Month: December 2022

Gaydou, Morgane published the artcileSite-Selective Catalytic Carboxylation of Unsaturated Hydrocarbons with CO₂ and Water, Computed Properties of 1949-41-3, the publication is Journal of the American Chemical Society (2017), 139(35), 12161-12164, database is CAplus and MEDLINE.

A catalytic protocol that reliably predicts and controls the site-selective incorporation of CO₂ to a wide range of unsaturated hydrocarbons utilizing water as formal hydride source is described. This platform unlocks an opportunity to catalytically repurpose three abundant, orthogonal feedstocks under mild conditions.

Journal of the American Chemical Society published new progress about 1949-41-3. 1949-41-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene, name is 2-Methyl-4-phenylbutanoic acid, and the molecular formula is C11H14O2, Computed Properties of 1949-41-3.

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

Nikoorazm, Mohsen published the artcileL-Arginine complex of copper on modified core-shell magnetic nanoparticles as reusable and organic-inorganic hybrid nanocatalyst for the chemoselective oxidation of organosulfur compounds, Recommanded Product: 2,2′-Dithiodibenzoic acid, the publication is Journal of the Iranian Chemical Society (2021), 18(2), 467-478, database is CAplus.

The fabrication and characterization of a stable heterogeneous nanostructure catalyst of copper immobilized on Fe₃O₄@SiO₂@L-Arginine, for the oxidation of sulfides and oxidative coupling of thiols was reported. The prepared nanocatalyst was characterized by different techniques such as FTIR, XRD, SEM, TEM and TGA. These nanoparticles were the effective catalyst for selective oxidation of sulfides and oxidative coupling of thiols using 30% H₂O₂. The suggested method offered several prominent advantages such as mild condition, use of magnetically reusable catalyst, simple workup procedure, good to high yields of products and great selectivity.

Journal of the Iranian Chemical Society 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

Bakherad, Mohammad published the artcileMetal-free green synthesis of aryl amines in magnetized distilled water: experimental aspects and molecular dynamics simulation, Computed Properties of 1821-27-8, the publication is Green Chemistry, database is CAplus.

A simple, green, and transition metal-free approach to the N-arylation of secondary amines with aryl halides in magnetized distilled water (MDW), as a solvent was introduced. This method offered the advantages of short reaction times, low costs, and an additive-free process, and it also enabled new planning strategies for the construction of aryl amine-containing pharmacophores. Also, the reaction rates were followed spectrophotometrically by monitoring the changes in the absorption spectrum of the reaction mixture in ordinary and magnetized distilled water. Furthermore, the reliable mol. dynamics (MD) simulations were used as predictive tools to interpret and describe the interactions between reactants in the ordinary and magnetized distilled water. The RDFs anal. of interactions revealed that morpholine and iodobenzene reactants were surrounded by more solvents in MDW than ordinary distilled water (ODW) 90¡ãC. Consequently, the high reactivity observed for two reactants in MDW at 90¡ãC can be explained by MD simulation, and there comes an established synergy between the theor. calculation and experiment

Green 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, Computed Properties of 1821-27-8.

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

Minus, Matthew B. published the artcile“Benchtop” Biaryl Coupling Using Pd/Cu Cocatalysis: Application to the Synthesis of Conjugated Polymers, Related Products of catalysis-chemistry, the publication is Organic Letters (2021), 23(8), 2873-2877, database is CAplus and MEDLINE.

Typically, Suzuki couplings used in polymerizations are performed at raised temperatures in inert atmospheres. As a result, the synthesis of aromatic materials that utilize this chem. often demands expensive and specialized equipment on an industrial scale. Herein, we describe a bimetallic methodol. that exploits the distinct reactivities of palladium and copper to perform high yielding aryl-aryl dimerizations and polymerizations that can be performed on a benchtop under ambient conditions. These couplings are facile and can be performed by simple mixing in the open vessel. To demonstrate the utility of this method in the context of polymer synthesis: polyfluorene, polycarbazole, polysilafluorene, and poly(6,12-dihydro-dithienoindacenodithiophene) were created at ambient temperature and open to air.

Organic Letters published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Related Products of catalysis-chemistry.

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

Sala-Carvalho, Wilton R. published the artcileMetabolome of Ceratodon purpureus (Hedw.) Brid., a cosmopolitan moss: the influence of seasonality, Recommanded Product: 2-Methylbenzoic acid, the publication is Planta (2022), 255(4), 77, database is CAplus and MEDLINE.

Ceratodon purpureus showed changes in disaccharides, flavonoids, and carotenoids throughout annual seasons. These changes indicate harsher environmental conditions during the dry period, directing metabolic precursors to enhance the antioxidant system. Bryophytes are a group of land plants comprising mosses (Bryophyta), liverworts (Marchantyophyta), and hornworts (Antocerotophyta). This study uses the mol. networking approach to investigate the influence of seasonality (dry and rainy seasons) on the metabolome and redox status of the moss Ceratodon purpureus (Hedw.) Brid., from Campos do Jordao, Brazil. Samples of C. purpureus were submitted to three extraction methods: 80% methanol producing the soluble fraction (intracellular compounds), followed by debris hydrolysis using sodium hydroxide producing the insoluble fraction (cell wall conjugated compounds), both analyzed by HPLC-MS; and extraction using pre-cooled methanol, separated into polar and non-polar fractions, being both analyzed by GC-MS. All fractions were processed using the Global Natural Product Social Mol. Network (GNPS). The redox status was assessed by the anal. of four enzyme activities combined with the anal. of the contents of ascorbate, glutathione, carotenoids, reactive oxygen species (ROS), and malondialdehyde acid (MDA). During the dry period, there was an increase of most biflavonoids, as well as phospholipids, disaccharides, long-chain fatty acids, carotenoids, antioxidant enzymes, ROS, and MDA. Results indicate that C. purpureus is under harsher environmental conditions during the dry period, mainly due to low temperature and less water availability (low rainfall).

Planta 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

Castruita-de Leon, Griselda published the artcilePreparation of polybenzimidazole-based mixed matrix membranes containing modified-COK -12 mesoporous silica and evaluation of the mixed-gas separation performance, Quality Control of 13822-56-5, the publication is Polymers for Advanced Technologies (2022), 33(5), 1412-1426, database is CAplus.

This work reports the preparation and characterization of mixed matrix membranes (MMMs) based on mesoporous ordered COK-12 silica modified with 3-aminopropyltrimethoxysilane as filler, and a series of polybenzimidazoles with different main-chain structure as polymer matrix. Polybenzimidazoles (PBIs) were prepared from 3,3′-diaminobenzidine and several dicarboxylic acids with different chem. structure. The physicochem. studies, as well as thermal, structural, and morphol. properties of MMMs were determined by Fourier transform IR spectroscopy, thermogravimetric anal., X-ray diffraction (XRD), and SEM. In addition, gas permeability properties of MMMs were tested by using a gas mixture of CO₂/CH₄ at different upstream pressures. Results indicated that thermal stability of PBI above 400¡ãC is kept even after the addition of the modified COK-12 silica. The d-spacing of the PBI membranes determined by XRD was slightly increased with the addition of the modified COK-12 silica particles. The permeability tests carried out at operating pressures of 50 and 150 psi showed that the addition of amino-modified COK-12 silica particles improved significantly the CO₂ permeability of MMMs with respect to the pristine PBI. At the same time, the selectivity values were also enhanced, which in some cases were found to be more than double compared to the resp. pristine membrane. The contribution of the modified COK-12 silica on the gas transport properties was more promising in MMMs comprising PBIs with less rigid backbone chem. structure.

Polymers for Advanced Technologies 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 C6H17NO3Si, Quality Control of 13822-56-5.

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

Matos, M. A. R. published the artcileStandard molar enthalpies of combustion of five trans-dimethoxycinnamic acids, COA of Formula: C11H12O4, the publication is Journal of Chemical Thermodynamics (2001), 33(8), 899-904, database is CAplus.

The standard (p^o = 0.1 MPa) molar enthalpies of formation for 2,3-, 2,4-, 2,5-, 3,4- and 3,5- trans-dimethoxycinnamic acids in the gaseous phase were derived from the standard molar enthalpies of combustion in oxygen of the crystalline compounds determined by static bomb combustion calorimetry at T = 298.15 K and from the literature values for the resp. enthalpies of sublimation. (c) 2001 Academic Press.

Journal of Chemical Thermodynamics published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C11H12O4, COA of Formula: C11H12O4.

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

Febles, Martin published the artcileSynthesis and biological evaluation of crown ether acyl derivatives, Safety of 2-(3-(Benzyloxy)phenyl)acetic acid, the publication is Bioorganic & Medicinal Chemistry Letters (2016), 26(22), 5591-5593, database is CAplus and MEDLINE.

A set of crown Et acyl derivatives based on 18-crown-6 moiety was synthesized and evaluated for biol. activity. In vitro antiproliferative profiling demonstrated significant activities against HBL-100, HeLa, SW1573 and WiDr human cell lines. The most active compound exhibited GI₅₀ values in the range of 3.7-5.6 ¦ÌM. Antimicrobial evaluation showed that three polyaromatic compounds were active against Staphylococcus aureus (MIC₉₀ values from 8.3 ¦ÌM to 50 ¦ÌM), whereas a (decyloxy)benzene substitution exhibited moderate activity against Candida albicans (MIC₉₀ values 36 ¦ÌM). According to SAR evaluation, the size of the crown ether and the acyl side chain had a significant effect on the bioactivity. Aromatic moieties close to the acyl group led to improved bioactivity as exemplified by some of the tested compounds These results provide further evidence on the potential of crown Et structure as a scaffold for developing new biol. probes and lead candidates for drug development.

Bioorganic & Medicinal Chemistry Letters published new progress about 1860-58-8. 1860-58-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(3-(Benzyloxy)phenyl)acetic acid, and the molecular formula is C15H14O3, Safety of 2-(3-(Benzyloxy)phenyl)acetic acid.

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

Roversi, Elena published the artcileSubstituent effect on the competition between hetero-Diels-Alder and cheletropic additions of sulfur dioxide to 1-substituted 1,3-butadienes, Safety of Allyldiphenylphosphine oxide, the publication is Helvetica Chimica Acta (2002), 85(3), 733-740, database is CAplus.

The reactivity of sulfur dioxide toward variously substituted butadienes was explored in an effort to define the factors affecting the competition between the hetero-Diels-Alder and cheletropic additions At low temperature (<-70¡ã), 1-alkyl-substituted 1,3-dienes that can adopt s-cis-conformations add to SO₂ in the hetero-Diels-Alder mode in the presence of CF₃COOH as promoter. In the case of (E)-1-ethylidene-2-methylidenecyclohexane, the [4+2] cycloaddition of SO₂ is fast at -90¡ã without acid catalyst. (E)-1-(Acyloxy)-1,3-butadienes also undergo the hetero-Diels-Alder addition with SO₂+CF₃COOH at low temperatures, giving a 1:10 mixture of the corresponding cis- and trans-6-(acyloxy)sultines. Above -50¡ã, the sultines undergo complete cycloreversion to the corresponding dienes and SO₂, which that add in the cheletropic mode at higher temperature to give the corresponding 2-substituted sulfolenes. The hetero-Diels-Alder additions of SO₂ follow the Alder endo rule, giving first the 6-substituted cis-sultines that equilibrate then with the more stable trans-isomers. This statement is based on the assumption that the S=O group in the sultine prefers a pseudo-axial rather than a pseudo-equatorial position, as predicted by quantum calculations The most striking observation is that electron-rich dienes , such as 1-cyclopropyl-1,3-butadiene, 1-phenyl-1,3-butadiene, 1-(4-methoxyphenyl)-1,3-butadiene, 1-(trimethylsilyl)-1,3-butadiene, 1-phenoxy-1,3-butadiene, 1-(4-chlorophenoxy)-1,3-butadiene, 1-(4-methoxyphenoxy)-1,3-butadiene, 1-(4-nitrophenoxy)-1,3-butadiene, 1-(2-naphthalenyloxy)-1,3-butadiene, 1-(methylthio)-1,3-butadiene, 1-(phenylthio)-1,3-butadiene, 1-[(4-chlorophenyl)thio]-1,3-butadiene, 1-[(4-methoxyphenyl)thio]-1,3-butadiene 1-[(4-nitrophenyl)thio]-1,3-butadiene, and 1-(phenyl-seleno)-1-1,3-butadiene, as well as 1-(methoxymethylene)-2-methylenecyclohexane do not equilibrate with the corresponding sultines between -100¡ã and -10¡ã in the presence of large excess of SO₂, with or without acidic promotor. The hetero-Diels-Alder additions of SO₂ to 1-substituted (E)-1,3-butadienes are highly regioselective, giving exclusively the corresponding 6-substituted sultines. The 1-substituted (Z)-1,3-butadienes do not undergo the hetero-Diels-Alder additions with sulfur dioxide.

Helvetica Chimica Acta 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, Safety of Allyldiphenylphosphine oxide.

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

Bhandari, Pallab published the artcileFace-Directed Tetrahedral Organic Cage Anchored Palladium Nanoparticles for Selective Homocoupling Reactions, Synthetic Route of 613-33-2, the publication is European Journal of Inorganic Chemistry (2022), 2022(7), e202100986, database is CAplus.

Numerous metalla-supramol. architectures have been designed using coordination-driven self-assembly, while the number of analogous organic architectures is still very limited. In this regard, mainly di-, tri- and a few tetra-aldehydes have been exploited as precursors in combination with appropriate di-/tri-amines to obtain the desired structures with limited complexities. We report here facile synthesis of two face-directed tetrahedral organic cages (TC-R and TC-S) that were formed by [4+12] imine condensation of a new hexa-aldehyde precursor with two enantiomers of 1,2-diaminocyclohexane sep. (CA-R and CA-S). The covalent imine cages are very large with an intrinsic porous cavity of ?1250 ? and the faces of the cages consist of aromatic aldehyde units whereas each corner is occupied by three semi-flexible diamine moieties. Palladium (PdNPs) nanoparticles (3.5¡À0.3 nm) were synthesized employing the cage TC-R as a solid support via double-solvent approach. Furthermore, the cage hosted PdNPs [Pd(0)@TC-R-A] exhibited efficient catalytic activity for selective homocoupling of aryl- and hetero-aryl halides with high thermal stability and reusability.

European Journal of Inorganic Chemistry published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Synthetic Route of 613-33-2.

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