Catalysis-chemistry

Besancon, Jack published the artcileMetallocenes. XVII. Attempts to classify the diastereogenic reactions of benchrotrenes. Study of their stereoselectivity, Recommanded Product: 2-Methyl-4-phenylbutanoic acid, the publication is Bulletin de la Societe Chimique de France (1971), 1804-14, database is CAplus.

The reduction of benchrotrenes (I) to the corresponding asym. alc. is stereoselective, and the reactions of II with Cr(CO)6 is not stereoselective. Thus, (-)-(1S)-2-hydroxy-1-propionylbenchrotrene [(-)-III] is treated with KBH4 to give (+)-(1S)-2-hydroxy-1-[(1S)-hydroxypropyl]benchrotrene (IV) (major product) and (+)-(1S)-2-hydroxy-1-[(1R)-hydroxypropyl]benchrotrene (V). A mixture of (-)-(1S)-2-methoxy-1-[(1R)-hydroxypropyl]benchrotrene (VI) (major product) and (-)-(1S)-2-methoxy-1-[(1S)-hydroxypropyl]benchrotrene (VII) is obtained from (+)-(1S)-2-methoxy-1-propionylbenchrotrene [(+)-VII]. II (R = Me, R1 = H) is treated with Cr(CO)6 to give an equimolar mixture of IX and X.

Bulletin de la Societe Chimique de France 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, Recommanded Product: 2-Methyl-4-phenylbutanoic acid.

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

Tamoradi, Taiebeh published the artcileGd (III) and Tb (III) immobilized tryptophan functionalized magnetic nanoparticles for eco-friendly oxidation rections, Name: 2,2′-Dithiodibenzoic acid, the publication is Solid State Sciences (2019), 105981, database is CAplus.

In this study, Gd (III) and Td (III) immobilized magnetic nanocatalysts were prepared following a simple procedure using available materials. These nanoparticles were characterized by FT-IR, XRD, TGA, EDX, and ICP-OES studies and utilized in the S-oxidation reactions. It was observed that the rate of oxidation with Tb magnetic nanocatalyst was higher than that of Gd. Significant advantages of this environmental friendly process include short reaction times, high efficiency, and convenient recovery and reusability of the catalyst for several times without any significant loss of activity.

Solid State Sciences 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 C5H7F3O3, Name: 2,2′-Dithiodibenzoic acid.

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

Tamoradi, Taiebeh published the artcileNeodymium immobilized on Fe₃O₄: A new and recoverable catalyst for oxidation reactions and synthesis of 5-substituted 1H-tetrazoles in green condition, Synthetic Route of 119-80-2, the publication is Polyhedron (2019), 305-311, database is CAplus.

Magnetic nanoparticle functionalized with neodymium complex as catalyst and characterized by SEM, XRD, FT-IR, TGA, EDX and ICP techniques. Then, catalytic activity of prepared catalyst was examined in the synthesis of tetrezoles and oxidation reactions in which observed short reaction time and high yield in these reactions.

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 C16H14O6, Synthetic Route of 119-80-2.

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

Zandi-Mehri, Elham published the artcileDesigning of hydroxyl terminated triazine-based dendritic polymer/halloysite nanotube as an efficient nano-adsorbent for the rapid removal of Pb(II) from aqueous media, Computed Properties of 13822-56-5, the publication is Journal of Molecular Liquids (2022), 119407, database is CAplus.

In the present study, the hydroxyl terminated triazine-based dendritic polymer was synthesized and grown on the halloysite nanotubes surface (HNT-G2) to efficiently remove the Pb(II) ions from aqueous solution The nano-adsorbent morphol. and structure were determined through TEM (transmission electron microscope), XRD (X-ray diffraction), FT-IR (Fourier transformation infra-red), TGA (thermogravimetry anal.), BET (Brunauer-Emmet-Teller) isotherm, and EDS (energy dispersive anal. X-ray spectroscopy) methods. The adsorption of Pb(II) resulted a maximum of 75.2 mg/g at 298 K at optimal pH 6 after only 10 min and 2 g/L of HNT-G2. The adsorption kinetic revealed that it followed the pseudo-second-order model while the adsorption isotherms corresponded the Langmuir model. Accordingly, it could be inferred that the Pb(II) was a single-layer adsorption occurring on the adsorbent surface and further, the rate-controlling step was denoted chem. adsorption. Also, the thermodn. outcome indicated that the adsorption progress could happen spontaneously, and was of the exothermic reaction types (¦¤H = -79.99 kJ/mol and ¦¤G = -7.90 kJ/mol). Surprisingly, the adsorption and desorption efficiency after four cycles was high, while the Pb(II) adsorption mechanism affecting the adsorbent was basically via chelation through the O atoms. Hence, it can be concluded that the HNT-G2 was an effective in efficiently elimination of Pb(II) from the aqueous solution, having high applicability significance.

Journal of Molecular Liquids 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 C4H6O3, Computed Properties of 13822-56-5.

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

Luadthong, C. published the artcileSynthesis and characterization of micro/nanoparticles of poly(vinylalcohol-co-vinylcinnamate) derivatives, Synthetic Route of 16909-09-4, the publication is European Polymer Journal (2008), 44(5), 1285-1295, database is CAplus.

Various poly(vinylalc.-co-vinylcinnamate) derivatives including poly(vinylalc.-co-vinylcinnamate), poly(vinylalc.-co-vinyl-4-methoxycinnamate), poly(vinylalc.-co-vinyl-2,4-dimethoxycinnamate) and poly(vinylalc.-co-vinyl-2,4,5-trimethoxycinnamate) were synthesized by grafting poly(vinylalc.) with appropriate cinnamoyl groups. The self-assembly of grafted products into spherical micellar nanoparticles was performed, and particles were analyzed using dynamic light scattering, SEM, and transmission electron microscopy. ¹H NMR analyses of the well-dispersed micellar particle suspensions and polymer solutions indicated that the hydroxyl groups of the polymer were on the outer surface of the spheres, while the cinnamoyl moieties were buried inside the spheres forming crystalline structure. Polymer with a higher degree of cinnamoyl substitution gave smaller particles upon self-assembly. Variations in particle sizes obtained from PV(OH) grafted with cinnamoyl derivatives of different methoxy substitution on the benzene ring were observed Mol. weight of the polymers did not significantly affect nanoparticle size and morphol. In addition, self-assembly of the poly(vinylalc.-co-vinylcinnamate) derivatives into hollow reverse micellar microparticles of uniform size was also demonstrated. ¹H NMR spectrum of the reverse micellar micro-particle suspension indicated that the cinnamoyl moieties were not in a crystalline state.

European Polymer Journal 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, Synthetic Route of 16909-09-4.

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

Khiri, Dorra published the artcileDetailed kinetic study of hydrogen abstraction reactions of triphenylene, benzo[e]pyrene, dibenzo[fg,op]naphtacene, and coronene by H atoms, Recommanded Product: Coronene, the publication is International Journal of Chemical Kinetics (2022), 54(4), 266-276, database is CAplus.

The thermochem. and dynamics of H-abstraction reactions by H atoms have been investigated for large polycyclic aromatic hydrocarbons (PAHs) including triphenylene, benzo[e]pyrene, dibenzo[fg,op]naphtacene, and coronene using high-level ab initio methods, UCCSD(T)-F12. Highly accurate ground-state potential energy surfaces were obtained and used to compute reliable kinetic data. The structures and vibrational frequencies of all species involved in these reactions have been calculated using the CAM-B3LYP/6-311++G(d,p) level of theory. The thermodn. and kinetic properties have been computed at both used levels of theories. For each type of site, the rate constants were calculated in the 500-2500 K temperature range. The results demonstrate that the overall rate constants of H-abstraction reactions from PAHs with H atoms are not sensitive to the PAHs and their structures. An overall rate constant expression for these processes regardless of the size and structure of the PAH considered is proposed: k(T) = 5.53 x 10⁷ x T^2.19exp(58.09(kJ mol^-1)/RT).

International Journal of Chemical Kinetics published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Recommanded Product: Coronene.

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

Santra, Sourav K. published the artcileVisible-Spectrum Solar-Light-Mediated Benzylic C-H Oxygenation Using 9,10-Dibromoanthracene As an Initiator, Related Products of catalysis-chemistry, the publication is Journal of Organic Chemistry (2021), 86(1), 1164-1171, database is CAplus and MEDLINE.

A visible-light-mediated benzylic C-H oxygenation reaction was reported. The reaction is initiated by solar light or the blue LED activation of 9,10-dibromoanthracene in a reaction with oxygen and takes place at ambient temperature and air pressure. Secondary benzylic positions are oxygenated to ketones, while tertiary benzylic carbons are oxygenated to give hydroperoxides. Notably, cumene hydroperoxide is produced in a higher yield and at milder conditions than the currently employed industrial conditions.

Journal of Organic Chemistry 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, Related Products of catalysis-chemistry.

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

Piela, Katarzyna published the artcileElectrical Anharmonicity and Vibronic Couplings Contributions to Optical Nonlinearity of N-Benzyl-2-methyl-4-nitroaniline Crystal Studied by FT-IR, Polarized FT-NIR, Resonance Raman and UV-Vis Spectroscopy, Recommanded Product: N-Benzyl-2-methyl-4-nitroaniline, the publication is Journal of Physical Chemistry A (2012), 116(7), 1730-1745, database is CAplus and MEDLINE.

FTIR and Raman spectra of the orthorhombic and monoclinic N-benzyl-2-methyl-4-nitroaniline (BNA) single crystals, powders, and BNA solutions were measured in the 15-4000 cm^-1 range, and complete assignments of bands to normal vibrations are proposed. The assignments were reinforced by d. functional theory (DFT) calculations Polarized FT-NIR spectra of the orthorhombic (010) BNA plate were measured for the overtones and combinations anal. and for the mech. and elec. anharmonicity estimation Resonance Raman spectra of the orthorhombic BNA polymorph together with the resonance excitation profiles of fundamental and lattice vibrations, compared with the band maxima in the measured UV-visible-NIR spectra of BNA, revealed vibronic couplings with intramol. and intermol. charge transfers. The role of anharmonicity, vibronic couplings and intermol. H bonds and of the N-benzyl substituent are discussed and the origin of 2nd harmonic generation in the orthorhombic BNA crystal is proposed.

Journal of Physical Chemistry A 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, Recommanded Product: N-Benzyl-2-methyl-4-nitroaniline.

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

Nasreddine, M. published the artcileNew and effective route to N-(2-F-alkyl ethyl) ¦Á-amino acids, Application of 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, the publication is Synthetic Communications (1992), 22(11), 1547-54, database is CAplus.

A new and effective procedure is described for the synthesis of the title ¦Á-amino acids F₃C(CF₂)_nCH₂CH₂NHCHRCO₂H (I; n = 5, 7, R = H, Me, Et, Pr, Bu) which involves a solid-liquid phase transfer catalysis method. Thus, substitution of bromoalkanoates BrCHRCO₂Et with amines F₃C(CF₂)_nCH₂CH₂NH₂ in MeCN in the presence of K₂CO₃ and PhCH₂N⁺Et₃ Cl^– gave 76-96% of the corresponding amino esters, which were saponified to give 71-97% I.

Synthetic Communications published new progress about 30670-30-5. 30670-30-5 belongs to catalysis-chemistry, auxiliary class Polyfluoroalkanes, name is 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, and the molecular formula is C10H6F17N, Application of 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine.

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

Roman, L. published the artcileAn effective route to N,N-bis(2,3-epoxypropyl) 2-F-alkylethylamines, Quality Control of 30670-30-5, the publication is Synthetic Communications (1997), 27(18), 3125-3132, database is CAplus.

An effective procedure is described for the synthesis of N,N-Bis(epoxypropyl) 2-F-alkylethylamines I (R_F = C₄F₉, C₆F₁₃, C₈F₁₇) avoiding the formation of 2-F-alkylethylethenes usually occurring in the N-alkylation of 2-F-alkylethyl iodides by amines.

Synthetic Communications published new progress about 30670-30-5. 30670-30-5 belongs to catalysis-chemistry, auxiliary class Polyfluoroalkanes, name is 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, and the molecular formula is C10H6F17N, Quality Control of 30670-30-5.

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