Tag: M.W=250-300

Park, Hye-Rin; Choi, Hee-Jung; Kim, Bo-Sung; Chung, Tae-Wook; Kim, Keuk-Jun; Joo, Jong-Kil; Ryu, Dongryeol; Bae, Sung-Jin; Ha, Ki-Tae published the artcile< Paeoniflorin enhances endometrial receptivity through leukemia inhibitory factor>, Synthetic Route of 112-63-0, the main research area is endometrial receptivity leukemia inhibitory factor paeoniflorin; embryo implantation; endometrial receptivity; leukemia inhibitory factor; paeoniflorin.

Despite advances in assisted reproductive technol., treatment for deficient endometrial receptivity is a major clin. unmet need. In our previous study, the water extract of Paeonia lactiflora Pall. enhanced endometrial receptivity in vitro and in vivo via induction of leukemia inhibitory factor (LIF), an interleukin (IL)-6 family cytokine. In the present study, we found that paeoniflorin, a monoterpene glycoside, is the major active compound of P. lactiflora. Paeoniflorin significantly improved the embryo implantation rate in a murine model of mifepristone (RU486)-induced implantation failure. In addition, paeoniflorin increased the adhesion of human trophectoderm-derived JAr cells to endometrial Ishikawa cells through the expression of LIF in vitro. Moreover, using the National Center for Biotechnol. Information (NCBI) Gene Expression Omnibus (GEO) database of the human endometrium, we confirmed that LIF signaling is a key regulator for improving human endometrial receptivity. Therefore, these results suggest that paeoniflorin might be a potent drug candidate for the treatment of endometrial implantation failure by enhancing endometrial receptivity..

Biomolecules published new progress about Cell adhesion. 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

Oehlke, Alexander; Auer, Alexander A.; Jahre, Ina; Walfort, Bernhard; Rueffer, Tobias; Zoufala, Petra; Lang, Heinrich; Spange, Stefan published the artcile< Nitro-substituted stilbeneboronate pinacol esters and their fluoro-adducts. Fluoride ion induced polarity enhancement of arylboronate esters>, HPLC of Formula: 112-63-0, the main research area is boronate dioxaborolane stilbene nitro derivative preparation complexation fluoride anion; formation constant equilibrium fluoride addition boronate nitrostilbene derivative; UV vis spectra solvatochromism nitrostilbene boronate derivative fluoride adduct; solvent effect Kamlet Taft equation boronate nitrostilbene fluoride adduct; optimized mol structure dioxaborolane stilbene nitro derivative fluoride adduct; excitation energy vertical dioxaborolane stilbene nitro derivative fluoride adduct; bond length conjugate dioxaborolane stilbene nitro derivative fluoride adduct; hydrogen bonding solvent dioxaborolane stilbene nitro derivative fluoride adduct; electron density NBO dioxaborolane stilbene nitro derivative fluoride adduct; crystal structure dioxaborolane stilbene nitro derivative; mol structure dioxaborolane stilbene nitro derivative.

A series of stilbeneboronate pinacol cyclic esters, containing none to three nitro groups, (E)-(CMe2O)2B-1,4-C6H4CH:CHC6Hn(NO2)5-n-2,4,6 (3-6; n = 0-3) were prepared by Horner-Emmons-Wadsworth olefination of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzaldehyde (2) or by condensation of 2 with 2,4-dinitrophenylacetic acid or 2,4,6-trinitrotoluene. Compounds 3-6 were characterized by x-ray single-crystal structure anal. Compounds 3-6 undergo reversible and solvent-dependent addition of fluoride ion by reaction with Bu4NF, forming adducts 3路F–6路F-; the equilibrium systems feature isosbestic points in UV-vis. spectra. A stilbeneboronate ester bearing electron-acceptor groups experiences transition to a push-pull 蟺-electron system upon complexation with one fluoride ion at the boron atom. The UV-vis absorption maxima of the presented nitro-substituted stilbeneboronate esters are red-shifted upon addition of fluoride ions, indicating this binding event. The enhancement of the polarity of the investigated compounds and the changes in the electronic system were investigated by UV-vis absorption spectroscopy and solvatochromism. Addnl., studies were performed by natural bond orbital (NBO) anal. and RI-CC2 calculations of the vertical excitation energies. The synergism of fluoride ion complexation and solvation upon the UV-vis band shift is interpreted in terms of linear solvation energy relationships (LSERs) using the Kamlet-Taft solvent parameter set. It is found that the UV-vis absorption of the fluoro-boronates is strongly dependent on the solvents hydrogen-bond donating ability.

Journal of Organic Chemistry published new progress about Aromatic hydrocarbons Role: FMU (Formation, Unclassified), PEP (Physical, Engineering or Chemical Process), PRP (Properties), SPN (Synthetic Preparation), FORM (Formation, Nonpreparative), PROC (Process), PREP (Preparation) (stilbenes, boronates). 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

Baldwin, John J.; Christy, Marcia E.; Denny, George H.; Habecker, Charles N.; Freedman, Mark B.; Lyle, Paulette A.; Ponticello, Gerald S.; Varga, Sandor L.; Gross, Dennis M.; Sweet, Charles S. published the artcile< 尾1-Selective adrenoceptor antagonists: examples of the 2-[4-[3-(substituted amino)-2-hydroxypropoxy]phenyl]imidazole class. II>, SDS of cas: 112-63-0, the main research area is imidazole aminohydroxypropoxyphenyl; aminohydroxypropoxyphenylimidazole preparation adrenoceptor antagonist.

An attempt to develop a highly cardioselective 尾-adrenoceptor antagonist devoid of intrinsic sympathetic activity (ISA) focused on exploring structure-activity relationships around imidazole (S)-I (R = 2-thienyl, X = bond). Strategies to reduce or eliminate ISA centered on structural changes that could influence activation of the receptor by the drug itself or by a metabolite. The approaches involved eliminating the acidic imidazole N-H proton, incorporating substituents ortho to the 尾-adrenergic blocking side chain, increasing steric bulk around the N-H moiety, decreasing lipophilicity, introducing intramol. hydrogen bonding involving the imidazole N-H, and displacing the imidazole ring from an activating position by the incorporation of a spacer element. The compounds were investigated in vitro for 尾-adrenoceptor antagonism and in vivo for ISA. From these studies, the most successful variation involved the insertion of a spacer between the imidazole and aryl rings. (S)-I.HCl (R = MeCO, X = CH2) was highly cardioselective (dose ratio 尾2/尾1 > 9333) and devoid of ISA.

Journal of Medicinal Chemistry published new progress about 尾1-Adrenoceptor antagonists. 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

Aboelazayem, Omar; Gadalla, Mamdouh; Saha, Basudeb published the artcile< Comprehensive Optimization of Biodiesel Production Conditions via Supercritical Methanolysis of Waste Cooking Oil>, Related Products of 112-63-0, the main research area is waste cooking oil biodiesel production optimization methanolysis.

Biodiesel has been established as a promising alternative fuel to petroleum diesel. This study offers a promising energy conversion platform to valorise high acidity waste cooking oil (WCO) into biodiesel in a single-step reaction via supercritical methanol. Carbon dioxide (CO2) has been used as a co-solvent in the reaction with a catalytic effect to enhance the production of biodiesel. This work provides an in-depth assessment of the yield of four fatty acids Me esters (FAME) from their correspondent triglycerides and fatty acids. The effects of four independent process variables, i.e., methanol to oil (M:O) molar ratio, temperature, pressure, and time, have been investigated using Response Surface Methodol. (RSM). Four quadratic models have been developed between process variables and the yield of FAMEs. The statistical validation of the predicted models has been performed using anal. of variance (ANOVA). Numerical optimization has been employed to predict the optimal conditions for biodiesel production The predicted optimal conditions are at 25:1 M:O molar ratio, 254.7掳C, 110 bar within 17 min resulting in 99.2%, 99.3%, 99.13%, and 99.05% of methyl-oleate, methyl-palmitate, methyl-linoleate, and methyl-stearate yields, resp. The predicted optimum conditions have been validated exptl.

Energies (Basel, Switzerland) published new progress about Biodiesel fuel. 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

Nowacki, Andrzej; Liberek, Beata published the artcile< Comparative conformational studies of 3,4,6-tri-O-acetyl-1,5-anhydro-2-deoxyhex-1-enitols at the DFT level>, Product Details of C12H16O7, the main research area is conformation triacetylanhydro deoxyhexenitols DFT calculation; Allylic effect; B3LYP; Conformation; Glycal; M06鈥?X; Quasi 1,3-diaxial interactions; Vinylogous anomeric effect.

B3LYP and M06-2X optimization and MP2 single point calculations are reported for the 4H5 and 5H4 conformations of 3,4,6-tri-O-acetyl-D-allal, 3,4,6-tri-O-acetyl-D-galactal, 3,4,6-tri-O-acetyl-D-glucal, and 3,4,6-tri-O-acetyl-D-gulal. Significant discrepancies in predictions of relative energies and conformers’ population for B3LYP and M06-2X optimized geometries are observed Generally, B3LYP overestimates the conformers’ energies with respect to MP2, whereas M06-2X slightly underestimates the conformers’ energies. B3LYP failed to estimate the 4H5鈬?H4 conformational equilibrium for 3,4,6-tri-O-acetyl-D-galactal and 3,4,6-tri-O-acetyl-D-glucal. The M06-2X functional showed good agreement with exptl. results for all glycals studied. The 4H5鈬?H4 conformational equilibrium for 3,4,6-tri-O-acetyl-D-allal and 3,4,6-tri-O-acetyl-D-gulal is governed by the vinylogous anomeric effect (VAE), whereas competition between the VAE and quasi 1,3-diaxial interactions influence this equilibrium for 3,4,6-tri-O-acetyl-D-galactal and 3,4,6-tri-O-acetyl-D-glucal. The orientation of the 4-OAc group influences the strength of the quasi 1,3-diaxial interactions between the 3-OAc and 5-CH2OAc groups. AIM anal. shows weak bonding interaction between the 3-OAc and 5-CH2OAc groups.

Carbohydrate Research published new progress about Conformational free energy. 4098-06-0 belongs to class esters-buliding-blocks, and the molecular formula is C12H16O7, Product Details of C12H16O7.

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

Bojanowski, Jan; Albrecht, Anna published the artcile< Doubly Decarboxylative Synthesis of 4-(Pyridylmethyl)chroman-2-ones and 2-(Pyridylmethyl)chroman-4-ones under Mild Reaction Conditions.>, Category: esters-buliding-blocks, the main research area is pyridylmethyl chromanone preparation; carboxy chromanone pyridyl acetic acid decarboxylative Michael addition; Michael addition; chromone-3-carboxylic acid; coumarin-3-carboxylic acid; decarboxylation.

The doubly decarboxylative Michael-type addition of pyridylacetic acid to chromone-3-carboxylic acids or coumarin-3-carboxylic acids were developed. This protocol was realized under Bronsted base catalysis, providing biol. interesting 4-(pyridylmethyl)chroman-2-ones and 2-(pyridylmethyl)chroman-4-ones in good or very good yields. The decarboxylative reaction pathway was confirmed by mechanistic studies. Moreover, an attempts to develop enantioselective variant of the cascade was described.

Molecules published new progress about C-H bond activation. 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

Gul, M.; Zulkifli, N. W. M.; Masjuki, H. H.; Kalam, M. A.; Mujtaba, M. A.; Harith, M. H.; Syahir, A. Z.; Ahmed, Waqar; Bari Farooq, Abdul published the artcile< Effect of TMP-based-cottonseed oil-biolubricant blends on tribological behavior of cylinder liner-piston ring combinations>, Quality Control of 112-63-0, the main research area is TMP cottonseed oil biolubricant blend tribol behavior automotive engine.

Cottonseed oil-based biolubricant was synthesized by the TMP-based transesterification process. 10-50% by volume blends of TMP-based cotton-biolubricant and SAE-40 were prepared and tested on the high-frequency-reciprocating-rig with engine cylinder-liner and piston-ring combination to investigate their tribol. While tribol. characteristics were also evaluated by four-ball tribo-testers at high constant load of 785 N. 10% addition of cotton-biolubricant showed the lowest friction and wear as compared to SAE-40 but>10% volume of cotton biolubricant in blend increased the wear and friction considerably as tested by both HFRR and four-ball. Hence, 10% addition of TMP-cotton-biolubricant can be utilized as an energy-saving lubricant additive to partially reduce the dependency on petroleum-based lubricant for automotive engine application.

Fuel published new progress about Crankcase oil. 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

Fuerstner, Alois; Bonnekessel, Melanie; Blank, Jarred T.; Radkowski, Karin; Seidel, Guenter; Lacombe, Fabrice; Gabor, Barbara; Mynott, Richard published the artcile< Total synthesis of myxovirescin A1>, Synthetic Route of 112-63-0, the main research area is myxovirescin A1 total synthesis regioselective Negishi Suzuki coupling; stereoselective hydrogenation oxyallylation total synthesis myxovirescin A1; ring closing metathesis total synthesis myxovirescin A1; hydrosilylation trans total synthesis myxovirescin A1.

A convergent total synthesis of the antibiotic macrolide myxovirescin A1 (I) is described that is largely based on reagent- and catalyst-controlled transformations. This includes a highly regioselective Negishi reaction of dibromo-alkene (E)-BrCH:CBrCH2OMe with an alkynyl-zinc reagent, and a palladium catalyzed alkyl-Suzuki coupling of the resulting enyne derivative (E)-MeC顚咰CH:CBrCH2OMe (II) with the 9-BBN-adduct derived from alkene III. The latter was obtained via an asym. hydrogenation of the chlorinated 尾-ketoester EtO2CCH2COCH2Cl and an anti-selective oxyallylation of the functionalized aldehyde (S)-OHCCH2CH(CH2N3)OCH2OMe as the key steps. The preparation of a bis-borylated allyl-donor used in the oxyallylation step, however, required careful optimization and led to important insights into the nature of the classical hydroborating agent “”di(isopinocampheyl)borane (Ipc2BH)””. It was unambiguously shown by X-ray crystallog. that in the solid state this compound is dimeric, but it is prone to undergo an essentially quant. mono-deborylation when dissolved in CH2Cl2 or benzene; its composition in ethereal solvents is even more complex as evident from 11B NMR data. The product derived from II and III was elaborated into the enyne-yne derivative IV, which served as the substrate for an exquisitely selective ring closing alkyne metathesis reaction (RCAM) catalyzed by a molybdenum tris-amido complex activated in situ with CH2Cl2. The resulting cyclic enyne was subjected to a ruthenium catalyzed trans-hydrosilylation/proto-desilylation tandem. Although [Cp*Ru(MeCN)3]PF6 had previously been recommended as catalyst of choice for trans-hydrosilylation reactions of internal alkynes, this complex failed to afford the desired product, whereas its sterically less hindered congener [CpRu(MeCN)3]PF6 permitted the reaction to be performed in appreciable yield, but at the expense of a lower stereoselectivity. AgF-mediated proto-desilylation of the isomeric silanes followed by cleavage of the remaining acetal protecting groups afforded myxovirescin A1 and its hitherto unknown 14Z-isomer.

Chemistry – A European Journal published new progress about Allylation (oxyallylation). 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

Hong, Dan-Yan; Liu, Yungen; Wu, Liangliang; Lo, Vanessa Kar-Yan; Toy, Patrick H.; Law, Siu-Man; Huang, Jie-Sheng; Che, Chi-Ming published the artcile< RuV-Acylimido Intermediate in [Ru(IV)(Por)Cl2]-Catalyzed C-N Bond Formation: Spectroscopic Characterization, Reactivity, and Catalytic Reactions>, Name: (2R,3R,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate, the main research area is ruthenium catalyzed acylnitrene transfer organic substrate alkene; aryl indolylamide preparation crystal structure; mol structure aryl indolylamide; C鈭扤 bond formation; RuV-imido complex; acylnitrene transfer; porphyrinoids; ruthenium.

Metal-catalyzed C-N bond formation reactions via acylnitrene transfer have recently attracted much attention, but direct detection of the proposed acylnitrenoid/acylimido M(NCOR) (R = aryl or alkyl) species in these reactions poses a formidable challenge. Herein, the authors report on Ru(NCOR) intermediates in C-N bond formation catalyzed by [Ru(IV)(Por)Cl2]/N3COR, a catalytic method applicable to aziridine/oxazoline formation from alkenes, amination of substituted indoles, 伪-amino ketone formation from silyl enol ethers, amination of C(sp3)-H bonds, and functionalization of natural products and carbohydrate derivatives (up to 99% yield). Exptl. studies, including HR-ESI-MS and EPR measurements, coupled with DFT calculations, lend evidence for the formulation of the Ru(NCOR) acylnitrenoids as a Ru(V)-imido species.

Angewandte Chemie, International Edition published new progress about Alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 4098-06-0 belongs to class esters-buliding-blocks, and the molecular formula is C12H16O7, Name: (2R,3R,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate.

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

Tripathi, Prashasti; Puranik, Vineeta; Purwar, Shalini published the artcile< Comparison of branded and non-branded food samples widely consumed in north India with reference to Trans fatty acid content>, Application of C19H34O2, the main research area is trans fatty acid content branded nonbranded food sample.

Trans fatty acids (TFA) are the geometrical isomers of monounsaturated and polyunsaturated fatty acids that affect the function-al and physicochem. properties of these fatty acids, which in turn affect their metabolism in humans. Since the database available for trans fatty acids in food from India is scarce, the research report generates data about trans fatty acid content in selected foods popular in north India. In this report, various food samples like cookies, chocolates, biscuits, pizza, fries, indigenous snacks like samosa, pakora and indigenous sweets like jalebi, gulab jamun, and laddoo were analyzed for the Trans Fatty Acid (TFA) content by gas chromatog. A large variation was found in trans fatty acid content among these food samples. The results also showed that only 4.5% of the samples were found to contain TFA less than 0.5% while approx. 8% of samples having more than 5% TFA (1 branded and 6 non-branded samples). Also, a large variation was found in the trans fatty acid content of branded and non-branded food samples with the mean value of TFA in branded and non-branded food groups as 1.781 and 6.125 resp. and the t-value of 0.852 between the two groups. When regulations are emphasizing on labeling the TFA content on the product, there are arrays of unlabeled products which are not governed under any regulations. Hence there is a need for strong food regulations to bring levels of trans fats in processed foods to negligible levels.

Journal of Applied and Natural Science published new progress about Bakery cakes. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

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