Tag: M.W=250-300

Fang, Jing; Zhao, Huamei; Liu, Qinglei; Zhang, Wang; Gu, Jiajun; Su, Yishi; Abbas, Waseem; Su, Huilan; You, Zhengwei; Zhang, Di published the artcile< AgBr/diatomite for the efficient visible-light-driven photocatalytic degradation of Rhodamine B>, HPLC of Formula: 112-63-0, the main research area is silver bromide diatomite rhodamine photocatalytic degradation wastewater treatment.

The treatment of organic pollution via photocatalysis has been investigated for a few decades. However, earth-abundant, cheap, stable, and efficient substrates are still to be developed. Here, we prepare an efficient visible-light-driven photocatalyst via the deposition of Ag nanoparticles (< 60 nm) on diatomite and the conversion of Ag to AgBr nanoparticles (< 600 nm). Exptl. results show that 95% of Rhodamine B could be removed within 20 min, and the degradation rate constant (κ) is 0.11 min-1 under 100 mW/cm2 light intensity. For comparison, AgBr/SiO2 (κ = 0.04 min-1) and commerical AgBr nanoparticles (κ = 0.05 min-1) were measured as well. The exptl. results reveal that diatomite acted more than a substrate benefiting the dispersion of AgBr nanoparticles, as well as a cooperator to help harvest visible light and adsorb dye mols., leading to the efficient visible-light-driven photocatalytic performance of AgBr/diatomite. Considering the low cost ($10 per ton) and large-scale availability of diatomite, our study provides the possibility to prepare other types of diatomite-based efficient photocatalytic composites with low-cost but excellent photocatalytic performance. Journal of Nanoparticle Research published new progress about Absorbents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Li, Helong; Song, Guoyong published the artcile< Ru-Catalyzed Hydrogenolysis of Lignin: Base-Dependent Tunability of Monomeric Phenols and Mechanistic Study>, Synthetic Route of 112-63-0, the main research area is ruthenium catalyst hydrogenolysis lignin mechanism monomeric phenol.

Substantial attention has been given to depolymerization of lignin into monomeric phenols in recent years because lignin is a renewable and CO2-natural aromatic resource. Recent results indicated that the base can shift the selectivity from C3-fragmented phenols to C2-fragmented phenols partially in transition metal-catalyzed lignin hydogenolysis, while reaction mechanisms have remained elusive. Using a series of dimeric, trimeric, and polymeric β-O-4 lignin mimics, as well as their deuterated analogs, we now report an in-depth exptl. study on the mechanism of Ru/C-catalyzed hydogenolysis lignin. Exptl. evidence based on substrate probes, reactivity examination of possible intermediates, and isotopic labeling experiments confirmed that the reported pathways, such as enol ether generated via α,β-dehydration reaction or Cα carbonyl compounds generated via dehydrogenation or consecutive Cβ-O and Cγ-OH bonds hydrogenolysis, are irrelevant to current reactions. For C3-fragmented phenols with Ru/C catalyst under neutral condition, we deduced that the monolignol such as coniferyl alc. is formed primarily through a concerted hydrogenolysis process, where Cα-O and Cβ-O bonds are ruptured synchronously. For C2-fragmented phenols generated by the combination of Ru/C and Cs2CO3, the reaction should start from quinone methide specie generated from the dehydration (or demethanolization) reaction between phenolic proton and Cα-OH (or Cα-OMe). The followed deprotonation of Cγ-OH and the coordination of oxygen with Ru results in a Ru specie, which undergoes Cβ-H, Cβ-O, and Cβ-Cγ bonds cleavage to release 4-vinylphenol. In the case of Ru/C-catalyzed hydrogenolysis of an enzymic mild acidolysis lignin (EMAL) derived from birch tree, the effects of some key parameters such as temperature, reaction time, as well as the type and dosage of base were also examined in terms of monomer yields and selectivity. We found the formation of C2-phenols is a base-dependent process, which is in line with the proposed mechanism. Under optimized conditions, a high proportion of C2-phenols (44%) could be obtained with 26.6 weight % total monomers yield.

ACS Catalysis published new progress about Acid hydrolysis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Djerassi, Carl; Scholz, Caesar R. published the artcile< Brominations with pyridine hydrobromide perbromide, C5H5N.HBr.Br2>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is PYRIDINE AND PYRIDINE COMPOUNDS.

Cholestanone (38 mg.) and 31 mg. C5H5N.HBr.Br2 (I) in 1 cc. AcOH at 40-60° give 81% of the 2-Br derivative; Me 3-ketoallo-etiocholanate and I give 75% of the 2-Br derivative; EtOH or a mixture of EtOH and CHCl3 could be used as the solvent. Me 3-keto-12-acetoxycholanate (110 mg.) and 75 mg. I in 5 cc. AcOH, warmed 1 min. to about 40°, give 61% of the 4-Br derivative; coprostanone gives the 4-Br derivative Me 3(α)-acetoxy-12-ketoetiocholanate (195 mg.) and 155 mg. I in 1.2 cc. AcOH, warmed until solution resulted and kept 2.5 hrs. at room temperature, give on saponification and rearrangement 74% 3(α),12-dihydroxy-11-ketoetiocholanic acid. Cholestanone (380 g.) and 640 mg. I give after 10 min. 73% of the 2,4-di-Br derivative 4-(1-Piperidyl)-2-butanone (65 mg.) in 1 cc. AcOH containing 41% HBr and 135 mg. I, warmed about 30 sec., give 55% 1-bromo-4-(1-piperidyl)-2-butanone-HBr, m. 157-8° (decomposition). C5H5N.Br2 proved disappointing as a brominating agent.

Journal of the American Chemical Society published new progress about Bromination. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Maier, M. E. published the artcile< Product class 6: lactones>, SDS of cas: 112-63-0, the main research area is review lactone preparation organic synthesis.

A review of methods to prepare lactones and their applications to organic synthesis.

Science of Synthesis published new progress about Lactones Role: SPN (Synthetic Preparation), PREP (Preparation). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yan, Xue-Long; Chen, Bei-Ling; Yuan, Fang-Yu; Zhu, Qin-Feng; Zhang, Xu; Lin, Yan; Long, Qing-De; Liao, Shang-Gao published the artcile< Six new tigliane diterpenoids with anti-inflammatory activity from Euphorbia kansuensis>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is tigliane diterpenoid isolation antiinflammatory.

Six new tigliane diterpenoids, euphkanoids A – F I [R1 = OH, [(2E,4E,6E)-8-oxoocta-2,4,6-trienoyl]oxy, [(2E,4E,6E,8E)-10-oxodeca-2,4,6,8-tetraenoyl]oxy; R2 = H, acetyl; R3 = H, acetyl, [(9Z,12Z)-octadeca-9,12-dienoyl]], along with 12 known diterpenoids II [R4 = isopropenyl, isopropyl], III [R5 = oxo, hydroxy], IV, V, and VI were isolated from the roots of Euphorbia kansuensis, a traditional Chinese medicinal plant. Their structures were elucidated by spectroscopic anal., ECD calculation and chem. methods. Compounds I [R1 = [(2E,4E,6E)-8-oxoocta-2,4,6-trienoyl]oxy, [(2E,4E,6E,8E)-10-oxodeca-2,4,6,8-tetraenoyl]oxy, 2,4,6,8,10-dodecapentaenoyl; R2 = acetyl; R3 = H] represent the unusual examples of tigliane diterpenoids with a conjugated olefinic aldehyde moiety. I-VI and two hydrolyzed analogs I [R1 = H, OH; R2 = H; R3 = H] were screened for the inhibitory effects on nitric oxide (NO) production induced by lipopolysaccharide (LPS) in RAW264.7 cells. The results showed that I [R1 = [(2E,4E,6E)-8-oxoocta-2,4,6-trienoyl]oxy, [(2E,4E,6E,8E)-10-oxodeca-2,4,6,8-tetraenoyl]oxy, 2,4,6,8,10-dodecapentaenoyl; R2 = acetyl; R3 = H] and VII markedly inhibited NO production with IC50 values in the range of 4.8-11.3μM, which were more active than the pos. control quercetin (IC50 = 12.3μM).

Arabian Journal of Chemistry published new progress about Alcohols Role: PAC (Pharmacological Activity), PUR (Purification or Recovery), THU (Therapeutic Use), BIOL (Biological Study), PREP (Preparation), USES (Uses). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Mel’nikova, L. A.; Kozlova, I. A.; Peterson, O. P.; Zhdanov, V. M. published the artcile< Origin of a factor causing deproteinization of vaccinia virus nucleocapsid>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is .

Chicken fibroblast cultures wese infected with inactivated (2.5-3 hrs. at 56°) vaccinia virus and after 2-2.5 hrs. the cells were washed with saline and treated with antivaccinia serum. Then, after 3-fold centrifugation at 3000 and twice at 2200 rpm., the sediment was homogenized, resuspended, and actinomycin D, 0.05 γ/ml., was added. The reactivation was realized by addition of active vaccinia virus with 20-80 γ/ml. pyrromycin. The title factor is probably an enzyme, evoked not by the virus, but by a cell genome. This factor is formed 2-2.5 hrs. after cell infection and makes possible the reactivation of inactivated virus.

Voprosy Virusologii published new progress about Viruses. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Hermant, Paul; Bosc, Damien; Piveteau, Catherine; Gealageas, Ronan; Lam, BaoVy; Ronco, Cyril; Roignant, Matthieu; Tolojanahary, Hasina; Jean, Ludovic; Renard, Pierre-Yves; Lemdani, Mohamed; Bourotte, Marilyne; Herledan, Adrien; Bedart, Corentin; Biela, Alexandre; Leroux, Florence; Deprez, Benoit; Deprez-Poulain, Rebecca published the artcile< Controlling Plasma Stability of Hydroxamic Acids: A MedChem Toolbox>, Formula: C19H34O2, the main research area is hydroxamic acid plasma stability.

Hydroxamic acids are outstanding zinc chelating groups that can be used to design potent and selective metalloenzyme inhibitors in various therapeutic areas. Some hydroxamic acids display a high plasma clearance resulting in poor in vivo activity, though they may be very potent compounds in vitro. The authors designed a 57-member library of hydroxamic acids to explore the structure-plasma stability relationships in these series and to identify which enzyme(s) and which pharmacophores are critical for plasma stability. Arylesterases and carboxylesterases were identified as the main metabolic enzymes for hydroxamic acids. Finally, the authors suggest structural features to be introduced or removed to improve stability. This work thus provides the first medicinal chem. toolbox (exptl. procedures and structural guidance) to assess and control the plasma stability of hydroxamic acids and realize their full potential as in vivo pharmacol. probes and therapeutic agents. This study is particularly relevant to preclin. development as it allows obtaining compounds equally stable in human and rodent models.

Journal of Medicinal Chemistry published new progress about Blood plasma. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Cutler, C. A.; Burrell, A. K.; Officer, D. L.; Too, C. O.; Wallace, G. G. published the artcile< Effect of electron withdrawing or donating substituents on the photovoltaic performance of polythiophenes>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is thiophene nitrophenyl cyanophenyl dimethylaminophenyl substituent preparation galvanostatic polymerization; bithiophene styrylthiophene copolymer preparation redox state conductivity; photovoltaic response bithiophene styrylthiophene copolymer substituent effect.

Bithiophene copolymers with p-(E)-3-styrylthiophenes were prepared by electrochem. polymerization and characterized by cyclic voltammetry, UV-VIS spectrophotometry, elemental anal., and four point probe conductivity measurements. The monomers 1-(4”-Nitrophenyl)-2-(3′-thienyl)ethene, 1-(4”-cyanophenyl)-2-(3′-thienyl)ethene, and 1-(4”-Dimethylaminophenyl)-2-(3′-thienyl)ethene were first prepared, then the copolymers were prepared under galvanostatic conditions. The ratio of bithiophene to substituted thiophene units was as high as 8:1. The effects of electron withdrawing groups (-NO2 and -CN) and the electron donating group -NMe2 on. The homopolymer and copolymers had low conductivity, yet the UV-VIS spectra still showed the expected differences in absorbance between fully oxidized (conducting) and fully reduced (semiconducting) states. Spectral differences were also observed when the polythiophenes were partially oxidized. Fully oxidized polymers showed negligible photovoltaic response. Partially oxidized copolymers with -CN and -NMe2 substituted thiophene groups showed photovoltaic response at 500 V. The polymers were evaluated in terms of photovoltaic output using a photoelectrochem. test cell structure with liquid electrolyte and ITO working electrodes. The copolymers with electron-withdrawing NO2 groups showed better response than that of copolymers containing electron-donating NMe2 groups.

Synthetic Metals published new progress about Electric conductivity. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhang, Nan; Zhang, Yao; Jiang, Huan-Huan; Du, Guo-Wei; Pan, Qiang; Xiong, Ren-Gen; Zhang, Han-Yue published the artcile< Enantiomeric Hydrogen-bonded Chains Driving Ferroelectric and Nonlinear Optical Behavior>, Category: esters-buliding-blocks, the main research area is ferroelec enantiomer homochirality ferroelasticity crystal structure.

Organic multiferroic materials have been widely investigated due to their novel phys. properties and broad applications. However, the discovery of organic small-mol. multiferroic compounds is still rare. Herein, based on the chem. design strategy of introducing homochirality, we present a pair of enantiomeric organic small-mol. compounds [HDABCO (1,4-diazabicyclo[2.2.2]octonium)][L- and D-MA (malic acid)], which displays high Curie temperatures (Tc) of 409/412 K, superior optoelectronic performance, and unique ferroelec. and ferroelastic nature. In comparison with the reported ferroelecs. with the [HDABCO]+ cation chain structure, the enantiomers show a neutral one-dimensional chain, where hydrogen bonds connect [HDABCO]+ cations and [MA]- anions. Strikingly, [HDABCO][L- and D-MA] exhibit a large second harmonic generation (SHG) intensity of about 2.46 and 2.53 times that of KH2PO4 (KDP), exceeding those of all the organic ferroelecs. (about 0.2-1 x KDP). With excellent SHG signal and ferroic properties, as well as the merit of low acoustic impedance z0 matching that of the body and easy processing, [HDABCO][L- and D-MA] are potential candidates for future biocompatible electronic devices with multi-functionality.

Chemistry of Materials published new progress about Acoustic impedance. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Schoss, Katja; Kocevar Glavac, Nina; Dolenc Koce, Jasna; Anzlovar, Sabina published the artcile< Supercritical CO2 Plant Extracts Show Antifungal Activities against Crop-Borne Fungi>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is supercritical carbon dioxide plant extract fungus antifungal activity; Botrytis cinerea; Chamomilla recutita; antifungal activity; growth inhibition; plant extract; supercritical CO2 extraction.

Fungal infections of cultivated food crops result in extensive losses of crops at the global level, while resistance to antifungal agents continues to grow. Supercritical fluid extraction using CO2 (SFE-CO2) has gained attention as an environmentally well-accepted extraction method, as CO2 is a non-toxic, inert and available solvent, and the extracts obtained are, chem., of greater or different complexities compared to those of conventional extracts The SFE-CO2 extracts of Achillea millefolium, Calendula officinalis, Chamomilla recutita, Helichrysum arenarium, Humulus lupulus, Taraxacum officinale, Juniperus communis, Hypericum perforatum, Nepeta cataria, Crataegus sp. and Sambucus nigra were studied in terms of their compositions and antifungal activities against the wheat- and buckwheat-borne fungi Alternaria alternata, Epicoccum nigrum, Botrytis cinerea, Fusarium oxysporum and Fusarium poae. The C. recutita and H. arenarium extracts were the most efficacious, and these inhibited the growth of most of the fungi by 80% to 100%. Among the fungal species, B. cinerea was the most susceptible to the treatments with the SFE-CO2 extracts, while Fusarium spp. were the least. This study shows that some of these SFE-CO2 extracts have promising potential for use as antifungal agents for selected crop-borne fungi.

Molecules published new progress about Achillea millefolium. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics