Catalysis-chemistry

Chattopadhyay, Swarup published the artcileSteric Titration of Arylthiolate Coordination Modes at Pseudotetrahedral Nickel(II) Centers, Synthetic Route of 22693-41-0, the publication is Inorganic Chemistry (2010), 49(2), 457-467, database is CAplus and MEDLINE.

Several derivatives of the pseudotetrahedral phenylthiolate complex Tp^Me,MeNi-SPh (1), Tp^Me,Me- = hydrotris(3,5-dimethyl-1-pyrazolyl)borate, were prepared incorporating substituted arylthiolates, including ortho-substituted ligands Tp^Me,MeNi-SR (R = 2,6-Me₂C₆H₃, 2; 2,4,6-Me₃C₆H₂, 3; 2,4,6- ⁱPr₃C₆H₂, 4; and 2,6-Ph₂C₆H₃, 5) and para-substituted complexes (R = C₆H₄-4-OMe, 6; C₆H₄-4-Me, 7; and C₆H₄-4-Cl, 8). The products were characterized by ¹H NMR and UV-visible spectroscopy. Spectra of 6–8 were consistent with retention of a common structure across the para-substituted series with modest perturbation of the spectral features of 1 assisting their assignment. In contrast, spectra of 2–5 were indicative of a significant change in configuration across the ortho-disubstituted series. The structure of 5 was determined by x-ray crystallog. and a distinctive arylthiolate ligation mode was found, in which the N₃S ligand field was significantly distorted toward a sawhorse, compared to a more common trigonal pyramidal shape (e.g., 1). Also, the arylthiolate substituent rotated from a vertical orientation co-directional with the pyrazole rings and disposed between two of them in 1, to a horizontal orientation perpendicular to and over a single pyrazole ring in 5. This reorientation is necessary to accommodate the large ortho substituents of 5. The divergent Ni-S coordination modes result in distinct ¹H NMR and electronic spectra that were rationalized by d. functional theory (DFT) and time-dependent DFT (TD-DFT) calculations These results demonstrate rich coordination chem. for arylthiolates that can be elicited by steric manipulation at the periphery of pseudotetrahedral ligand fields.

Inorganic 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, Synthetic Route of 22693-41-0.

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

Patra, Tuhin published the artcileIron-Mediated Decarboxylative Trifluoromethylation of ¦Á,¦Â-Unsaturated Carboxylic Acids with Trifluoromethanesulfinate, Quality Control of 1772-76-5, the publication is European Journal of Organic Chemistry (2013), 2013(24), 5247-5250, database is CAplus.

A sustainable FeCl₃-mediated method has been developed for the decarboxylative trifluoromethylation of ¦Á,¦Â-unsaturated carboxylic acids by using NaSO₂CF₃ as an economic and stable CF₃ source. The reaction proceeds under mild condition and tolerates various functional groups. Advantageously, this method does not require an inert atm. and proceeds well in air at ambient temperature

European Journal of Organic Chemistry 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, Quality Control of 1772-76-5.

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

Behrsing, Thomas published the artcileHydrated Rare Earth Structural Networks containing the Phenylene-1,2-dioxydiacetate (PDDA) Ligand, Synthetic Route of 5411-14-3, the publication is Zeitschrift fuer Anorganische und Allgemeine Chemie (2013), 639(1), 41-48, database is CAplus.

Reaction of LnCl₃ with Na₂(PDDA) (PDDA = phenylene-1,2-dioxydiacetate) in a 1 to 2 mol ratio in aqueous solution yielded [Ln₂(PDDA)₃(H₂O)₆]¡¤2H₂O, structurally characterized for Ln = Ce (1), Sm (2) (redetn.), Tb (3) and Y (4) in a monoclinic C2/c array, a second related structural form [orthorhombic, Pbcn] being obtained for Tb (5), Ho (6) and Er (7). The ‘domains of existence’ of these two previously described forms are now extended to Ce-Dy, Y, and Eu-Er, resp. Reaction under the same conditions for the heavier Yb³⁺ ion yielded [Yb₂(PDDA)₃(H₂O)₆]_(¡Þ|¡Þ)¡¤4H₂O (8), orthorhombic, Pbca. In the case of Ln = La the bimetallic species [NaLa(PDDA)₂(H₂O)₂]_(¡Þ|¡Þ)¡¤4H₂O (9) was obtained, while reaction of LnCl₃ with Na₂(PDDA) in a 1 to 3 mol ratio led to the isolation of the isotypic (monoclinic, P2₁/c) [NaLn(PDDA)₂(H₂O)₂]_(¡Þ|¡Þ)¡¤4H₂O for Ln = Ce (10) and Sm (12). With the smaller Ln = Yb, the more definitively bimetallic [NaYb(PDDA)₂(H₂O)₂]_(¡Þ|¡Þ)¡¤3H₂O (13) (triclinic, P1?) was obtained, the trihydrate solvation ascribed differing from that recorded (dihydrate) in a cosynchronous report.

Zeitschrift fuer Anorganische und Allgemeine Chemie published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H10O6, Synthetic Route of 5411-14-3.

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

Grollier, Kevin published the artcile(Trifluoromethylselenyl)methylchalcogenyl as Emerging Fluorinated Groups: Synthesis under Photoredox Catalysis and Determination of the Lipophilicity, Synthetic Route of 5411-14-3, the publication is Chemistry – A European Journal (2021), 27(19), 6028-6033, database is CAplus and MEDLINE.

The synthesis of mols. bearing (trifluoromethylselenyl)methylchalcogenyl groups ArXCH₂COOH (Ar = 4-methylphenyl, 2-methoxy-4-(prop-2-en-1-yl)phenyl, naphthalen-1-yl, etc.; X = O, S, Se) via an efficient two-step strategy based on a metal-free photoredox catalyzed decarboxylative trifluoromethylselenolation with good yields up to 88%, which raised to 98% in flow chem. conditions was described. The flow methods allowed also to scale up the reaction. The mechanism of this key reaction was studied. The physicochem. characterization of these emerging groups was performed by determining their Hansch-Leo lipophilicity parameters with high values up to 2.24. This reaction was also extended to perfluoroalkylselenolation with yields up to 95%. Finally, this method was successfully applied to the functionalization of relevant bioactive mols. such as tocopherol I or estrone derivatives II (R¹ = CF₃, C₆F₁₃).

Chemistry – A European Journal published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H10O6, Synthetic Route of 5411-14-3.

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

Chao, Rebecca R. published the artcileThe efficient and selective catalytic oxidation of para-substituted cinnamic acid derivatives by the cytochrome P450 monooxygenase, CYP199A4, Safety of (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, the publication is RSC Advances (2016), 6(60), 55286-55297, database is CAplus.

The oxidation of cinnamic acid derivatives, e.g., 3-(2H-1,3-benzodioxol-5-yl)prop-2-enoic acid, was investigated in order to determine the potential of CYP199A4 to act as a biocatalyst for this important class of biol. mols. The compounds such as 4-methoxy- and 4-methyl-cinnamic acids bound tightly to CYP199A4 and were better substrates for CYP199A4 than cinnamic acid itself. The oxidations of both 4-methoxy- and 4-methyl-cinnamic acids was 100% selective for attack at the para substituent. Certain dimethoxy substituted cinnamic acids were demethylated more efficiently than 4-methoxycinnamic acid and retained the selectivity for the para-methoxy substituent. Only very low product turnover was observed with 3,5-dimethoxycinnamic acid. The compound, 4-isopropylcinnamic acid was hydroxylated and desatd. by CYP199A4 at the iso-Pr group. Cinnamic acids with a para-substituted alkyl- and alkyloxy-cinnamic acid framework were a good fit for the active site of the CYP199A4 enzyme and as a consequence were efficiently and selectively oxidized. Whole-cell oxidations resulted in high yields of product and CYP199A4 could be developed for applications in the biocatalytic oxidation of cinnamic acid derivatives and related phenylpropanoids.

RSC Advances 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, Safety of (E)-3-(2,4-Dimethoxyphenyl)acrylic acid.

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

Howell, Barbara F. published the artcilePigmented coatings cured with visible light, HPLC of Formula: 2909-77-5, the publication is ACS Symposium Series (1997), 219-232, database is CAplus.

Use of photobleaching photoinitiators in an environmentally friendly, visible light curable, pigmented coating which can be applied for touch up purposes to minimally prepared steel surfaces, was studied. Addnl. requirements are that the coating does not yellow during aging and that it can be applied to a cold surface. Photoinitiators containing BAPO [bis(2,6-dimethoxybenzoyl)-2,4,4-trimethylpentyl-phosphine oxide] and DIBF (5,7-diiodo-3-butoxy-6-fluorone) were tested. DIBF can initiate curing by free radical reactions and by cationic means. DIBF is used with an amine and the cationic photoinitiator OPPI (4-octyloxyphenylphenyl-iodonium hexafluoroantimonate) for radical initiation, but for cationic initiation only OPPI and DIBF are needed. Resins used were: Ebecryl 3700 epoxy acrylate, Unicarb, and Heloxy 505 modifier; monomers were: isobornyl acrylate, trimethylol propane triacrylate, tripropylene glycol trimethacrylate, Photomer 4017 [1,6-hexanediol diacrylate], and Epon 828. Addnl. photoinitiators used were: Darocur 1173, Darocur 4265, Irgacure 907, CGI 1700, FX-512, H-Nu 470, and DIDMA [N,N-dimethyl-2,6-diisopropylaniline]. The photosensitizer used was ITX [isopropylthioxanthone] and the pigments include TiONa, TiO₂, Lampblack, manganese ferrite, and copper chromite. A cycloaliphatic epoxy coating formulation, was rapidly cured cationically with OPPI and DIBF and only a small amount (0.1%) of DIBF photoinitiator was required, to achieve through cure. The use of borate photoinitiators with DIBF, OPPI, and DIDMA was also studied.

ACS Symposium Series published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C14H23N, HPLC of Formula: 2909-77-5.

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

Galaco, Ayla Roberta Borges da Silva published the artcileIon-exchange resin as a new tool for characterisation of coordination compounds and MOFs by NMR spectroscopy, Computed Properties of 5411-14-3, the publication is Chemical Communications (Cambridge, United Kingdom) (2019), 55(56), 8106-8109, database is CAplus and MEDLINE.

¹H and ¹³C NMR spectroscopy was used to investigate the organic constituents of metal complexes, MOFs and coordination compounds synthesized under solvothermal and precipitation conditions. The elucidation of the ligands in paramagnetic compounds bearing Cu²⁺ (d⁹), Gd³⁺ (f⁷), Eu³⁺ (f⁶), Fe³⁺ (d⁵), ions after treatment with a cationic exchange resin is possible. The authors prove the efficiency of two post-synthesis linker modifications on diamagnetic IRMOF-3 Zn²⁺ (d¹⁰) with Et isocyanate and benzyl bromide.

Chemical Communications (Cambridge, United Kingdom) published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H10O6, Computed Properties of 5411-14-3.

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

Dalpozzo, Renato published the artcileSynthesis of phosphine oxides and phosphonates by cerium-mediated addition of organolithium compounds to chloro-phosphorus compounds, Recommanded Product: Allyldiphenylphosphine oxide, the publication is European Journal of Organic Chemistry (1999), 2299-2301, database is CAplus.

The addition of organocerium reagents RCeCl₂ (R = Me, Bu, CHMeEt, hexyl, Ph, allyl, CH₂SiMe₃) to R¹₂P(O)Cl (R¹ = Ph, EtO) leads to the corresponding phosphine oxides and phosphonates, R¹₂P(O)R, in good to high (40-85%) yields. The reaction can be extended to Ce enolates from ketones or nitriles except when a benzyl group bound to the carbonyl moiety should be metalated.

European Journal of Organic Chemistry 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

Elorriaga, David published the artcileFast Addition of s-Block Organometallic Reagents to CO₂-Derived Cyclic Carbonates at Room Temperature, Under Air, and in 2-Methyltetrahydrofuran, HPLC of Formula: 613-33-2, the publication is ChemSusChem (2021), 14(9), 2084-2092, database is CAplus and MEDLINE.

Fast addition of highly polar organometallic reagents (RMgX/RLi) to cyclic carbonates (derived from CO₂ as a sustainable C1 synthon) has been studied in 2-methyltetrahydrofuran as a green reaction medium or in the absence of external volatile organic solvents, at room temperature, and in the presence of air/moisture. These reaction conditions are generally forbidden with these highly reactive main-group organometallic compounds The correct stoichiometry and nature of the polar organometallic alkylating or arylating reagent allows straightforward synthesis of highly substituted tertiary alcs., ¦Â-hydroxy esters, or sym. ketones, working always under air and at room temperature Finally, an unprecedented one-pot/two-step hybrid protocol is developed through combination of an Al-catalyzed cycloaddition of CO₂ and propylene oxide with the concomitant fast addition of RLi reagents to the in situ and transiently formed cyclic carbonate, thus allowing indirect conversion of CO₂ into the desired highly substituted tertiary alcs. without need for isolation or purification of any reaction intermediates.

ChemSusChem 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, HPLC of Formula: 613-33-2.

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

Guittard, Frederic published the artcileSynthesis and behavior at the air-water interface of fluorinated nonionic surfactants containing two methylated polyoxyethylene moieties, Related Products of catalysis-chemistry, the publication is Journal of Colloid and Interface Science (1996), 177(1), 101-05, database is CAplus and MEDLINE.

The nonionic surfactants of the type polyoxyethylated, monomethylated, and containing a fluorinated tail were synthesized from 2-(F-alkyl)ethylamines. These compounds have two polyethoxylated tails with a perfectly defined number of oxyethylene motifs. Compared with their bipodal homologs within the F-alkylated series, these new structures were easily obtained from com. raw materials which are the 2-(F-alkyl)ethyliodides. The evaluation of their behavior at the air-water interface has been studied from measurements of surface tension vs. variation of concentration This clearly shows the variation of the critical micelle concentration (c.m.c.) from 1.0.10^-5 to 2.5.10^-3 mol.liter^-1 and of the surface area per surfactant mol. vs. studied structure. The N,N-dipolyethoxylene methoxyether of 2-(F-alkyl)ethylamines so realized exhibit noteworthy properties as nonionic fluorinated surfactants.

Journal of Colloid and Interface Science 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, Related Products of catalysis-chemistry.

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