Category: esters-buliding-blocks

Zhang, Dehui; Zheng, Hongchao; Wang, Xiaodong published the artcile< General and cost-effective synthesis of 1-heteroaryl/arylcycloalkylamines and their broad applications>, SDS of cas: 112-63-0, the main research area is heteroaryl aryl cycloalkylamine preparation.

A general and cost-effective route has been developed to synthesize 1-heteroaryl-substituted cycloalkylamines from readily available heteroarylacetate in good yields. This synthesis features a LHMDS promoted cyclization and one-pot hydrolysis/Curtius rearrangement. This route can be easily carried out on multi-gram scale and be also used to prepare 1-aryl-substituted cycloalkyl/cycloheteroalkylamines. 1-Heteroaryl/aryl-substituted cycloalkyl/cycloheteroalkylamines are versatile building blocks and their applications in organic and medicinal chem. have been demonstrated in the synthesis of morpholine and N-methylpiperazine analogs and a known Rho kinase inhibitor compound

Tetrahedron published new progress about Alicyclic amines 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

Yousaf, Zeshan; Morrison, Neil F.; Parnell, William J. published the artcile< Tensile properties of all-polymeric syntactic foam composites: Experimental characterization and mathematical modelling>, Electric Literature of 112-63-0, the main research area is polyurethane syntactic foam composite math modeling tensile property.

All-polymer syntactic foams are studied under large strain cyclic and monotonic tensile loading in order to reveal their tensile stress-strain behavior, recoverability, tensile strength, and elongation at break. The syntactic foam under study here consists of hollow thermoplastic microspheres (HTMs) of two distinct grades (551 and 920), with distributions of mean-wall thicknesses and diameters, embedded inside a polyurethane matrix in various volume fractions. Cyclic loading-unloading curves are recorded, revealing the level of viscoelasticity exhibited by the materials (which becomes a stronger effect with increasing volume fractions of HTMs) and indicating the level of repeatability of loading under large strain. Samples are also subjected to monotonic tensile loading in order to study their elongation at break. Higher volume fractions of HTMs increase the stiffness of the material and while it is observed that the materials are highly elastic over a wide range of tensile strains, damage arises at lower levels of strain for more highly filled materials. The HTM syntactic foams thus exhibit lower breaking strains compared to the neat matrix, which is attributed to matrix-microsphere interfacial debonding. Furthermore, by employing optimization techniques, linear elastic properties of the microspheres and an average shell thickness of the 551 grade are inferred by comparing exptl. results to predictions from the Generalized Self-Consistent Method, incorporating polydispersity data on the size distribution of the microspheres. These results complement previous work which involved direct exptl. measurements of the 920 grade shell thickness. Results also indicate that the characterization of microsphere properties is not critically dependent on access to high resolution microsphere diameter distribution data, provided that an accurate representative mean diameter is known. Finally, the thermal degradation of the samples is studied by using thermogravimetric anal. (TGA) which reveals that HTMs can be added to a polyurethane matrix without significantly affecting the thermal stability of the matrix material.

Composites, Part B: Engineering published new progress about Bulk modulus. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Shang, Ya-Jing; Qian, Yi-Ping; Liu, Xiao-Da; Dai, Fang; Shang, Xian-Ling; Jia, Wen-Qiang; Liu, Qiang; Fang, Jian-Guo; Zhou, Bo published the artcile< Radical-Scavenging Activity and Mechanism of Resveratrol-Oriented Analogues: Influence of the Solvent, Radical, and Substitution>, Related Products of 112-63-0, the main research area is radical scavenging resveratrol oriented analog solvent substitution.

Resveratrol (3,5,4′-trihydroxy-trans-stilbene, 3,5,4′-THS) is a known natural antioxidant and cancer chemopreventive agent that has attracted much interest in the past decade. To find a more active antioxidant and study the antioxidative mechanism with resveratrol as the lead compound, the authors synthesized 3,5-dihydroxy-trans-stilbene (3,5-DHS), 4-hydroxy-trans-stilbene (4-HS) 3,4-dihydroxy-trans-stilbene (3,4-DHS), 4,4′-dihydroxy-trans-stilbene (4,4′-DHS), 4-hydroxy-3-methoxy-trans-stilbene (3-MeO-4-HS), 4-hydroxy-4′-methoxy-trans-stilbene (4′-MeO-4-HS), 4-hydroxy-4′-methyl-trans-stilbene (4′-Me-4-HS), 4-hydroxy-4′-nitro-trans-stilbene (4′-NO2-4-HS), and 4-hydroxy-4′-trifluoromethyl-trans-stilbene (4′-CF3-4-HS). The radical-scavenging activity and detailed mechanism of resveratrol and its analogs (ArOHs) were studied by the reaction kinetics with galvinoxyl (GO·) and 2,2-diphenyl-1-picrylhydrazyl (DPPH·) radicals in ethanol and Et acetate at 25 °C, using UV-visible spectroscopy. The reaction rates increase with increasing the electron-rich environment in the mols., and the compound bearing o-dihydroxyl groups (3,4-DHS) is the most reactive one among the examined resveratrol analogs. The effect of added acetic acid on the measured rate constant for GO·-scavenging reaction reveals that in ethanol that supports ionization solvent besides hydrogen atom transfer (HAT), the kinetics of the process is partially governed by sequential proton loss electron transfer (SPLET). In contrast to GO·, DPPH· has a relatively high reduction potential and therefore enhances the proportion of SPLET in ethanol. The relatively low rate constants for the reactions of ArOHs with GO· or DPPH· in Et acetate compared with the rate constants in ethanol prove that in Et acetate these reactions occur primarily by the HAT mechanism. The contribution of SPLET and HAT mechanism depends on the ability of the solvent to ionize ArOH and the reduction potential of the free radical involved. Also, the fate of the ArOH-derived radicals, i.e., the phenoxyl radicals, was studied by the oxidative product anal. of ArOHs and GO· in ethanol. The major products were dihydrofuran dimers in the case of resveratrol, 4,4′-DHS, and 4-HS and a dioxane-like dimer in the case of 3,4-DHS. It is suggested from the oxidative products of these ArOHs that the hydroxyl group at the 4-position is much easier to subject to oxidation than other hydroxyl groups, and the dioxane-like dimer is formed via an o-quinone intermediate.

Journal of Organic Chemistry published new progress about Antioxidants. 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

Xu, Meng; Chigumira, Tafadzwa; Chen, Ziheng; Tones, Jason; Zhao, Rongwei; Dahl, Kris Noel; Chenoweth, David M.; Zhang, Huaiying published the artcile< CRISPR Cas13-based tools to track and manipulate endogenous telomeric repeat-containing RNAs in live cells>, Application In Synthesis of 112-63-0, the main research area is U2OS cell TERRA telomere CRISPR Cas13; CRISPR Cas13; RNA imaging; TERRA; chemical dimerizer; lncRNA; telomere.

TERRA, TElomeric Repeat-containing RNA, is a long non-coding RNA transcribed from telomeres. Emerging evidence indicates that TERRA regulates telomere maintenance and chromosome end protection in normal and cancerous cells. However, the mechanism of how TERRA contributes to telomere functions is still unclear, partially owing to the shortage of approaches to track and manipulate endogenous TERRA mols. in live cells. Here, we developed a method to visualize TERRA in live cells via a combination of CRISPR Cas13 RNA labeling and SunTag technol. Single-particle tracking reveals that TERRA foci undergo anomalous diffusion in a manner that depends on the timescale and telomeric localization. Furthermore, we used a chem.-induced protein dimerization system to manipulate TERRA subcellular localization in live cells. Overall, our approaches to monitor and control TERRA locations in live cells provide powerful tools to better understand its roles in telomere maintenance and genomic integrity.

Frontiers in Molecular Biosciences published new progress about Animal gene Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (TERRA). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application In Synthesis of 112-63-0.

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

Prasad, Girija; Hanna, Patrick E.; Noland, Wayland E.; Venkatraman, Shankar published the artcile< 18-Crown-6 as a catalyst in the dialkylation of o-nitrophenacyl derivatives>, Related Products of 30095-98-8, the main research area is alkylation nitrophenacyl compound 18crown6 catalyst; catalyst crown ether dialkylation nitrophenacyl.

The dialkylation of o-nitrophenacyl ketones, o-nitrophenylacetate esters, and o-nitrophenylacetonitrile with alkyl halides and potassium tert-butoxide proceeds in good yields with 18-crown-6 as catalyst.

Journal of Organic Chemistry published new progress about Alkylation. 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Related Products of 30095-98-8.

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

Ramalingam, S. K.; Samath, S. A. published the artcile< Reactions of β-diketonates with pyridinium bromide perbromide>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is bromination pyridinium tribromide metal coordinated diketone; transition metal diketone ketoester Schiff bromination; aluminum diketone ketoester Schiff base bromination; ketoester metal complex bromination.

Reactions of PyHBr3 (Py = pyridine) with some metal β-diketones/β-ketoesters/their Schiff bases in EtOH yield various end products depending on the pH of the reaction. Under acidic conditions, metal chelates (MII = Cu, Co, Ni, Mn, Zn,; MVI = UO2) undergo diketone ring cleavage to give solid compounds of the type [PyH}2{MBr4]. Metal chelates (MIII = Co, Cr, Al, Fe, Mn; MIV = Th) yield the usual γ-bromo products but those derived from the Schiff base chelates of M(II) are unstable if left in solution In alk. medium, γ-bromo chelates are obtained in all the cases.

Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical & Analytical 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

Hidajat, Marcel Jonathan; Riaz, Asim; Park, Jaeyong; Insyani, Rizki; Verma, Deepak; Kim, Jaehoon published the artcile< Depolymerization of concentrated sulfuric acid hydrolysis lignin to high-yield aromatic monomers in basic sub- and supercritical fluids>, Related Products of 112-63-0, the main research area is depolymerization sulfuric acid hydrolysis lignin aromatic monomer supercritical fluid; bio oil manufacture lignin depolymerization sulfuric acid hydrolysis.

Conversion of lignin into high-yield aromatic monomers is investigated using base-catalyzed depolymerization (BCD) in sub- and supercritical fluids. The effects of the base catalysts (NaOH, KOH, and Na2CO3), reaction media (subcritical water (subH2O) and supercritical methanol (scMeOH)), and type of lignin (concentrated sulfuric acid hydrolysis lignin (CSAHL) and Kraft lignin (KL)) on the lignin conversion and product yields (gas, bio-oil, solid residue, and aromatic monomers) are explored to understand dominant factors determining the aromatic monomer yield. Treatment of KL lignin in subH2O-NaOH at 330 °C for 30 min results in a high monomeric yield of 21.5 wt%. Under identical reaction conditions, a low amount of CSAHL (17.9 wt%) is converted to aromatic monomers; the low yield results from the resistant nature of CSAHL. In scMeOH, the monomeric yields are much lower (3.3-7.8 wt%), and the solid residue yields are much higher (about 26-31 wt%) than those obtained from subH2O (monomeric yields, 6.2-17.9 wt%; solid-residue yields, 16-17 wt%). The most abundant monomers produced in the subH2O-basic media are catechols and their alkylated and alkoxylated derivatives, while those produced in the scMeOH-basic media are methoxylated benzene and toluene species because of the unique O-alkylation ability of scMeOH.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Acids Role: IMF (Industrial Manufacture), PREP (Preparation). 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