Month: December 2022

Van Velzen, P. N. T. published the artcileIon structures and relaxation of vibrationally excited ions as studied by photodissociation, Quality Control of 622-86-6, the main research area is photodissociation spectra phenol hexene.

Photodissociation spectra of the m/2 94 ions from PhOH, PhOEt, bicyclo[2.2.2]oct-2-ene-5,7-dione, and 2-phenoxyethyl chloride were given. The spectra of the ions from the bicyclo compound and from 2-phenoxyethyl chloride were essentially different from those of the ions from PhOH and PhOEt. The two different spectra were ascribed to structures I and II, resp. The photodissociation spectra of 1-hexene is strongly pressure dependent suggesting the existence of an ion mixture

Lecture Notes in Chemistry published new progress about photodissociation spectra phenol hexene. 622-86-6 belongs to class ethers-buliding-blocks, name is (2-Chloroethoxy)benzene, and the molecular formula is C8H9ClO, Quality Control of 622-86-6.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Li, Aijun published the artcileImproved synthesis of nefazodone from phenol, Related Products of ethers-buliding-blocks, the main research area is nefazodone improved preparation; triazolone phenoxyethyl derivative nefazodone intermediate preparation.

A route for the synthesis of nefazodone (I) is reported. Nefazodone was obtained with an overall yield of 37.2% from phenol. The key steps involve the improved synthesis of 5-ethyl-4-(2-phenoxyethyl)-1,2,4-triazol-3(2H)-one (II), a key intermediate. The phenol was etherified with 1,2-dichloroethane (75%), followed by iodination-amination with NaI and CH3OH-NH3 (85.7%), acylation with Et chloroformate (95.7%) and cyclization with propionylhydrazine (83.6%).

Transactions of Tianjin University published new progress about nefazodone improved preparation; triazolone phenoxyethyl derivative nefazodone intermediate preparation. 622-86-6 belongs to class ethers-buliding-blocks, name is (2-Chloroethoxy)benzene, and the molecular formula is C8H9ClO, Related Products of ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kolomoiets, O. V. published the artcileSolid polymer electrolyte for improving the safety of the lithium-sulfur battery, Related Products of ethers-buliding-blocks, the main research area is lithium sulfur battery polymer electrolyte safety.

Polymer electrolytes containing: 1) Polymer matrix Polyvinylidene fluoride (PVDF), 2) Ionic liquid / quaternary ammonium salt, 3) Lithium salt,LiN(CF3SO2)2, 4) Plasticizer,tetraglym (G4) have been investigated using: SEM, impedance, cyclic voltammetry and galvanostatic studies in the lithium-sulfur system. The prospects of the polymer electrolyte use for improving the safety of lithium-sulfur batteries are shown. Developed polymer electrolytes are promising for use in Li S batteries in a wide temperature range from minus 200C to plus 1000C, and for long-term storage of Li-S batteries.

ECS Transactions published new progress about lithium sulfur battery polymer electrolyte safety. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Related Products of ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Morgan, David L. published the artcileEnd-quenching of quasiliving polyisobutylene with phenoxy derivatives for direct chain end functionalization, Product Details of C8H9ClO, the main research area is end quenching quasiliving polyisobutylene phenoxy derivative chain end functionalization.

Various functional alkyl phenoxy derivatives were used to end-quench TiCl4-catalyzed quasiliving isobutylene polymerizations initiated from 2-chloro-2,2,4-trimethylpentane or 5-tert-butyl-1,3-di(2-chloro-2-propyl)benzene at -70°C in 40/60 (volume/volume) hexane/methyl chloride. Quant. end-capping was observed from mono-alkylation of the phenoxy derivatives in para position. The quenching reactions were tolerant of phenoxy derivatives bearing a primary halide, allowing for direct functionalization of polyisobutylene with primary chloride and bromide end groups. Electrophilic aromatic substitution on phenoxy alkyls such as anisole, and subsequent in situ cleavage of the alkyl-oxygen bond, provided single-pot synthesis of phenol telechelic polyisobutylene.

Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) published new progress about end quenching quasiliving polyisobutylene phenoxy derivative chain end functionalization. 622-86-6 belongs to class ethers-buliding-blocks, name is (2-Chloroethoxy)benzene, and the molecular formula is C8H9ClO, Product Details of C8H9ClO.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Park, Jae-Min published the artcileEarly Life History of Lefua costata (Cypriniformes : Balitoridae) from Korea., SDS of cas: 121-00-6, the main research area is Early life history; Egg development; Juveniles; Larvae; Lefua costata.

The purpose of this study is to observe the early life history of Korean Lefua costata and use the result as basic taxonomic research data for balitorid fish. The fertilized eggs were light green color with completely circle shape and mean size was 1.21±0.06 mm (n=30). Immediately after hatching, the size of the larvae was 2.81±0.11 mm (n=5) in mean length, with egg yolk. On the 3rd day after hatching, the preflexion larvae had a mean length of 4.64±0.09 mm (n=5), and their mouth was opened to start feeding. On the 8th day after hatching, a mean length of the postflexion larvae was 9.43±0.46 mm (n=5), the distal part of the notochord was bent to 45°, and 16 fin rays were developed on the caudal fin. On the 31st day after hatching, a mean length of juveniles was 22.3±0.85 mm (n=5), and the number of fin rays was the same as that of adult fish with (iv8) dorsal fins and (iii8) anal fins.

Development & reproduction published new progress about Early life history; Egg development; Juveniles; Larvae; Lefua costata. 121-00-6 belongs to class ethers-buliding-blocks, name is 4-Hydroxy-3-tert-butylanisole, and the molecular formula is C11H16O2, SDS of cas: 121-00-6.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Gluska, Hadar published the artcilePostpartum Depression in COVID-19 Days: Longitudinal Study of Risk and Protective Factors, Recommanded Product: 4-Hydroxy-3-tert-butylanisole, the main research area is COVID-19; EPDS; birth; post-partum depression.

COVID-19 impacted the childbirth experience and increased the rates of postpartum depression (PPD). We assessed the longitudinal effects of the pandemic on the rates of PPD and evaluated the PPD causes and symptoms among women who delivered during the first COVID-19 quarantine in Israel. The participants completed online questionnaires 3 (T1) and 6 mo (T2) following delivery. We used the ‘COVID-19 exposure’ questionnaire, while PPD symptoms, situational anxiety, and social support were evaluated with the EPDS, STAI, and MSPSS questionnaires. The mean EPDS scores increased between T1 and T2 (6.31 ± 5.6 vs. 6.92 ± 5.9, mean difference -0.64 ± 4.59 (95% CI (-1.21)-(-0.06)); t (244) = -2.17, p = 0.031), and the STAI scores decreased (45.35 ± 16.4 vs. 41.47 ± 14.0, t(234) = 4.39, p = 0.000). Despite the exposure to an increased number of COVID-19 events (3.63 ± 1.8 vs. (6.34 ± 2.3)), the impact of exposure decreased between T1 and T2 (8.91 ± 4.6 vs. 7.47 ± 4.1), p < 0.001). In the MSPSS, significant differences were noted on the family scale between the T1 (6.10 ± 1.3) and T2 (5.91 ± 1.4) scores; t (216) = 2.68, p = 0.0008. A regression anal. showed three statistically significant variables that correlated with increased EPDS scores: the MSPSS family subscale (F (1212.00) = 4.308, p = 0.039), the STAI scores (F (1212.00) = 31.988, p = 0.000), and the impact of exposure to COVID-19 (F (1212.00) = 5.038, p = 0.026). The rates of PPD increased for women who delivered during the first COVID-19 lockdown. Further research is warranted to help reduce PPD among these women. Journal of Clinical Medicine published new progress about COVID-19; EPDS; birth; post-partum depression. 121-00-6 belongs to class ethers-buliding-blocks, name is 4-Hydroxy-3-tert-butylanisole, and the molecular formula is C11H16O2, Recommanded Product: 4-Hydroxy-3-tert-butylanisole.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Garino, Cedrik published the artcileNew 2-bromomethyl-8-substituted-benzo[c]chromen-6-ones. Synthesis and biological properties, Related Products of ethers-buliding-blocks, the main research area is bromomethyl benzochromenone preparation enzyme inhibitor.

New 2-bromomethyl-8-substituted-benzo[c]chromen-6-ones have been synthesized and their bioactive properties have been evaluated on different enzymic models: serine proteases (trypsin and α-chymotrypsin), HIV aspartyl protease, nitric oxide synthase and a panel of protein kinases. These new derivatives can provide upon chem. or enzymic attack, very reactive quinonimine methide intermediates, which could be utilized for the design of enzyme inhibitors. We found that some of these new derivatives exhibit modest inhibitory activities on the studied enzyme models, but it could be improved after structure optimization.

Bioorganic & Medicinal Chemistry Letters published new progress about bromomethyl benzochromenone preparation enzyme inhibitor. 127972-00-3 belongs to class ethers-buliding-blocks, name is 2-Methoxy-5-methylphenylboronic acid, and the molecular formula is C8H11BO3, Related Products of ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Di Pietro, Sebastiano published the artcileRemarkable effect of [Li(G4)]TFSI solvate ionic liquid (SIL) on the regio- and stereoselective ring opening of α-gluco carbasugar 1,2-epoxides, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is [Li(G3)]TFSI; [Li(G4)]TFSI; carbasugars; solvate ionic liquids (SILs); α-gluco 1,2-epoxide.

Carba analogs of biol. relevant natural carbohydrates are promising structures for the development of future drugs endowed with enhanced hydrolytic stability. An open synthetic challenge in this field is the optimization of new methodologies for the stereo- and regioselective opening of α-gluco carbasugar 1,2-epoxides that allow for the preparation of pseudo mono- and disaccharides of great interest. Therefore, we investigated the effect of Lewis acids and solvate ionic liquids (SILs) on the epoxide ring opening of a model substrate. Of particular interest was the complete stereo- and regioselectivity, albeit limited to simple nucleophiles, toward the desired C(1) isomer that was observed using LiClO4. The results obtained with SILs were also remarkable. In particular, Li[NTf2]/tetraglyme ([Li(G4)]TFSI) was able to function as a Lewis acid and to direct the attack of the nucleophile preferentially at the pseudo anomeric position, even with a more complex and synthetically interesting nucleophile. The regioselectivity observed for LiClO4 and [Li(G4)]TFSI was tentatively ascribed to the formation of a bidentate chelating system, which changed the conformational equilibrium and ultimately permitted a trans-diaxial attack on C(1). To the best of our knowledge, we report here the first case in which SILs were successfully employed in a ring-opening process of epoxides.

Molecules published new progress about [Li(G3)]TFSI; [Li(G4)]TFSI; carbasugars; solvate ionic liquids (SILs); α-gluco 1,2-epoxide. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Application of 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kang, Inhan published the artcileDirect growth of CuO particles on carbon papers for high-performance rechargeable Li-O2 batteries, Related Products of ethers-buliding-blocks, the main research area is lithium oxygen battery carbon paper copper oxide particle growth.

Lithium-oxygen (Li-O2) batteries are considered as a promising high-energy storage system. However, they suffer from overpotential and low energy efficiency. This study showed that CuO growth on carbon using facile synthesis (simple dipping and heating process) reduces overpotential, thus increasing the energy efficiency. We confirmed the structure of CuO on carbon using X-ray diffraction pattern, XPS, field-emission SEM, and field-emission transmission electron microscopy. The cathode of CuO on carbon shows an average overpotential reduction of ~6% charge/discharge during 10 cycles in nonaqueous Li-O2 batteries. The possible reason for the reduced charge overpotential of the cathode of CuO on carbon is attributed to the formed Li2O2 of smaller particle size during discharging compared to pristine carbon.

Journal of Nanoscience and Nanotechnology published new progress about Air. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Related Products of ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Hu, Penghui published the artcileBio-inspired iron-catalyzed oxidation of alkylarenes enables late-stage oxidation of complex methylarenes to arylaldehydes, COA of Formula: C8H11BO3, the main research area is alkylarene polymethylhydrosiloxane promoter iron catalyst selective aerobic oxidation; aryl carbonyl compound preparation.

A bio-inspired iron-catalyzed polymethylhydrosiloxane-promoted aerobic oxidation of methylarenes to arylaldehydes with high yields and selectivities was reported. Notably, this method can tolerate oxidation-labile and reactive boronic acid group, which is normally required to be transformed immediately after its introduction and represents a significant advance in the area of the chem. of organoboronic acids, including the ability to incorporate both aldehyde and ketone functionalities into unprotected arylboronic acids, a class that can be difficult to access by current means. The robustness of this protocol was demonstrated on the late-stage oxidation of complex bioactive mols., including dehydroabietic acid, Gemfibrozil, Tocopherol nicotinate, a complex polyol structure and structurally complex arylboronic acids.

Nature Communications published new progress about Air. 127972-00-3 belongs to class ethers-buliding-blocks, name is 2-Methoxy-5-methylphenylboronic acid, and the molecular formula is C8H11BO3, COA of Formula: C8H11BO3.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem