Month: October 2022

Li, Yingze; Krause, Jeanette A.; Guan, Hairong published the artcile< Silane Activation with Cobalt on the POCOP Pincer Ligand Platform>, HPLC of Formula: 52160-51-7, the main research area is aldehyde hydrosilylation cobalt pincer complex catalyst silane siloxane; bisphosphinoxyphenyl cobalt pincer complex preparation crystal structure hydrosilylation catalyst; mol structure phosphinoxyphenyl cobalt pincer complex.

Co POCOP pincer complexes {κP,κC,κP-2,6-(iPr2PO)2C6H3}Co(PMe3)2 (1) and {κP,κC,κP-2,6-(iPr2PO)2-4-NMe2-C6H2}Co(PMe3)2 (2) were synthesized via C-H bond activation of the pincer ligands with HCo(PMe3)4. Silanes such as PhSiH3, Ph2SiH2, and (EtO)3SiH can undergo Si-H oxidative addition with these Co(I) complexes, though reversibly. One of the silane activation products, namely, {κP,κC,κP-2,6-(iPr2PO)2C6H3}Co(H)(SiH2Ph)(PMe3) (3), was isolated and shown to eliminate PhSiH3 upon evaporation to form {κP,κC,κP-2,6-(iPr2PO)2C6H3}Co(PMe3) (4). Under heating, redistribution of PhSiH3 in 3 can take place, resulting in {κP,κC,κP-2,6-(iPr2PO)2C6H3}Co(H)(SiH3)(PMe3) (5) and Ph2SiH2. Complexes 1-3 were established as catalysts for the hydrosilylation of aldehydes bearing various functional groups. According to the mechanistic studies, the silyl hydride species exists in the catalytic cycle, whereas the bis(trimethylphosphine) species sits outside the catalytic cycle. Dissociation of PMe3 is required prior to aldehyde insertion into the silyl hydride species, which is the turnover-limiting step of the catalytic cycle. Consequently, 3 outperforms 1 in catalyzing the hydrosilylation reaction due to the presence of only one PMe3 ligand. The structures of 1-4 were studied by x-ray crystallog.

Organometallics published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 52160-51-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H9NO, HPLC of Formula: 52160-51-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Fleychuk, Roman; Vuytsyk, Lidiya; Kohut, Ananiy; Hevus, Orest published the artcile< Synthesis of epoxyperoxides and peroxide derivatives of α-D-galactopyranose based thereon>, Formula: C12H20O6, the main research area is galactopyranose peroxide preparation thermal stability.

New epoxide-containing peroxides were synthesized via the interaction between epichlorohydrin and ditertiary ω-hydroxyalkyl peroxides. The effect of reaction conditions on both the yield and composition of the reaction products was established. Through the reactions of either the synthesized epoxide-containing peroxides with 1,2;3,4-di-O-isopropylidene-α-D-galactopyranose or 6-O-glycidyl-1,2;3,4-di-O-isopropylidene-α-D-galactopyranose with the ω-hydroxyalkyl peroxides, new peroxide derivatives with ditertiary and primary-tertiary peroxide groups were synthesized successfully. The decomposition of the developed substances was studied by complex thermal anal. and the kinetic parameters of the thermolysis was determined

Chemistry & Chemical Technology published new progress about Activation energy. 4064-06-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C12H20O6, Formula: C12H20O6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Munshi, Sandip; Sinha, Arup; Yiga, Solomon; Banerjee, Sridhar; Singh, Reena; Hossain, Kamal Md.; Haukka, Matti; Valiati, Andrei Felipe; Huelsmann, Ricardo Dagnoni; Martendal, Edmar; Peralta, Rosely; Xavier, Fernando; Wendt, Ola F.; Paine, Tapan K.; Nordlander, Ebbe published the artcile< Hydrogen-atom and oxygen-atom transfer reactivities of iron(IV)-oxo complexes of quinoline-substituted pentadentate ligands>, Product Details of C19H16O, the main research area is iron quinolinylpyridylmethylamine complex preparation; crystal structure iron quinolinylpyridylmethylamine complex.

A series of iron(II) complexes with the general formula [FeII(L2-Qn)(L)]n+ (n = 1, L = F-, Cl-; n = 2, L = NCMe, H2O) were isolated and characterized. The X-ray crystallog. data reveals that metal-ligand bond distances vary with varying ligand field strengths of the sixth ligand. While the complexes with fluoride, chloride and water as axial ligand are high spin, the acetonitrile-coordinated complex is in a mixed spin state. The steric bulk of the quinoline moieties forces the axial ligands to deviate from the Fe-N-axial axis. A higher deviation/tilt is noted for the high spin complexes, while the acetonitrile coordinated complex displays least deviation. This deviation from linearity is slightly less in the analogous low-spin iron(II) complex [FeII(L1-Qn)(NCMe)]2+ of the related asym. ligand L1-Qn due to the presence of only one sterically demanding quinoline moiety. The two iron(II)-acetonitrile complexes [FeII(L2-Qn)(NCMe)]2+ and [FeII(L1-Qn)(NCMe)]2+ generate the corresponding iron(IV)-oxo species with higher thermal stability of the species supported by the L1-Qn ligand. The crystallog. and spectroscopic data for [FeIV(O)(L1-Qn)](ClO4)2 bear resemblance to other crystallog. characterized S = 1 iron(IV)-oxo complexes. The hydrogen atom transfer (HAT) and oxygen atom transfer (OAT) reactivities of both the iron(IV)-oxo complexes were investigated, and a Box-Behnken multivariate optimization of the parameters for catalytic oxidation of cyclohexane by [FeII(L2-Qn)(NCMe)]2+ using hydrogen peroxide as the terminal oxidant is presented. An increase in the average Fe-N bond length in [FeII(L1-Qn)(NCMe)]2+ is also manifested in higher HAT and OAT rates relative to the other reported complexes of ligands based on the N4Py framework. The results reported here confirm that the steric influence of the ligand environment is of critical importance for the reactivity of iron(IV)-oxo complexes, but addnl. electronic factors must influence the reactivity of iron-oxo complexes of N4Py derivatives

Dalton Transactions published new progress about Crystal structure. 76-84-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C19H16O, Product Details of C19H16O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Benessere, Vincenzo; Cucciolito, Maria E.; De Santis, Augusta; Di Serio, Martino; Esposito, Roberto; Melchiorre, Massimo; Nugnes, Fiorella; Paduano, Luigi; Ruffo, Francesco published the artcile< A Sustainable Process for the Production of Varnishes Based on Pelargonic Acid Esters>, Electric Literature of 104-76-7, the main research area is varnish pelargonic acid ester rosin coating.

This work demonstrates the possibility of using pelargonic acid (PA) esters as solvents for vegetable-based varnishes. First, PA was efficiently produced through a chemocatalytic cleavage of oleic acid, practicing an optimized scale-up of previously developed conditions. PA was then esterified with several alcs. ROH (R = Me, i-Pr, n-Bu, n-Hex, 2-ethylhexyl, and sec-octyl) and the products were formulated with a com. rosin (Phenolic Modified Rosin Esters). Dynamic light scattering (DLS) measures and determination of rheol. parameters of the corresponding varnishes disclosed their suitability for applications in offset, coldset, heatset printing inks, and coatings. Furthermore, inks obtained were used to efficiently produce preliminary industrial offset prints.

Journal of the American Oil Chemists’ Society published new progress about Inks. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Electric Literature of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Gan, Longzhan; Li, Xiaoguang; Zhang, Heming; Zhang, Ruoshi; Wang, Hongbin; Xu, Zhe; Peng, Biyu; Tian, Yongqiang published the artcile< Preparation, characterization and functional properties of a novel exopolysaccharide produced by the halophilic strain Halomonas saliphila LCB169T>, Electric Literature of 3458-28-4, the main research area is Halomonas exopolysaccharide mannose glucose food fermentation; Exopolysaccharide; Functional properties; Halomonas saliphila; Halophiles; Structure.

A novel exopolysaccharide, designated hsEPS, was successfully prepared from the high-salt-fermented broth of a novel species Halomonas saliphila LCB169T by ethanol precipitation, anion-exchange and gel-filtration chromatog., and its structure was well-characterized by means of chem. and spectral analyses. Results showed that hsEPS was primarily composed of mannose and glucose with a relative weight-average mol. weight of 5.133 x 104 g/mol. It was deduced that the major backbone contained (1→2)-linked α-D-Manp and (1→6)-linked α-D-Manp with branches substituted at C-2 by T-α-D-Manp and at C-6 by the fragment of T-α-D-Manp-(1→2)-α-D-Manp-(1→. A sheet-like structure was observed under high magnification. The water solubility index, water holding capacity, oil holding capacity and foaming capacity of hsEPS were 98.0, 19.3, 1386.7 and 82.2%, resp. It also exhibited outstanding emulsifying activity against all tested edible oils. Together, the resulted data indicated that hsEPS might serve as an active ingredient in food, cosmetics and detergents.

International Journal of Biological Macromolecules published new progress about Actinobacteria, halophilic. 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Electric Literature of 3458-28-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yu, Juan; Ji, Haiyu; Yang, Zhizhi; Liu, Anjun published the artcile< Relationship between structural properties and antitumor activity of Astragalus polysaccharides extracted with different temperatures>, Application In Synthesis of 3458-28-4, the main research area is Astragalus polysaccharide structure antitumor temperature; Antitumor activity; Astragalus membranaceus polysaccharides; Structural characterization.

This study investigated the effects of different temperatures on structural characterization and antitumor activity of polysaccharides from Astragalus membranaceus. APS4 and APS90 were extracted at 4°C and 90°C, resp., and purified by Sephadex G-200 column. APS4-90 were obtained from APS4 after treatment at 90°C for 6 h. MTT results showed that APS4 possessed the highest inhibitory effects on MGC-803, A549 and HepG2 cells. HPGPC anal. showed that the average mol. weights of these polysaccharides were approx. 1.5 × 106 Da, while the asym. peak of APS4-90 suggested heat degradation and configuration changes of APS4. GC, NMR and methylation results showed that these three polysaccharides had similar monosaccharide components (mainly contain glucose), and their backbones were composed of (1→2)-α-D-Glcp. However, APS4 showed higher content of (1→2,6)-α-D-Glcp compared to APS4-90 and APS90, which indicated that higher branched degree would be responsible for the stronger in vitro antitumor activity in APS4. These results were also confirmed by sp. rotation and SEM anal. Our study suggested that APS4 had the potential application for cancer treatment.

International Journal of Biological Macromolecules published new progress about Antitumor agents. 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Application In Synthesis of 3458-28-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Mastalir, Matthias; Glatz, Mathias; Pittenauer, Ernst; Allmaier, Guenter; Kirchner, Karl published the artcile< Rhenium-Catalyzed Dehydrogenative Coupling of Alcohols and Amines to Afford Nitrogen-Containing Aromatics and More>, Reference of 403-41-8, the main research area is quinoline pyrimidine quinoxaline pyrrole preparation rhenium catalyzed dehydrogenative coupling; aminomethylated arene preparation rhenium catalyzed acceptorless dehydrogenative coupling.

An efficient synthesis of quinolines, pyrimidines, quinoxalines, pyrroles, and aminomethylated aromatic compounds catalyzed by a well-defined Re(I) PNP pincer complex is described. All reactions proceed with liberation of dihydrogen and elimination of water. Under optimized reaction conditions a wide range of organic functional groups are tolerated. This study demonstrates that rhenium catalysts are performing extremely well in dehydrogenative processes with considerably lower catalyst loadings and shorter reaction times when compared to analogous Mn(I) complexes.

Organic Letters published new progress about Aminomethylation. 403-41-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H9FO, Reference of 403-41-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

McKay, Gordon published the artcile< Mass transport processes for the adsorption of dyes onto chitin>, HPLC of Formula: 6054-98-4, the main research area is dye adsorption chitin.

The adsorption of 4 dyestuffs onto chitin was studied. A model was developed to explain the mass transport of dyestuffs onto chitin. The 2-resistance mass transfer model is based on external film mass transfer and pore diffusion. Two solutions are presented: the first is a rapid anal. model which may be applied to adsorption systems in which the operating lines and tie lines terminate on the monolayer of the isotherm, assumed pseudo-irreversible; the second is a model which can be applied for any operating conditions but necessitates differentiation of the exptl. concentration decay curve.

Chemical Engineering and Processing published new progress about Adsorption. 6054-98-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C14H8N2Na2O6, HPLC of Formula: 6054-98-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Maruyama, Kazuya; Kanazawa, Arihiro; Aoshima, Sadahito published the artcile< Alternating Cationic Copolymerization of Vinyl Ethers and Aryl-Substituted Cyclic Acetals: Structural Investigation of Effects of Cyclic Acetals on Copolymerizability>, Name: But-3-en-1-ol, the main research area is alternating cationic copolymerization vinyl ether aryl substituted cyclic acetal.

The effects of the structural difference of cyclic acetals were investigated in the cationic copolymerization with vinyl monomers via the concurrent vinyl-addition and ring-opening mechanisms. A series of alkyl- and aryl-substituted cyclic acetals were successfully copolymerized with 2-chloroethyl vinyl ether (CEVE) under appropriate conditions. In particular, copolymerization of an aryl-substituted 2-(4-methoxyphenyl)-1,3-dioxolane (PMPDOL) with CEVE involved exclusive crossover reactions between PMPDOL and CEVE, resulting in alternating copolymers. Copolymerization of PMPDOL and other vinyl ethers and styrene derivatives also proceeded via the frequent crossover reactions, while the copolymerization of 2-methyl-1,3-dioxolane, a methyl-substituted counterpart of PMPDOL, with vinyl monomers except for CEVE proceeded negligibly. The difference in the substituents of cyclic acetals significantly affected the electronic and steric environments around the carbocation generated in the propagation reaction, which is related to the frequency of the crossover reaction. Acid hydrolysis of alternating copolymers resulted in complete degradation and selective generation of a single compound due to the periodic incorporation of acetal structures in the main chains, which supported the well-defined structure of copolymers. The monomer reactivity ratios were also consistent with the copolymerizability difference between the aryl- and alkyl-substituted cyclic acetals. The structure-polymerizability relationship of cyclic acetals in the copolymerization was discussed based on the reaction mechanism during the propagating reaction.

Macromolecules (Washington, DC, United States) published new progress about Acetals, cyclic Role: PEP (Physical, Engineering or Chemical Process), RCT (Reactant), PROC (Process), RACT (Reactant or Reagent). 627-27-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C4H8O, Name: But-3-en-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hu, Zhifei; Tang, Yu; Yu, Biao published the artcile< Glycosylation with 3,5-Dimethyl-4-(2'-phenylethynylphenyl)phenyl (EPP) Glycosides via a Dearomative Activation Mechanism>, SDS of cas: 4064-06-6, the main research area is glycosylation methylphenylethynylphenylphenyl steroid glycoside mechanism disaccharide.

A highly effective and versatile glycosylation method is developed, which uses 3,5-dimethyl-4-(2′-phenylethynylphenyl)phenyl (EPP) glycosides as donors and NIS/TMSOTf as promoter and proceeds via an unprecedented dearomative activation mechanism.

Journal of the American Chemical Society published new progress about Disaccharides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 4064-06-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C12H20O6, SDS of cas: 4064-06-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts