Month: November 2022

Vinogradov, Alexander A.; Nifant’ev, Ilya E.; Vinogradov, Alexey A.; Borisov, Roman S.; Ivchenko, Pavel V. published the artcile< Precision rheological study of the effectiveness of polymer cold flow improvers for corn oil based biodiesel>, Category: esters-buliding-blocks, the main research area is precision rheol effectiveness polymer cold flow improver corn oil.

Combination of the precision rheol. and DSC helps to make an objective assessment of the effectiveness of modified copolymers of maleic anhydride with methylidenealkanes and best known com. pour point depressants as cold flow improvers for corn oil based biodiesel.

Mendeleev Communications published new progress about Biodiesel fuel. 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

Larina, L. I.; Vakul’skaya, T. I.; Nefedova, O. B.; Shibanova, E. F.; Lopyrev, V. A.; Voronkov, M. G. published the artcile< Study of electron effects of substituents in 2-substituted benzimidazole derivatives by a proton NMR method>, Product Details of C19H34O2, the main research area is NMR benzimidazole LFER.

NMR chem. shifts (δ) were determined for the protons on C-4 and C-7 and on C-5 and C-6 of 2-substituted benzimidazoles and their anions and protonated forms. In the neutral mols. substituent effects were transmitted to positions 4 and 7 exclusively by conjugation but were transmitted to positions 5 and 6 by both field and resonance mechanisms in a 1:3 ratio. In the anions transmission to positions 5 and 6 involved only conjugation, whereas transmission to positions 4 and 7 involved inductive and resonance effects in a 1:8 ratio. The effects in the protonated forms could not be separated

Doklady Akademii Nauk SSSR published new progress about Inductive effect. 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

Liang, Xiaobo; Deng, Yunjiao; Li, Songsong; Wu, Jingtao; Zhang, Huixuan; Zhang, Zijian published the artcile< Waterborne polyurethane-acrylate-polyaniline: Interfacial hydrogen bonding for enhancing the antistatic, damping, and mechanical properties>, Quality Control of 112-63-0, the main research area is waterborne polyurethane acrylate polyaniline hydrogen bonding antistatic damping coating.

Damping coatings can convert kinetic energy into other forms of energy for consumption and have been widely used for vibration and noise reduction in rail trains, aerospace, automobile industry, and other fields. However, many aspects of damping coating such as, damping, water resistance, heat resistance, mech. properties and antistatic properties require further improvement. In this study, a low-cost conductive polyaniline (PANI) with a simple preparation method was dispersed in N-Me pyrrolidone and added to waterborne polyurethane-acrylate (WPUA) hybrid latexes. The interfacial hydrogen bonding increases the interaction force between mol. chains, effectively improve the water resistance, heat resistance, damping, and mech. properties of WPUA, and endowed WPUA with antistatic properties. Among them, PANI was used as an antistatic medium to be synthesized by chem. oxidation and doped with dodecylbenzene sulfonic acid, and the matrix polymer WPUA was the used of hydroxyethyl methacrylate (HEMA) to combine polyacrylate with waterborne polyurethane (WPU) by chem. bonds. The waterborne polyurethane-acrylate-polyaniline (WPUA-PANI) films were investigated using dynamic light scattering , contact angle measurements , dynamic mech. anal., Fourier-transform IR spectroscopy (FTIR), digital high resistance meter and other characterization methods. It was concluded that the base latex has good stability, and when the PANI dispersion content was 35%, the comprehensive performance of the WPUA-PANI films were the best, in which the maximum water contact angle was 106.8°, the tensile strength was increased from 0.7 MPa to 2.3 MPa, the effective damping temperature range (Tanδ ≥ 0.3) was increased from 50°C to 87°C, and the resistivity was reduced from 6.41E + 7 Ω·cm to 1.38E + 4 Ω·cm, which had better antistatic properties. This study will promote the development and application of damping coatings.

Polymers for Advanced Technologies published new progress about Acrylic polymers, polyester-polyoxyalkylene-polyurethane-, graft Role: POF (Polymer in Formulation), PRP (Properties), SPN (Synthetic Preparation), USES (Uses), PREP (Preparation). 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

Taylor, Scott D.; Kotoris, Christopher C.; Dinaut, A. Nicole; Chen, Mei-Jin published the artcile< Synthesis of aryl(difluoromethylene phosphonates) via electrophilic fluorination of α-carbanions of benzylic phosphonates with N-fluorobenzenesulfonimide>, Reference of 112-63-0, the main research area is benzylic phosphonate carbanion electrophilic fluorination fluorobenzenesulfonimide.

The electrophilic fluorination of a wide variety of benzylic phosphonates with N-fluorobenzenesulfonimide was examined The fluorination reaction proceeds well in the presence of an array of functional groups such as nitro, bromo, ketone, ester, Ph and ether groups. Ph and biphenyl derivatives containing two α,α-difluoromethylenephosphonate groups can also be prepared This procedure is compatible with Me or Et phosphonate esters but not with t-Bu esters or with benzylic phosphonates containing an addnl. benzylic moiety at the para-position.

Tetrahedron published new progress about Carbanions Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Xu, Yuan; He, Hong; Li, Ping; Liu, Hongwei published the artcile< Paeoniflrin inhibits proliferation and promotes autophagy and apoptosis of sweat gland cells>, Category: esters-buliding-blocks, the main research area is skin disease paeoniflrin sweat gland cell proliferation autophagy apoptosis; autophagy; axillary bromhidrosis; hSGCs; proliferation.

Axillary bromhidrosis is sweat excreted by apocrine glands in the armpits, mouth corners and other parts. The clin. manifestation includes excessive sweating and heavy odor, leading to the growth of bacteria and skin disease. The present study investigated the mechanism underlying the effect of paeoniflrin (PF) in the treatment of bromhidrosis. PF was injected into the feet of rats, and the foot skin was dissected for histol. anal. Primary human sweat gland cells (hSGCs) were isolated from patients with bromhidrosis. After 24 h treatment with PF or 3-methyladenine, the production of reactive oxygen species (ROS), autophagy, apoptosis, proliferation and cell cycle distribution were determined PF induced nuclear pyknosis in rat SGCs. In vitro PF treatment inhibited cell proliferation with a 25% inhibitory concentration of 9.530μM. Treatment with 9.530μM PF for 24 h signifi cantly increased apoptosis, ROS production and autophagy in hSGCs. PF promoted LC3B and Beclin 1 expression, but inhibited p62, phosphorylated (p)-PI3K and p-Akt expression. 3-methyladenine treatment reversed PF-induced changes in hSGCs. PF-induced inhibition of hSGC proliferation was associated with ROS production, apoptosis, and autophagy. These fidings provide a basis for treating bromhidrosis.

Experimental and Therapeutic Medicine published new progress about Apoptosis. 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

Zhang, Xueguo; Wang, Peigen; Zhu, Liangwei; Chen, Baohua published the artcile< Rhodium(III)-catalyzed chemodivergent annulations between phenyloxazoles and diazos via C-H activation>, Application of C11H12O3, the main research area is isocoumarin preparation regioselective chemoselective; isoquinolinone preparation regioselective chemoselective; diazo compound phenyloxazole carboxylic acid cyclization rhodium catalyst.

Acid-controlled, chemodivergent and redox-neutral annulations for the synthesis of isocoumarins I (R = t-Bu, 4-bromophenyl, cyclohexyl, thiophen-2-yl, etc.; R1 = Me, Et, Ph; R2 = Me, Et, t-Bu) and isoquinolinones II (R3 = t-Bu, heptyl, furan-2-yl, etc.) have been realized via Rh(III)-catalyzed C-H activation. Diazo compounds R1C(O)C(=N2)C(O)OR2 act as a carbene precursor, and coupling occurs in one-pot process, where adipic acid and trimethylacetic acid promote chemodivergent cyclizations.

Chinese Chemical Letters published new progress about Amides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Application of C11H12O3.

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

Qian, Yu; Zhang, Liang; Sun, Yue; Tang, Yongqing; Li, Dan; Zhang, Huaishan; Yuan, Siqi; Li, Jinsong published the artcile< Differentiation and classification of Chinese Luzhou-flavor liquors with different geographical origins based on fingerprint and chemometric analysis>, Related Products of 112-63-0, the main research area is Luzhou liquor flavor compound traceability fingerprint chemometric; K-nearest neighbor model (KNN); Luzhou-flavor liquor; fingerprint; flavor compounds; multivariate analysis of variance (MANOVA).

In order to differentiate and characterize Chinese Luzhou-flavor liquor according to geog. origins, the volatile flavor compounds were analyzed for forty com. Luzhou-flavor liquor samples from Sichuan, Jiangsu, and Hubei provinces. A total of 113 volatile flavor compounds were quantified; among them, 29 flavor compounds were quantified according to the internal standard method. The differences in flavor composition among different brands of Luzhou-flavor liquor were compared. A data matrix of 64 (flavor components) × 40 (samples) was studied and interpreted using chemometric anal. The research object could be naturally clustered according to geog. origin (brand) based on the hierarchical cluster anal. (HCA), principal component anal. (PCA) and multivariate anal. of variance (MANOVA) methods. A 100% of predication ability was obtained by the application of K-nearest neighbor model (KNN) for study sample classification. The results demonstrate that the abundance of volatile flavor components in liquors combined with appropriate multivariate statistical methods could be used for the division and traceability of liquors from different geog. origins. This study can provide the basis for the identification of liquor authenticity and the traceability of liquor.

Journal of Food Science published new progress about Acids Role: BUU (Biological Use, Unclassified), BIOL (Biological Study), USES (Uses). 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

Wang, Min; Gao, Mingzhang; Miller, Kathy D.; Sledge, George W.; Zheng, Qi-Huang published the artcile< [11C]GSK2126458 and [18F]GSK2126458, the first radiosynthesis of new potential PET agents for imaging of PI3K and mTOR in cancers>, Product Details of C19H34O2, the main research area is benzenesulfonamide pyridazinylquinolinylpyridinyl carbon 11 fluorine 18 labeled preparation; PET agent labeled benzenesulfonamide pyridazinylquinolinylpyridinyl preparation.

GSK2126458 is a highly potent inhibitor of phosphoinositide 3-kinase (PI3K) and mammalian target of rapamycin (mTOR) with low picomolar to subnanomolar activity. [11C]GSK2126458 and [18F]GSK2126458, new potential PET agents for imaging of PI3K and mTOR in cancer, were first designed and synthesized in 40-50% and 20-30% decay corrected radiochem. yield, and 370-740 and 37-222 GBq/μmol specific activity at end of bombardment (EOB), resp.

Bioorganic & Medicinal Chemistry Letters published new progress about Positron emission tomography. 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

Namitharan, Kayambu; Zhu, Tingshun; Cheng, Jiajia; Zheng, Pengcheng; Li, Xiangyang; Yang, Song; Song, Bao-An; Chi, Yonggui Robin published the artcile< Metal and carbene organocatalytic relay activation of alkynes for stereoselective reactions>, Synthetic Route of 112-63-0, the main research area is alkenyl oxindole spiroazetidine oxindole stereoselective preparation TMV infection inhibitor; isatin azide alkyne ketenimine cycloaddition copper heterocyclic carbene.

Transition metal and organic catalysts have established their own domains of excellence. It has been expected that merging the two unique domains should provide complimentary or unprecedented opportunities in converting simple raw materials to functional products. N-heterocyclic carbenes alone are excellent organocatalysts. When used with transition metals such as copper, N-heterocyclic carbenes are routinely practiced as strong-coordinating ligands. Combination of an N-heterocyclic carbene and copper therefore typically leads to deactivation of either or both of the two catalysts. The direct merge of copper as a metal catalyst and N-heterocyclic carbenes as an organocatalyst for relay activation of alkynes is described. The reaction involves copper-catalyzed activation of alkynes to generate ketenimine intermediates that are subsequently activated by an N-heterocyclic carbene organocatalyst for stereoselective reactions. Each of the two catalysts (copper metal catalyst and N-heterocyclic carbene organocatalyst) accomplishes its own missions in the activation steps without quenching each other.

Nature Communications published new progress about Alkynes Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Yang, Yu-Ming; Yao, Jian-Fei; Yan, Wei; Luo, Zhuangzhu; Tang, Zhen-Yu published the artcile< Silver-Mediated Trifluoromethoxylation of (Hetero)aryldiazonium Tetrafluoroborates>, Reference of 112-63-0, the main research area is silver mediated Sandmeyer fluoromethoxylation aryl heteroaryl amine.

Here we report a silver-mediated trifluoromethoxylation of (hetero)aryldiazonium tetrafluoroborates by converting an aromatic amino group into an OCF3 group. This method, which can be considered to be a trifluoromethoxylation variation of the classic Sandmeyer-type reaction, uses readily available aryl and heteroaromatic amines as starting materials and AgOCF3 as trifluoromethoxylating reagents. The broad substrate scope and simple, mild reaction condition made this transformation a valuable method in constructing aryl-OCF3 bonds.

Organic Letters published new progress about Aromatic amines Role: RCT (Reactant), RACT (Reactant or Reagent). 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