Catalysis-chemistry

Chen, Zhi-Da published the artcileCatalytic Decarboxylative Fluorosulfonylation Enabled by Energy-Transfer-Mediated Photocatalysis, SDS of cas: 1949-41-3, the publication is Organic Letters (2022), 24(13), 2474-2478, database is CAplus and MEDLINE.

Sulfonyl fluorides are useful building blocks in a wide array of fields. Herein, authors report a catalytic decarboxylative fluorosulfonylation approach for converting abundant aliphatic carboxylic acids to the corresponding sulfonyl fluorides. This transformation is enabled by simple preactivation as aldoxime esters and energy-transfer-mediated photocatalysis. This operationally simple method proceeds with high functional-group tolerance under mild and redox-neutral conditions.

Organic Letters 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, SDS of cas: 1949-41-3.

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

Wang, Anwei published the artcileMn(III) active site in hydrotalcite efficiently catalyzes the oxidation of alkylarenes with molecular oxygen, HPLC of Formula: 457-68-1, the publication is Molecular Catalysis (2021), 111276, database is CAplus.

Developing efficient heterogeneous catalytic systems based on easily available materials and mol. oxygen for the selective oxidation of alkylarenes is highly desirable. In the present research, NiMn hydrotalcite (Ni₂Mn-LDH) was found as an efficient catalyst in the oxidation of alkylarenes using mol. oxygen as the sole oxidant without any additive. Impressive catalytic performance, excellent stability and recyclability, broad applicable scope and practical potential for the catalytic system were observed Mn³⁺ species is proposed to be the efficient active site, and Ni²⁺ played an important role in stabilizing the Mn³⁺ species in the hydrotalcite structure. The kinetic study showed that the aerobic oxidation of diphenylmethane is a first-order reaction over Ni₂Mn-LDH with the activation energy (E_a) and pre-exponential factor (A₀) being 85.7 kJ mol^-1 and 1.8 x 10⁹ min^-1, resp. The Gibbs free energy (¦¤G^¡Ù) is -10.4 kJ mol^-1 K^-1 for the oxidation based on Eyring-Polanyi equation, indicating the reaction is exergonic. The mechanism study indicated that the reaction proceeded through both radical and carbocation intermediates. The two species were then trapped by mol. oxygen and H₂O or hydroxyl species, resp., to yield the corresponding products. The present research might provide information for constructing highly efficient and stable active site for the catalytic aerobic oxidation based on available and economic material.

Molecular Catalysis 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 C12H17NO2, HPLC of Formula: 457-68-1.

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

Wang, Siyao published the artcileSite-selective itaconation of complex peptides by photoredox catalysis, Recommanded Product: Fmoc-Pro-OH, the publication is Angewandte Chemie, International Edition (2022), 61(5), e202111388, database is CAplus and MEDLINE.

Site-selective peptide functionalization provides a straightforward and cost-effective access to diversify peptides for biol. studies. Among many existing non-invasive peptide conjugations methodologies, photoredox catalysis has emerged as one of the powerful approaches for site-specific manipulation on native peptides. Herein, we report a highly N-termini-specific method to rapidly access itaconated peptides and their derivatives through a combination of transamination and photoredox conditions. This strategy exploits the facile reactivity of peptidyl-dihydropyridine in the complex peptide settings, complementing existing approaches for bioconjugations with excellent selectivity under mild conditions. Distinct from conventional methods, this method utilizes the highly reactive carbamoyl radical derived from a peptidyl-dihydropyridine. In addition, this itaconated peptide can be further functionalized as a Michael acceptor to access the corresponding peptide-protein conjugate.

Angewandte Chemie, International Edition published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C8H6ClF3, Recommanded Product: Fmoc-Pro-OH.

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

Wu, Pengfei published the artcileDoped organic charge-transfer cocrystal with tunable fluorescence of wide band emission, Category: catalysis-chemistry, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2022), 113727, database is CAplus.

Supramol. crystals with tunable fluorescence emission have been demonstrated for many applications. Guided by quantum chem. calculations, a series of (TCNB)_x(OFN)_1-x(Cor) doped cocrystals were synthesized by charge transfer induced self-assembly with coronene (Cor) as electron donor and octafluoronaphthalene (OFN) or 1,2,4,5-tetracyanobenzene (TCNB) as electron acceptors. Structural similarity between OFN-Cor and TCNB-Cor are necessary for full proportion doping of (TCNB)_x(OFN)_1-x(Cor). Based on exptl. and theor. anal., doped cocrystals can be tuned in photophys. properties (luminescent color, fluorescence lifetime, quantum yield). With the doping ratio increasing, the doped cocrystals emit fluorescent in different colors from blue to yellow and then to orange. Through mol. design to select and synthesize organic fluorescent materials is an efficient strategy to deeply understand their structure-activity relationship, which pave a potential path to develop novel functional supramol. systems.

Journal of Photochemistry and Photobiology, A: Chemistry 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 C7H3Cl2NO2S, Category: catalysis-chemistry.

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

Garreau, Alyssa L. published the artcileA Protocol for the Ortho-Deuteration of Acidic Aromatic Compounds in D₂O Catalyzed by Cationic Rh^III, Related Products of catalysis-chemistry, the publication is Organic Letters (2019), 21(17), 7044-7048, database is CAplus and MEDLINE.

Methods to catalytically introduce deuterium in synthetically useful yields ortho to a carboxylic acid directing group on arenes typically requires D₂ or high catalyst loadings, which makes using these approaches cost prohibitive for large-scale synthesis (equipment and reagent costs resp.). Herein, we present a simplified approach using low catalyst loadings of cationic Rh^III and D₂O as both deuterium source and solvent and show its application to H/D exchange on various carboxylic acid substrates.

Organic Letters published new progress about 1772-76-5. 1772-76-5 belongs to catalysis-chemistry, auxiliary class Benzenes, name is (E)-3-(3-Nitrophenyl)acrylic acid, and the molecular formula is C9H7NO4, Related Products of catalysis-chemistry.

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

Guo, X. D. published the artcileA novel thioxanthone-hydroxyalkylphenone bifunctional photoinitiator: Synthesis, characterization and mechanism of photopolymerization, SDS of cas: 119-80-2, the publication is Progress in Organic Coatings (2021), 106214, database is CAplus.

A novel bifunctional photoinitiator (named as TX-EG-IPDI-2959) with thioxanthone and hydroxyalkylphenone moieties was synthesized by the reaction of isophorone diisocyanate with Irgacure 2959 and 2-(2-hydroxyethoxy) thioxanthone. The mol. structure of TX-EG-IPDI-2959 was characterized by ¹H NMR, high-resolution mass spectroscopy, UV-vis and FT-IR. The photochem. behavior of TX-EG-IPDI-2959 was investigated through the photolysis and polymerization of Bu acrylate by UV-vis and HRMS. Compared with the combination of Irgacure 2959 and 2-(2-hydroxyethoxy) thioxanthone, the C-C bond cleavage of hydroxyalkylphenone to produce free radical fragments was effectively done under the irradiation of visible LED light. The obvious intramol. synergistic effect between the hydroxyalkylphenone and thioxanthone moieties has been confirmed based on HRMS anal. of photobleach and photopolymerization In addition, the photopolymerization kinetic of an UV gel and trimethylolpropane triacrylate initiated by TX-EG-IPDI-2959 were also investigated. The plausible photochem. reaction mechanism of TX-EG-IPDI-2959 was proposed.

Progress in Organic Coatings 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, SDS of cas: 119-80-2.

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

Wang, Peng published the artcileRational design of dual-functional peptide-based chemosensor for sequential detection of Ag⁺ (AgNPs) and S^2- ions by fluorescent and colorimetric changes and its application in live cells, real water samples and test strips, Application of Fmoc-Pro-OH, the publication is Microchemical Journal (2022), 107326, database is CAplus.

A novel bifunctional chemosensor L with excellent fluorescent group FITC labeled at tetrapeptide (CysProGlyHis-NH₂) was designed and developed. L exhibited fluorescent quenching response and unique visual color change for Ag⁺ and AgNPs in aqueous solution The stoichiometry between L and Ag⁺ was confirmed to be 1:1 based on fluorescent titration, Job¡äs plot, ESI-HRMS and theor. calculation studies. In particular, the limit of detection (LOD) of L for the detection of Ag⁺ and AgNPs were calculated as 3.35 nM and 4.57 nM, resp. In addition, the L-Ag complex as a new relay chemosensor could be highly selective detection of S2-via obvious color and fluorescence changes, which could be monitored by the naked eye. The LOD for S^2- was as low as to be 28.17 nM with high sensitivity. Furthermore, L indicated a rapid response (within 50 s), exciting circularity (more than 10 times) and wide pH response range (6 ? 12). Moreover, in view of excellent stability, low cytotoxicity and biocompatibility, we further successfully applied L for Ag⁺, AgNPs and S^2- detection and imaging in living cells, real water samples and test strips.

Microchemical Journal published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C9H21NO3, Application of Fmoc-Pro-OH.

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

Han, Xiang-Lei published the artcileRegioselective Synthesis of 5-Aminooxazoles via Cp*Co(III)-Catalyzed Formal [3 + 2] Cycloaddition of N-(Pivaloyloxy)amides with Ynamides, Product Details of C6H12F3NO5S, the publication is Organic Letters (2017), 19(22), 6108-6111, database is CAplus and MEDLINE.

A simple and efficient protocol for the regioselective synthesis of 5-aminooxazoles is disclosed. The reaction, catalyzed by a cheap Cp*Co(III) catalyst, starts from easily accessible N-(pivaloyloxy)amides and ynamides. Mild reaction conditions, a broad substrate scope, good functional group tolerance, and good to excellent yields were observed

Organic Letters 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, Product Details of C6H12F3NO5S.

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

Sun, Xue-Yi published the artcileReliable folding of hybrid tetrapeptides into short ¦Â-hairpins, Synthetic Route of 71989-31-6, the publication is Chinese Chemical Letters (2022), 33(1), 257-261, database is CAplus.

Five hybrid tetrapeptides, each consisting a central dipeptide segment of ¦Á-amino acid residues flanked by two aromatic ¦Ã-amino acid residues, are found to fold into well-defined ¦Â-hairpin conformations as shown by NMR, computational study, and X-ray structures. The turn loop of this ¦Â-hairpin motif accommodates different two-residue ¦Á-amino acid sequences from the highly flexible Gly-Gly, to the more restricted D-Pro-Gly. The presence of ¦Á-amino acid side chains enhances the stabilities of the ¦Â-hairpins with the exception of D-Pro-Gly-which results in destabilization. Based on this hairpin/turn motif, a variety of different dipeptide sequences of ¦Á-amino acids which rarely occur in ¦Â-turns can be introduced and presented as two-residue loops.

Chinese Chemical Letters published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C3H7NO2, Synthetic Route of 71989-31-6.

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

Wu, Bo published the artcileA dual-targeting peptide facilitates targeting anti-inflammation to attenuate atherosclerosis in ApoE^-/- mice, Quality Control of 71989-31-6, the publication is Chemical Communications (Cambridge, United Kingdom) (2022), 58(62), 8690-8693, database is CAplus and MEDLINE.

We report a peptidic dual-targeting drug delivery platform (integrins targeting and self-assembly instructed by matrix metalloproteinases) towards inflamed endothelial cells, which improved the anti-inflammatory ability of the loaded drug (i.e., puerarin) in vitro and thus improved the antiatherogenic effect of the loaded drug (i.e., puerarin) in vivo.

Chemical Communications (Cambridge, United Kingdom) published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C13H10O2, Quality Control of 71989-31-6.

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