Month: November 2022

Isidor, Marie S.; Dong, Wentao; Servin-Uribe, Rogelio I.; Villarroel, Julia; Altintas, Ali; Ayala-Sumuano, J. Tonatiuh; Varela-Echavarria, Alfredo; Barres, Romain; Stephanopoulos, Gregory; Macotela, Yazmin; Emanuelli, Brice published the artcile< Insulin resistance rewires the metabolic gene program and glucose utilization in human white adipocytes>, Computed Properties of 112-63-0, the main research area is insulin resistance glucose white adipocyte.

In obesity, adipose tissue dysfunction resulting from excessive fat accumulation leads to systemic insulin resistance (IR), the underlying alteration of Type 2 Diabetes. The specific pathways dysregulated in dysfunctional adipocytes and the extent to which it affects adipose metabolic functions remain incompletely characterized. We interrogated the transcriptional adaptation to increased adiposity in association with insulin resistance in visceral white adipose tissue from lean men, or men presenting overweight/obesity (BMI from 19 to 33) and discordant for insulin sensitivity. In human adipocytes in vitro, we investigated the direct contribution of IR in altering metabolic gene programming and glucose utilization using 13C-isotopic glucose tracing. We found that gene expression associated with impaired glucose and lipid metabolism and inflammation represented the strongest association with systemic insulin resistance, independently of BMI. In addition, we showed that inducing IR in mature human white adipocytes was sufficient to reprogram the transcriptional profile of genes involved in important metabolic functions such as glycolysis, the pentose phosphate pathway and de novo lipogenesis. Finally, we found that IR induced a rewiring of glucose metabolism, with higher incorporation of glucose into citrate, but not into downstream metabolites within the TCA cycle. Collectively, our data highlight the importance of obesity-derived insulin resistance in impacting the expression of key metabolic genes and impairing the metabolic processes of glucose utilization, and reveal a role for metabolic adaptation in adipose dysfunction in humans.

International Journal of Obesity published new progress about Adipocyte. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

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

Lin, Cuiying; Huang, Qingqing; Lu, Yilei; Li, Zhixin; Wang, Peilong; Qiu, Bin; Lin, Zhenyu published the artcile< Detection of hydroxypolychlorinated biphenyls using molecularly imprinted polymers as recognition unit and timer as readout>, SDS of cas: 3290-92-4, the main research area is molecularly imprinted polymer hydroxypolychlorinated biphenyl detection.

The total flow time of an hourglass is depending on the effective diameter of the neck pipe if the amount of sand is fixed. Molecularly imprinted polymers (MIPs) can recognize the targets with high selectivity. In this study, these characters had been combined together and applied to develop a sensor using a simple timer as readout for the first time. Hydroxy polychlorinated biphenyls (OH-PCBs) had been chosen as the model target. If the MIPs had bounded with the OH-PCBs, the imprinting cavity of the MIPs can be blocked by the target, and the effective pore diameter of the column decreased. When the 25 ppb OH-PCBs was adsorbed, the average pore size of the MIPs decreased from 1.4614 nm to 1.3964 nm, and the pore volume decreased from 0.001928 cm3/g to 0.001697 cm3/g. As a result, the total time needed for the complete outflow of a certain amount of water increased accordingly. The total time had a relationship with OH-PCBs concentration in the range of 1.0 to 100 ppb, and the detection limit was as low as 0.3 ppb. The proposed technique has been successfully applied for the detection of 4′-OH-PCB 30 in the environmental samples. The detection of different targets could be easily achieved by simply changing MIPs of different imprints.

Microchemical Journal published new progress about Molecularly imprinted polymers. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, SDS of cas: 3290-92-4.

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

Han, Xiaolong; Jin, Yujuan; Wang, Bohua; Tian, Huafeng; Weng, Yunxuan published the artcile< Reinforcing and Toughening Modification of PPC/PBS Blends Compatibilized with Epoxy Terminated Hyperbranched Polymers>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is epoxy terminated hyperbranched polyester PPC PBS blend preparation property.

Polypropylene carbonate (PPC)/polybutylene succinate (PBS) blends were prepared by melt-blending with terminal epoxy-based hyperbranched polymers (EHBP) as modifier. The thermal properties, mech. properties, rheol. properties and fracture morphol. were characterized by dynamic thermomech. analyzer, thermogravimetric analyzer, electronic universal testing machine, rotating rheometer and scanning electron microscope. Upon addition of EHBP, the difference between the glass transition temperature of PPC and PBS became smaller, indicating the compatibility of PPC and PBS were improved by EHBP. Furthermore, by adding 0.5phr of EHBP, the impact strength increased from 9.55 to 17.31 kJ/m2, the elongation at break increased from 136.29 to 204.39%, and the tensile strength increased from 10.00 to 16.84 MPa. The fracture surface of the PPC/PBS blends became rough with the increase of EHBP, even with large filamentous structures and tiny holes, which further demonstrated that EHBP acted as an excellent toughening effect on PPC/PBS. Gel content anal. confirmed that both phys. and chem. micro-crosslinking were formed after incorporation of EHBP.

Journal of Polymers and the Environment published new progress about Branched polymer chains. 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

Shao, Yuewen; Ba, Shuaijie; Sun, Kai; Gao, Guoming; Fan, Mengjiao; Wang, Junzhe; Fan, Huailin; Zhang, Lijun; Hu, Xun published the artcile< Selective production of valerolactone or 1,4-pentanediol from levulinic acid/esters over Co-based catalyst and importance of synergy of hydrogenation sites and acidic sites>, Quality Control of 112-63-0, the main research area is magnesium cobalt catalyst ethyl levulinate hydrogenation valerolactone pentanediol.

γ-Valerolactone (GVL) or 1,4-pentanediol (1,4-PDO) are the value-added chems., selectivities of which from conversion of levulinic acid/ester depend on balanced distribution of metallic sites and other active sites of the catalysts. In this study, Co-based catalysts with various precursors of LDH structures were synthesized to investigate the roles of hydrogenation, acidic and basic sites in the formation of GVL and 1,4-PDO from Et levulinate (EL). The results indicated that Al in Co-Mg-Al or Co-Al created acidic sites and facilitated cobalt dispersion by developing porous structures and strong interaction with Co species. Kinetic study indicated that the conversion of GVL controlled the formation rate of 1,4-PDO from EL. The superior catalytic activity and recyclability were observed over Co-Mg-Al and Co-Al catalysts, with the selectivity of both of GVL and 1,4-PDO reaching 98%, which was equivalent or superior to noble-metal based catalysts. Bronsted acidic sites in catalyst could facilitate the lactonization of Et 4-hydroxyvalerate to GVL and the ring-opening of GVL to 1,4-PDO, by cooperating with hydrogenation sites. Lewis acidic sites improved the adsorption of substrates and reaction intermediates, accelerating the ring-opening of GVL. The synergy between acidic sites together with hydrogenation sites was the key for achieving the excellent catalytic performance.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Hydrogenation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

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

Chen, Qiangjun; Yin, Changlong; Li, Yongwei; Yang, Zhe; Tian, Zongying published the artcile< Pharmacokinetic interaction between peimine and paeoniflorin in rats and its potential mechanism>, Product Details of C19H34O2, the main research area is peimine paeoniflorin hepatoprotectant CYP3A4 Pgp pharmacokinetic interaction; CYP3A4; Drug–drug interaction; P-gp; transport.

Peimine and paeoniflorin can be combined for the treatment of cough in paediatrics. The interaction during the co-administration could dramatically affect the bioavailability of drugs. The interaction between peimine and paeoniflorin was investigated in this study. The pharmacokinetics of paeoniflorin (20 mg/kg) with or without the coadministration of peimine (5 mg/kg for 10 days before paeoniflorin) was orally investigated in Sprague-Dawley rats (n = 6). The group without the peimine was set as the control group. The metabolic stability of paeoniflorin was studied in rat liver with microsomes. The effect of peimine on the absorption of paeoniflorin was investigated with Caco-2 cell monolayers. The Cmax (244.98 ± 10.95 vs. 139.18 ± 15.14μg/L) and AUC(0-t) (3295.92 ± 263.02 vs. 139.18 ± 15.14 h·μg/L) of paeoniflorin was increased by peimine. The t1/2 was prolonged from 5.33 ± 1.65 to 14.21 ± 4.97 h and the clearance was decreased from 15.43 ± 1.75 to 4.12 ± 0.57 L/h/kg. Consistently, peimine increased the metabolic stability of paeoniflorin with rat liver microsomes with the increased t1/2 (56.78 ± 2.62 vs. 26.33 ± 3.15 min) and the decreased intrinsic clearance (24.42 ± 3.78 vs. 52.64 ± 4.47μL/min/mg protein). Moreover, the transportation of paeoniflorin was also inhibited by peimine as the efflux ratio decreased from 3.06 to 1.63. Peimine increased the systemic exposure of paeoniflorin through inhibiting the activity of CYP3A4 and P-gp. These results provide a reference for further in vivo studies in a broader population.

Pharmaceutical Biology (Abingdon, United Kingdom) published new progress about Combination chemotherapy. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.

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

Kisel, V. M.; Potikha, L. M.; Kovtunenko, V. A. published the artcile< Condensed isoquinolines. Part 9. Alkylation of 7,12-dihydro-5H-isoquino[2,3-a]quinazolin-5-ones>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is isoquinoquinazolinone benzyl halide alkylation; spiroisoquinoquinazolinindane preparation; diazadibenzopleiadene preparation.

The alkylation of 7,12-dihydro-5H-isoquino[2,3-a]quinazolin-5-one proceeds at N(6) or C(7) depending on the type of alkylating agent and reaction conditions. C(7)-alkylation occurs in the presence of base. The secondary alkylation of the 7-alkyl derivatives occurs at the same position under these conditions. Depending on the conditions, the reaction with ortho-xylylene dibromide leads to spiro[5H-isoquino-[2,3-a]quinazolin-7(12H),2′-indane]-5-one or 11-oxo-4b,5,10,16-tetrahydro-11H-10a-azonia-15b-azadibenzo[a,e]pleiadene bromide.

Chemistry of Heterocyclic Compounds (New York)(Translation of Khimiya Geterotsiklicheskikh Soedinenii) published new progress about Alkylation. 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

Kobayashi, Nagao published the artcile< Lid-type inclusion of pyrene-1,3,6,8-tetrasulfonate anion by β-cyclodextrin>, Reference of 112-63-0, the main research area is inclusion lid type pyrenetetrasulfonate cyclodextrin; pyrenetetrasulfonate inclusion beta cyclodextrin.

UV absorption and induced CD studies have indicated a new type of inclusion behavior (‘lid-type’) in cyclodextrin-arene 1:1 host-guest complexes exemplified by the pyrene-1,3,6,8-tetrasulfonate-β-cyclodextrin complex.

Journal of the Chemical Society, Chemical Communications published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

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

Snider, Barry B.; Vo, Nha Huu; Foxman, Bruce M. published the artcile< Manganese(III)-based oxidative fragmentation-cyclization reactions of unsaturated cyclobutanols>, Synthetic Route of 112-63-0, the main research area is oxidative fragmentation cyclization unsaturated cyclobutanol; manganese acetate oxidation unsaturated cyclobutanol.

Allylic cyclobutanols, e.g., I, are oxidatively fragmented by Mn(OAc)3.2H2O in EtOH to give tertiary radicals. These tertiary radicals undergo both 6-endo-cyclization to the α,β-unsaturated ketone to afford α-keto radicals, and 5-exo-cyclization to provide β-keto cyclopentylmethyl radicals. The α-keto radicals produced by 6-endo-cyclization are reduced to ketones or dimerize. The β-keto radicals formed by 5-exo-cyclization are oxidized by Cu(OAc)2 to yield methylenecyclopentanones and rearrange to give 3-oxocyclohexyl radicals that are oxidized by Cu(OAc)2 to afford cyclohexenones. Thus, oxidation of I with 2 equiv Mn(OAc)3.2H2O and 1 equiv Cu(OAc)2 in EtOH for 1 h at reflux affords 22% methylenecyclopentanone II, 1.5% cyclohexenone III, and 44% tricyclic enone IV. Acetylenic cyclobutanols are oxidatively fragmented by Mn(OAc)3.2H2O in EtOH to provide tertiary radicals that cyclize to give α-keto vinyl radicals, which abstract a hydrogen atom to yield methylenecyclopentanones. Pentenylcyclobutanol V is oxidatively fragmented by Mn(OAc)3.2H2O to afford a tertiary radical which cyclizes to furnish cyclopentylmethyl radicals, which are oxidized by Cu(OAc)2 to methylenecyclopentane VI and an isomer.

Journal of Organic Chemistry published new progress about Cyclization. 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

Nguyen, Xuan B.; Nakano, Yuji; Duggan, Nisharnthi M.; Scott, Lydia; Breugst, Martin; Lupton, David W. published the artcile< N-Heterocyclic Carbene Catalyzed (5+1) Annulations Exploiting a Vinyl Dianion Synthon Strategy>, HPLC of Formula: 112-63-0, the main research area is acrylate tethered divinyl ketone NHC catalyst diastereoselective cycloisomerization annulation; hexahydroindene tetralin stereoselective preparation vinyl dianion synthon; enonyl unsaturated ester NHC catalyst dimerization cycloisomerization annulation; cyclohexanone stereoselective preparation vinyl dianion synthon; N-heterocyclic carbenes; enantioselectivity; homoenolates; organocatalysis; synthons.

Direct polarity inversion of conjugate acceptors provides a valuable entry to homoenolates. N-heterocyclic carbene (NHC) catalyzed reactions, in which β-unsubstituted conjugate acceptors undergo homoenolate formation and C-C bond formation twice, have been developed. Specifically, the all-carbon (5+1) annulations give a range of mono- and bicyclic cyclohexanones (31 examples). In the first family of annulations, β-unsubstituted acrylates tethered to a divinyl ketone undergo cycloisomerization, providing hexahydroindenes and tetralins. In the second, partially untethered substrates undergo an intermol. (5+1) annulation involving dimerization followed by cycloisomerization. While enantioselectivity was not possible with the former, the latter proved viable, allowing cyclohexanones to be produced with high levels of enantiopurity (most >95:5 e.r.) and exclusive diastereoselectivity (>20:1 d.r.). Derivatizations and mechanistic studies are also reported.

Angewandte Chemie, International Edition published new progress about Cyclization catalysts, stereoselective. 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

Horia, Raymond; Nguyen, Dan-Thien; Eng, Alex Yong Sheng; Seh, Zhi Wei published the artcile< Using a Chloride-Free Magnesium Battery Electrolyte to Form a Robust Anode-Electrolyte Nanointerface>, Quality Control of 112-63-0, the main research area is chloride magnesium battery electrolyte robust anode electrolyte nanointerface; chloride-free electrolyte; magnesium battery electrolyte; magnesium bis(hexamethyldisilazide); rechargeable magnesium battery; tetrabutylammonium borohydride.

Magnesium bis(hexamethyldisilazide) (Mg(HMDS)2)-based electrolytes are compelling candidates for rechargeable magnesium batteries due to their high compatibility with magnesium metal anode. However, the usual combination of Mg(HMDS)2 with chloride salts limits their practical application due to severe corrosion of cell components and low anodic stability. Herein, we report for the first time, a chloride-free Mg(HMDS)2-based electrolyte in 1,2-dimethoxyethane. By chem. controlling the moisture content using tetrabutylammonium borohydride as a moisture scavenger, the electrolyte demonstrates outstanding electrochem. performance in magnesium plating/stripping, with an average Coulombic efficiency of 98.3% over 150 cycles, and is noncorrosive to cell components. Surface anal. and depth profiling of the magnesium metal anode reveals the formation of a robust solid electrolyte interphase at the anode-electrolyte nanointerface, which allows magnesium plating/stripping to occur reversibly. The electrolyte also demonstrates good compatibility with a copper sulfide nanomaterial cathode, which exhibits a high initial discharge capacity of 261.5 mAh g-1.

Nano Letters published new progress about Abstraction reaction. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

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