient Photon Recycling for Holographic Luminescent Solar Concentrators, Related Products of catalysis-chemistry, the publication is Solar RRL (2022), 6(4), 2100955, database is CAplus.

Perylene derivatives possess large absorptivity and high quantum yields (QYs) and thus are promising luminophores for luminescent solar concentrators (LSCs). Unfortunately, severe aggregation-caused quenching, poor solubility, and large reabsorption significantly reduce their solid-state photoluminescence. To address these issues, perylene tetracarboxylic acid (PTCA) is prepared by hydrolyzing perylene tetracarboxylic dianhydride in sodium hydroxide, which is highly compatible with amino-silane precursors for in situ sol-gel synthesis of the silica matrix. In this case, highly luminescent and transparent PTCA@silica composites are formed, in which PTCA mainly exists in the monomer species due to covalent crosslinking to silica network structures. Therefore, a near-unity solid-state QY of ¡Ö90% is obtained even at elevated loadings and existence of reabsorption due to the preservation of monomer states and efficient photon recycling. To demonstrate their potentials in LSCs, large-area LSCs (10 cmx10 cmx0.5 cm) with laminated configuration are fabricated, yielding a high power conversion efficiency of 1.1%. To mitigate the escape-cone losses, the LSCs can be integrated with holog. grating, reaching an ultrahigh edge-emission efficiency of 90%.

Solar RRL published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C6H13BO3, Related Products of catalysis-chemistry.

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

Cai, Sophia K. published the artcileDevelopment of Abraham model correlations for solute transfer into cyclopentanol from both water and the gas phase based on measured solubility ratios, Application In Synthesis of 118-90-1, the publication is Physics and Chemistry of Liquids (2022), 60(2), 287-296, database is CAplus.

Exptl. mole fraction solubilities are reported for acenaphthene, benzoin, salicylamide, o-acetoacetanisidide, benzoic acid, 4-chlorobenzoic acid, 3,4-dichlorobenzoic acid, 4-methoxybenzoic acid, 3,4-dimethoxybenzoic acid, 2-hydroxybenzoic acid, 2-methylbenzoic acid, 3-methylbenzoic acid and 4-nitrobenzoic acid dissolved in cyclopentanol at 298.15 K. Results of exptl. measurements, combined with published solubility data and activity coefficient data taken from the published literature, were used to derive Abraham model correlations for solute transfer into anhydrous cyclopentanol solvent from both water and from the gas phase. The derived Abraham model correlations back-calculate the observed exptl. data to within 0.11 log units (or less).

Physics and Chemistry of Liquids 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, Application In Synthesis of 118-90-1.

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

DiRico, Kenneth J. published the artcileUltra-High-Throughput Acoustic Droplet Ejection-Open Port Interface-Mass Spectrometry for Parallel Medicinal Chemistry, Formula: C10H10O3, the publication is ACS Medicinal Chemistry Letters (2020), 11(6), 1101-1110, database is CAplus and MEDLINE.

High-throughput experimentation (HTE) has emerged as an important tool in drug discovery, providing a platform for preparing large compound libraries and enabling swift reaction screening over wide-ranging conditions. Recent advances in automated high-d., material-sparing HTE have necessitated the development of rapid analytics with sensitivity and resolution sufficient to identify products and/or assess reaction performance in a timely and data-rich manner. Combination of an ultra-throughput (UT) reader platform with Acoustic Droplet Ejection-Open Port Interface-Mass Spectrometry (ADE-OPI-MS) provides the requisite speed and sensitivity. Herein, the authors report the application of ADE-OPI-MS to HTE in the areas of parallel medicinal chem. and reaction screening.

ACS Medicinal Chemistry Letters published new progress about 2051-95-8. 2051-95-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ketone, name is 3-Benzoylpropionicacid, and the molecular formula is C10H10O3, Formula: C10H10O3.

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

Zhang, Xiao-ping published the artcileAggregation behavior of ultrafine kaolinite in water, Application In Synthesis of 2016-56-0, the publication is Zhongguo Kuangye Daxue Xuebao (2007), 36(4), 514-517, database is CAplus.

The change of pH and the effect of cationic surfactants on aggregation behavior of ultrafine kaolinite in the water were investigated by sedimentation tests and Zeta potential measurements. The exptl. results show that kaolinite particles aggregate when the pH of system is less than 7 and disperse when the pH of system is more than 9. With the addition of cationic surfactants, the value of Zeta potential of kaolinite increase and the aggregation effect is improved. The higher the surfactant concentration is, the more obvious the aggregation effect is. While pH is 7, the sediment yield of kaolinite decreases with the increase of length of alkylamine acetate chains. At the same concentration, the quaternary ammonium compounds produce better aggregation effect than alkylamine acetate.

Zhongguo Kuangye Daxue Xuebao 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 C20H19NO4, Application In Synthesis of 2016-56-0.

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