Category: esters-buliding-blocks

Zhang, Hua; Wang, Zheyuan; Wang, Zirui; Chu, Yunpeng; Wang, Shuncheng; Hui, Xin-Ping published the artcile< Visible-Light-Mediated Formal Carbene Insertion Reaction: Enantioselective Synthesis of 1,4-Dicarbonyl Compounds Containing All-Carbon Quaternary Stereocenter>, HPLC of Formula: 94-02-0, the main research area is dicarbonyl compound preparation enantioselective; diketone diazoester carbene insertion visible light.

Authors developed an efficient visible-light-mediated formal carbene insertion reaction of 1,3-diketones with diazoesters for the construction of enantioenriched 1,4-dicarbonyl compounds with a quaternary carbon center. Combining visible light and a Bronsted acid catalyst, chiral 1,4-dicarbonyl compounds were achieved in good yields with high enantioselectivities by a photochem. carbene transfer protocol.

ACS Catalysis published new progress about Diazo compounds, aryl Role: RCT (Reactant), RACT (Reactant or Reagent). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, HPLC of Formula: 94-02-0.

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

Ouyang, Siming; Xie, Yuqing; Fu, Wangxing; Ding, Yongbo; Shen, Liang published the artcile< Preparation of autoxidative water-reducible alkyd resins from waste polyethylene terephthalate>, Related Products of 112-63-0, the main research area is autoxidative aqueous reducible alkyd resin waste polyethylene terephthalate; hardness; physical properties; waste polyethylene terephthalate; water resistance; water-borne alkyd resin.

In this paper, the waste polyethylene terephthalate (PET) was glycolyzed by trimethylolpropane with zinc acetate as catalyst. The effects of different content glycolysis product of waste PET on the appearance, viscosity, particle size and mol. weight of autoxidative water-reducible alkyd resins and the corresponding film adhesion, flexibility, impact resistance, gloss, hardness and chem. resistance were studied. Meanwhile, exptl. results were compared with com. water-reducible alkyd and water-reducible alkyd without the glycolysis product of waste PET. The results show that the maximum concentration of PET in autoxidative waterreducible alkyd resins can reach 8.5 weight%, and the mol. weight, particle size and viscosity of water-reducible alkyd resin do not change much with the increase of PET concentration The introduction of PET resulted in the viscosity of waterreducible alkyd resins being greater than that of water-reducible alkyd resin without PET; this is mainly because PET contains harder terephthalic acid monomer units. However, the particle size of water-reducible alkyd resins with waste PET is significantly lower than that of the water-reducible alkyd resin without PET; this is due to PET-free water-reducible alkyd resin containing more pentaerythritol with greater steric hindrance. In addition, the hardness of the water-reducible alkyd resin paint film (PET content is 8.5%) reaches 1H, which is higher than the hardness (HB) of the water-reducible alkyd resin paint film without PET and the com. alkyd resin paint film, while the phys. properties and chem. resistance of the former are comparable to those of the latter two kinds of paint films. Therefore, the use of waste PET in water-borne coatings systems not only reduces the cost of coatings, but also opens up a new market for recycled PET, which may contribute a promising method for management of waste PET.

Royal Society Open Science published new progress about Adhesion, physical. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

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

Thi Ngo, Men; Han, Jae Woo; Van Nguyen, Minh; Le Dang, Quang; Kim, Hun; Choi, Gyung Ja published the artcile< Antifungal properties of natural products from Pterocarya tonkinensis against phytopathogenic fungi>, Recommanded Product: (S)-Dimethyl 2-hydroxysuccinate, the main research area is Pterocarya antifungal phytopathogenic fungus.

The objectives of this article were (i) to isolate and identify the antifungal substances from the Pterocarya tonkinensis extract based on a bioassay-guided fractionation and (ii) to investigate their potential as a biocontrol agent with their antifungal activities in vitro and in vivo. Eighteen compounds were identified from methanol extract of Pterocarya tonkinensis, including two new natural products 1 and 2: 1, pterocaryalactone; 2, pterocaryafuranone; 3, (1S, 6R)-9-hydroxymegastigm-7-en-3-one; 4, (S)-di-Me malate; 5, α-linolenic acid; 6-8, α-tetralones; 9, (R)-methyl-2-hydroxyl-3-phenyl-propanoate; 10, (E)-4-hydroxycinnamic acid Me ester; 11-14, diarylheptanoids, and 15-18, pentacyclic triterpenoids. Based on results of in vitro antifungal assay, Magnaporthe oryzae and Phytophthora infestans were most sensitive to isolated compounds among tested phytopathogenic fungi. When ten active compounds were applied onto plants at concentration of 100 or 500 μg mL-1, compounds 1 and 8 effectively suppressed rice blast disease, and compounds 15 and 16 not only strongly reduced development of blast on rice but also effectively controlled the development of late blight on tomatoes. This is first report to evaluate the in vitro and in vivo antifungal activities of the isolated compounds from a methanol extract of Pterocarya tonkinensis against phytopathogenic fungi, and our results suggest that Pterocarya tonkinensis and its substances can be used as source to develop natural fungicides.

Pest Management Science published new progress about Alternaria brassicicola. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Recommanded Product: (S)-Dimethyl 2-hydroxysuccinate.

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

Zhang, Ding-Li; Hu, Yi-Kao; Wang, Ji-Hua; Zhao, Yan; Huang, Yu-Ping; Zeng, Gui-Jun; Zhao, Yong published the artcile< A New Monoterpenoid Glycoside from Syzygium fluviatile>, Synthetic Route of 112-63-0, the main research area is Syzygium Fluviaterpenoside monoterpenoid glycoside.

A new monoterpenoid glycoside, together with seven known aliphatic acid derivatives, was isolated from the twigs and leaves of Syzygium fluviatile. Their structures were elucidated by means of NMR and HR-ESI-MS data and comparison with the reported values. This is the first example of a monoterpenoid glycoside from Syzygium plants.

Chemistry of Natural Compounds published new progress about Leaf. 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

Wen, Zhe; Ma, Zewei; Mai, Fuhang; Yan, Fei; Yu, Linhao; Jin, Meng; Sang, Yushuai; Bai, Yunfei; Cui, Kai; Wu, Kai; Chen, Mengmeng; Chen, Hong; Li, Yongdan published the artcile< Catalytic ethanolysis of microcrystalline cellulose over a sulfonated hydrothermal carbon catalyst>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is catalytic ethanolysis microcrystalline cellulose sulfonated hydrothermal carbon catalyst.

The catalytic ethanolysis of microcrystalline cellulose in supercritical ethanol is examined over a sulfonated hydrothermal carbon catalyst (SHTC). SHTC is amorphous carbon containing -OH, -COOH and -SO3H groups with total acidity of 7.15 mmol/g and -SO3H acidity of 1.72 mmol/g. SHTC shows high catalytic activity towards the ethanolysis of cellulose in supercritical ethanol. Complete conversion of microcrystalline cellulose with high yields of Et levulinate and Et glucoside is obtained. The reaction temperature, time and catalyst amount have significant effects on the catalytic performances of SHTC. Appropriate reaction time and less catalyst amount are favorable for the production of Et glucoside, while prolonged reaction time and appropriate catalyst amount favor the production of Et levulinate. The highest yield of Et glucoside as 420.9 mg/g cellulose is obtained over 0.1 g SHTC at 245°C for 1 h. The highest yield of Et levulinate as 817.6 mg/g cellulose is achieved over 0.3 g SHTC at 245°C for 1 h. SHTC shows good stability in the recycle experiments with slight loss of catalytic activity.

Catalysis Today published new progress about Ethanolysis. 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

Hu, Jingyan; Ji, Xiaoming; Hao, Shuai; Zhao, Mingqin; Lai, Miao; Ren, Tianbao; Xi, Gaolei; Wang, Erbin; Wang, Juanjuan; Wu, Zhiyong published the artcile< Regioselective C-H sulfenylation of N-sulfonyl protected 7-azaindoles promoted by TBAI: a rapid synthesis of 3-thio-7-azaindoles>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is thioazaindole regioselective preparation; chloride sulfonyl protected azaindole TBAI CH sulfenylation.

This paper described the synthesis of 3-thio-7-azaindoles I [R1 = H, 2-Me, 5-Cl, 5-Br, 2-I; R2 = Ph, 4-FC6H4, 4-MeC6H4, etc.] via regioselective C-3 sulfenylation of N-sulfonyl protected 7-azaindoles with sulfonyl chlorides. In this transformation, dual roles of TBAI served as both promoter and desulfonylation reagent was demonstrated. The reaction proceeded smoothly under simple conditions to afford 3-thio-7-azaindoles I in moderate to good yields with broad substrate scopes. This protocol refrained from the use of transition-metal catalysts, strong oxidants or bases and showed its practical synthetic value in organic synthesis.

RSC Advances published new progress about Arenesulfonyl chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Knight, Steven D.; Adams, Nicholas D.; Burgess, Joelle L.; Chaudhari, Amita M.; Darcy, Michael G.; Donatelli, Carla A.; Luengo, Juan I.; Newlander, Ken A.; Parrish, Cynthia A.; Ridgers, Lance H.; Sarpong, Martha A.; Schmidt, Stanley J.; Van Aller, Glenn S.; Carson, Jeffrey D.; Diamond, Melody A.; Elkins, Patricia A.; Gardiner, Christine M.; Garver, Eric; Gilbert, Seth A.; Gontarek, Richard R.; Jackson, Jeffrey R.; Kershner, Kevin L.; Luo, Lusong; Raha, Kaushik; Sherk, Christian S.; Sung, Chiu-Mei; Sutton, David; Tummino, Peter J.; Wegrzyn, Ronald J.; Auger, Kurt R.; Dhanak, Dashyant published the artcile< Discovery of GSK2126458, a Highly Potent Inhibitor of PI3K and the Mammalian Target of Rapamycin>, Formula: C19H34O2, the main research area is cancer PI3K inhibitor antitumor agent quinoline derivative SAR preparation; GSK2126458; PI3K/AKT pathway; mammalian target of rapamycin; phosphoinositide 3-kinase α.

Phosphoinositide 3-kinase α (PI3Kα) is a critical regulator of cell growth and transformation, and its signaling pathway is the most commonly mutated pathway in human cancers. The mammalian target of rapamycin (mTOR), a class IV PI3K protein kinase, is also a central regulator of cell growth, and mTOR inhibitors are believed to augment the antiproliferative efficacy of PI3K/AKT pathway inhibition. 2,4-Difluoro-N-{2-(methyloxy)-5-[4-(4-pyridazinyl)-6-quinolinyl]-3-pyridinyl}benzenesulfonamide (GSK2126458, 1 (I)) has been identified as a highly potent, orally bioavailable inhibitor of PI3Kα and mTOR with in vivo activity in both pharmacodynamic and tumor growth efficacy models. Compound 1 is currently being evaluated in human clin. trials for the treatment of cancer.

ACS Medicinal Chemistry Letters published new progress about Antitumor agents. 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

Lee, Bongyong; Mohamad, Iqbal; Pokhrel, Rudramani; Murad, Rabi; Yuan, Menglang; Stapleton, Stacie; Bettegowda, Chetan; Jallo, George; Eberhart, Charles G.; Garrett, Timothy; Perera, Ranjan J. published the artcile< Medulloblastoma cerebrospinal fluid reveals metabolites and lipids indicative of hypoxia and cancer-specific RNAs>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is RNA lipid cerebrospinal fluid hypoxia medulloblastoma; Circular RNA; Lipidomics; Medulloblastoma; Metabolomics; TCA; Transcriptomics.

Medulloblastoma (MB) is the most common malignant brain tumor in children. There remains an unmet need for diagnostics to sensitively detect the disease, particularly recurrences. Cerebrospinal fluid (CSF) provides a window into the central nervous system, and liquid biopsy of CSF could provide a relatively non-invasive means for disease diagnosis. There has yet to be an integrated anal. of the transcriptomic, metabolomic, and lipidomic changes occurring in the CSF of children with MB. CSF samples from patients with (n = 40) or without (n = 11; no cancer) MB were subjected to RNA-sequencing and high-resolution mass spectrometry to identify RNA, metabolite, and lipid profiles. Differentially expressed transcripts, metabolites, and lipids were identified and their biol. significance assessed by pathway anal. The DIABLO multivariate anal. package (R package mixOmics) was used to integrate the mol. changes characterizing the CSF of MB patients. Differentially expressed transcripts, metabolites, and lipids in CSF were discriminatory for the presence of MB but not the exact mol. subtype. One hundred and ten genes and ten circular RNAs were differentially expressed in MB CSF compared with normal, representing TGF-β signaling, TNF-α signaling via NF-kB, and adipogenesis pathways. Tricarboxylic acid cycle and other metabolites (malate, fumarate, succinate, α-ketoglutarate, hydroxypyruvate, N-acetyl-aspartate) and total triacylglycerols were significantly upregulated in MB CSF compared with normal CSF. Although separating MBs into subgroups using transcriptomic, metabolomic, and lipid signatures in CSF was challenging, we were able to identify a group of omics signatures that could sep. cancer from normal CSF. Metabolic and lipidomic profiles both contained indicators of tumor hypoxia. Our approach provides several candidate signatures that deserve further validation, including the novel circular RNA circ_463, and insights into the impact of MB on the CSF microenvironment.

Acta Neuropathologica Communications published new progress about 14-3-3 Protein YWHAG Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

di Bitonto, Luigi; Locaputo, Vito; D’Ambrosio, Valeria; Pastore, Carlo published the artcile< Direct Lewis-Bronsted acid ethanolysis of sewage sludge for production of liquid fuels>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is liquid fuel sewage sludge ethanolysis catalytic wastewater treatment.

Ethanolysis carried out under Lewis-Bronsted acid catalysis was investigated as a possible process to valorize the organic fraction of urban sewage sludge, with the aim of selectively obtaining liquid biofuels. In a single reactive step, the conversion of lipids into fatty acid Et esters, of carbohydrates into Et levulinate, furanic compounds and Et glycosides and of proteins into Et ester of amino acids was achieved. The optimization of reactive conditions was conducted using pure chems. as model compounds The effect of the co-presence of water was also considered. Then, real samples of sewage sludge (as dried and wet centrifuged samples) were reacted in ethanol in the presence of the appropriate combination of homogeneous Lewis-Bronsted acid catalysts, namely 1%wt aluminum chloride hexahydrate and sulfuric acid respect to ethanol. After 6 h at 453 K, 99% of lipids and almost 60% of initial complex sugars were effectively converted into the abovementioned target products. Conversions and yields were quite similar to those obtained by reacting pure compounds singularly, confirming the robustness of the process and its applicability to differently composed sludge. At the end of the reaction, products were easily recovered and purified from the alc. phase, whereas only a very limited amount of solids remain as inert materials. Final refined biofuels have high calorific values (37 and 40 MJ kg-1) and actually represent the 68.5 and 59.2% of the initial energy content of starting sludge, resp. This strategy combines valorization of the starting organic fraction of sewage sludge and a considerable reduction of final solid waste (in a stabilized form) to be disposed of. Finally, through a preliminary feasibility study, this acid ethanolysis resulted in a competitive alternative to the anaerobic digestion of mixed sewage sludge to obtain biofuels.

Applied Energy published new progress about Biofuels. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Dash, Pragyanditi; Janni, Manojkumar; Peruncheralathan, S. published the artcile< Trideuteriomethoxylation of Aryl and Heteroaryl Halides>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is trideuteriomethoxylation aryl heteroaryl halide perdeuteriomethanol palladium catalyst; ether trideuteriomethyl preparation.

Direct access to trideuteriomethoxylated aromatic and heteroaromatic compounds has been developed. Various aryl and heteroaryl halides underwent d3-methoxylation under mild reaction conditions by using a catalyst system composed of the com. available monodentate phosphane ligand tBuXPhos and Pd(OAc)2. Inexpensive CD3OD served as an efficient trideuteriomethoxylating agent.

European Journal of Organic Chemistry published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 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