Tag: M.W=250-300

Zhao, Yongkai; Shou, Tao; Fu, Siwei; Qin, Xuan; Hu, Shikai; Zhao, Xiuying; Zhang, Liqun published the artcile< Controllable Design and Preparation of Hydroxyl-Terminated Solution-Polymerized Styrene Butadiene for Polyurethane Elastomers with High-Damping Properties>, Computed Properties of 112-63-0, the main research area is hydroxyl terminated styrene butadiene polymerized polyurethane elastomer damping property; anionic polymerization; high damping; hydroxyl-terminated styrene-butadiene rubbers; microphase separation; polyurethane.

Vibration and noise are ubiquitous in social life, which severely damage machinery and adversely affect human health. Thus, the development of materials with high-damping performance is of great importance. Rubbers are typically used as damping materials because of their unique viscoelasticity. However, they do not satisfy the requirements of different applications with various working conditions. In this study, the advantages of the high loss factor of styrene butadiene rubber (SBR) are combined with the strong designability of polyurethane. Hydroxyl-terminated solution-polymerized styrene butadiene rubbers (HTSSBRs) with different structures are prepared using anionic polymerization HTSSBRs are then used as the soft segment during the synthesis of temperature-tunable high-damping performance polyurethanes (HTSSBR-polyurethanes (PUs)). The prepared HTSSBR-PUs with different structures exhibit excellent loss performance, a maximum loss factor (tan 未max) of above 1.60, and an effective damping performance over a wide temperature range compared to traditional SBR and polyurethane. Therefore, this work offers an effective method for the design of damping materials with adjustable properties.

Macromolecular Rapid Communications published new progress about Complex modulus, tan � 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

Miller, Siennah R.; Hau, Raymond K.; Jilek, Joseph L.; Morales, Mark N.; Wright, Stephen H.; Cherrington, Nathan J. published the artcile< Nucleoside reverse transcriptase inhibitor interaction with human equilibrative nucleoside transporters 1 and 2>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is equilibrative nucleoside transporters 1 2 reverse transcriptase inhibitor.

HeLa S3 cells express ENT1 and ENT2 and were used to compare relative interactions of these transporters with selected NRTIs. Inhibition of [3H]uridine uptake by NBMPR was biphasic, with IC50 values of 11.3 nM for ENT1 and 9.6渭M for ENT2. Uptake measured with 100 nM NBMPR represented ENT2-mediated transport; subtracting that from total uptake represented ENT1-mediated transport. The kinetics of ENT1- and ENT2-mediated [3H]uridine uptake revealed no difference in Jmax (16.53 and 30.40 pmol路cm-2路min-1) and an eight-fold difference in Kt (13.6 and 108.9渭M). The resulting five-fold difference in intrinsic clearance (Jmax/Kt) for ENT1- and ENT2 transport accounted for observed inhibition of [3H]uridine uptake by 100 nM NBMPR. Millimolar concentrations of the NRTIs emtricitabine, didanosine, lamivudine, stavudine, tenofovir disoproxil and zalcitabine had no effect on ENT transport activity, whereas abacavir, entecavir and zidovudine inhibited both transporters with IC50 values of ~200渭M, 2.5 mM and 2 mM, resp. Using LC-MS/MS and [3H] compounds, the data suggest that entecavir is an ENT substrate, abacavir is an ENT inhibitor, and zidovudine uptake is carrier-mediated, although not an ENT substrate. These data show that HeLa S3 cells can be used to explore complex transporter selectivity and are an adequate model for studying ENTs present at the BTB.

Drug Metabolism & Disposition published new progress about Equilibrative nucleoside transporters, ENT1/SLC29A1 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

Aoyama, Tadashi; Takido, Toshio; Kodomari, Mitsuo published the artcile< One-pot synthesis of è ?bromoesters from aromatic aldehydes and diols using pyridinium hydrobromide perbromide>, Category: esters-buliding-blocks, the main research area is bromo ester preparation; aromatic aldehyde reaction diol pyridinium hydrobromide perbromide.

A simple and efficient one-pot procedure has been developed for the synthesis of è ?bromoesters from aromatic aldehydes and diols in the presence of pyridinium hydrobromide perbromide (PHPB) and triethoxymethane in which aldehyde reacts first with diol and the product, cyclic acetal, reacts with PHPB to give the final product, è ?bromoesters. E.g., reaction of HOCH2CH2OH and 4-MeC6H4CHO gave 97% 4-MeC6H4CO2CH2CH2Br.

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

Byun, Jun-Kyu; Lee, Seunghyeong; Kang, Gil Won; Lee, Yu Rim; Park, Soo Young; Song, Im-Sook; Yun, Jae Won; Lee, Jaebon; Choi, Yeon-Kyung; Park, Keun-Gyu published the artcile< Macropinocytosis is an alternative pathway of cysteine acquisition and mitigates sorafenib-induced ferroptosis in hepatocellular carcinoma>, Recommanded Product: Ethyl 3-amino-4-(cyclohexylamino)benzoate, the main research area is sorafenib anticancer cysteine acquisition macropinocytosis ferroptosis hepatocellular carcinoma; Ferroptosis; Hepatocellular carcinoma; Macropinocytosis; Sorafenib; Sorafenib resistance.

Macropinocytosis, an important nutrient-scavenging pathway in certain cancer cells, allows cells to compensate for intracellular amino acid deficiency under nutrient-poor conditions. Ferroptosis caused by cysteine depletion plays a pivotal role in sorafenib responses during hepatocellular carcinoma (HCC) therapy. However, it is not known whether macropinocytosis functions as an alternative pathway to acquire cysteine in sorafenib-treated HCC, and whether it subsequently mitigates sorafenib-induced ferroptosis. This study aimed to investigate whether sorafenib drives macropinocytosis induction, and how macropinocytosis confers ferroptosis resistance on HCC cells. Macropinocytosis, both in HCC cells and HCC tissues, was evaluated by measuring TMR-dextran uptake or lysosomal degradation of DQ-BSA, and ferroptosis was evaluated via C11-BODIPY fluorescence and 4-HNE staining. Sorafenib-induced ferroptosis and macropinocytosis were validated in tumor tissues taken from HCC patients who underwent ultrasound-guided needle biopsy. Sorafenib increased macropinocytosis in human HCC specimens and xenografted HCC tissues. Sorafenib-induced mitochondrial dysfunction was responsible for activation of PI3K-RAC1-PAK1 signaling, and amplified macropinocytosis in HCC. Importantly, macropinocytosis prevented sorafenib-induced ferroptosis by replenishing intracellular cysteine that was depleted by sorafenib treatment; this rendered HCC cells resistant to sorafenib. Finally, inhibition of macropinocytosis by amiloride markedly enhanced the anti-tumor effect of sorafenib, and sensitized resistant tumors to sorafenib. In summary, sorafenib induced macropinocytosis, which conferred drug resistance by mitigating sorafenib-induced ferroptosis. Thus, targeting macropinocytosis is a promising therapeutic strategy to facilitate ferroptosis-based therapy for HCC.

Journal of Experimental & Clinical Cancer Research published new progress about Cell division control protein 42 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, Recommanded Product: Ethyl 3-amino-4-(cyclohexylamino)benzoate.

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

Chen, Dong-Meng published the artcile< Variation of graphene Raman G-peak splitting with strain>, Electric Literature of 112-63-0, the main research area is graphene polyaromatic mol Raman peak splitting strain.

Variation of graphene Raman G peak splitting due to uniaxial strain and absorption of polyaromatic moleculars on both sides are studied by fifth-nearest neighbor force-constant model. The calculation results show that symmetry lowering is responsible for the G peak splitting, where G peak splits into G+ and G- peaks by lifting the energy degeneracy of inplane longitudinal and transverse optical phonons at �point. Under uniaxial strain, the elongation of C-C bonds reduces the force-constant and softens the in-plane optical phonons which induce red shifts of both G+ and G- peaks. The different strains produced by polyaromatic mols. along its long and short edges lead to red shift and blue shift of the two in-plane optical phonons relevant to G- and G+ peaks, which gives a plausible explanation to the different G peak splitting of the recent Raman experiment on graphene with uniaxial strain and graphene sandwiched by the polyaromatic mols.

Wuli Xuebao published new progress about Raman spectra. 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

Pang, Jiayin; Kim, Hee Sun; Boitt, Gustavo; Ryan, Megan H.; Wen, Zhihui; Lambers, Hans; Sharma, Manish; Mickan, Bede; Gadot, Gautier; Siddique, Kadambot H. M. published the artcile< Root diameter decreases and rhizosheath carboxylates and acid phosphatases increase in chickpea during plant development>, SDS of cas: 112-63-0, the main research area is chickpea carboxylate acid phosphatase rhizosheath plant development.

This study investigated whether root traits at the seedling stage are maintained at the flowering stage in two chickpea (Cicer arietinum) genotypes with contrasting root morphol. and physiol.; and whether the genotype with greater rhizosheath carboxylates mobilises more poorly-available phosphorus (P) pools to increase shoot P at flowering/podding and seed yield at maturity. Two chickpea genotypes were grown in a low P soil with or without P addition (0 and 40渭g P g-1 soil as KH2PO4) under controlled glasshouse conditions and harvested at seedling, flowering/podding, physiol. maturity. At the seedling and flowering/podding stages, ICC2884 had thinner roots and greater root mass ratio, specific root length and rhizosheath carboxylates per root dry weight (DW) than ICC456. Both genotypes had smaller root diameter, higher carboxylates and acid phosphatase activity in rhizosheath soil at flowering/podding than at seedling. In the rhizosheath soil of both genotypes, NaHCO3-Pi concentration was depleted under P0 only; under both P0 and P40, NaHCO3-Po concentration increased while NaOH-Pi and NaOH-Po concentrations decreased at the seedling stage but accumulated at the flowering/podding stage, relative to the bulk soil. ICC2884 did not mobilise more poorly available soil P or acquire more P at the seedling or flowering/podding stages, or produce higher seed yields than ICC456. ICC2884 and ICC456 maintained the difference in root morphol. and physiol. characteristics from the seedling stage to the flowering/podding stage. The genotype with greater rhizosheath carboxylates (root DW basis) did not produce higher yield than genotype with less rhizosheath carboxylates.

Plant and Soil published new progress about Chickpea. 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

Mehta, Goverdhan; Dutta, Prabhir K.; Pandey, Paras N. published the artcile< Novel transannular cyclization of the tricyclo[4.2.2.02,5]deca-3,7-diene ring system>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is transannular cyclization tricyclodecadiene.

The addition of Br, C5H5N+ HBr3-, PhI+ Cl2-, ICl, INO3, and m-ClC6H4CO2OH to 9,10-dicarbomethoxytricyclo[4.2.2.02,5]deca-3,7-diene (I) was studied. Structures of the cyclized products were deduced from spectral data. The results of addition of bromine to I are at variance with those reported in the literature. Acid-catalyzed rearrangement of the epoxide derived from I was also reported.

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry published new progress about Cyclization. 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

Kumar, Manoj; Gurawa, Aakanksha; Kumar, Nitin; Kashyap, Sudhir published the artcile< Bismuth-Catalyzed Stereoselective 2-Deoxyglycosylation of Disarmed/Armed Glycal Donors>, Product Details of C12H16O7, the main research area is amino acid glycoside oligosaccharide preparation stereoselective glycosylation catalyst trifluoromethylation.

Bi(OTf)3 promoted direct and highly stereoselective glycosylation of “”disarmed”” and “”armed”” glycals to synthesize 2-deoxyglycosides has been reported. The tunable and solvent-controlled chemoselective activation of deactivated glycal donors distinguishing the competitive Ferrier and 1,2-addition pathways was discovered to improve substrate scope. The practical versatility of the method has been amply demonstrated with the oligosaccharide syntheses and 2-deoxyglycosylation of high-value natural products and drugs.

Organic Letters published new progress about Amino acids Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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

Ishida, Atsushi; Shichi, Hiroki; Fukuoka, Hidenori; Inoshita, Naoko; Ogawa, Wataru; Yamada, Shozo published the artcile< Efficacy of temozolomide combined with capecitabine (CAPTEM) on refractory prolactinomas as assessed using an ex vivo 3D spheroid assay>, HPLC of Formula: 112-63-0, the main research area is refractory prolactinoma temozolomide capecitabine prolactin cell viability; 3D spheroid culture; CAPTEM; Capecitabine; MGMT; Refractory prolactinoma; Temozolomide.

Purpose: Refractory prolactinomas resistant to dopamine agonists (DAs) pose a clin. challenge. Temozolomide (TMZ) is a recommended treatment option, but its effects are difficult to predict, and the alternatives are limited. Recent reports suggested that TMZ combined with capecitabine (CAPTEM) can be effective for the treatment of aggressive pituitary tumors. This study sought to evaluate the effect of TMZ in an ex vivo three-dimensional (3D) spheroid culture assay and determine if this assay could be used to predict the therapeutic effect of CAPTEM in actual refractory prolactinomas. Methods: Surgically resected tumor tissues from two patients with refractory prolactinoma were cultured as 3D spheroids. The effects of TMZ were assessed based on its suppression of cell viability and reduction of prolactin (PRL) levels. Results: In Case 1, the 3D culture assay showed no effect of TMZ on cell viability or PRL suppression. Clin., TMZ treatment did not reduce PRL levels (8870�274 ng/mL) and the tumor progression. However, CAPTEM partially reduced PRL levels (9070�046 ng/mL) and suppressed the tumor growth. In Case 2, TMZ in the 3D culture assay showed a 50redn. of cell viability and 40redn. of PRL levels. Clin., CAPTEM was highly effective, with a considerable reduction in PRL level (17,500�10 ng/mL), and MRI showed almost no residual tumor. Conclusions: This is the first report to describe the effects of CAPTEM treatment on refractory prolactinomas. The ex vivo 3D spheroid culture assay reliably predicted TMZ sensitivity and informed the selection between TMZ or CAPTEM treatment for refractory prolactinomas.

Pituitary published new progress about Antitumor agents. 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

Graf, Roderich published the artcile< 2-Methyl-5-aminopyridine and its derivatives>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is .

Details are given of the preparation of aldehydocollidine (Ger. pat. 349,184) and its oxidation to 6-methylnicotinic acid (1). The HCl salt of I and SOCl2 do not react below the b. p. of the SOCl2; at the b. p. there results an intensely green-reddish brown dye; MeOH-HCl gives the Me ester of I, m. 32� the ester seps. on warming the aqueous solution as an oil; Et ester, b15 130� b. 222-4�(slight decomposition); amide, m. 194� hydrazide (II), m. 134-5�(benzal derivative, m. 184-5� o-chlorobenzal derivative, m. 183-4� vanillal derivative, m. 245-60�; II and KNO: in N HCl give the azide (III), m. 44-5� and sec-bis(6-metkylnicotinic acid) hydraside, m. 247-50� III and PhNH2 in Et2O give the anilide of I, m. 134-7� 2-methyl-5-aminopyridine and III give N-(6-methyl-3-pyridoyl)-6-methyl-3-aminopyridine, m. 275-7�(decomposition). Boiling III in absolute EtOH gives 2-methyl-5-carbethoxyaminopyridine, m. 132-3� while boiling H2O gives sym-bis(2-methyl-5-pyridoyl)urea, m. 285-8�(decomposition); heating the latter with concentrated HCl at 130�for 10 hrs. gives 2-methyl-5-aminopyridine (IV), m. 95-6� heating III in dilute AcOH gives only a poor yield of IV; the amide (40 g.) and NaOCl give 18 g. VI. The di-HCl salt of IV m. 215-8�(decomposition); Ac derivative, m. 122-3� Bz derivative, m. 110-1� IV, through the diazo solution, gives the 5-Cl derivative, b. 163� m. 19� oxidation gives 5-chloropyridine-2-carboxylic acid, crystals with 1 mol. H2O, m. 169-70� chloride, m. 94� Me ester, m. 85-7� Ph ester, m. 92� amide, m. 200-1� 2-Methyl-5-bromopyridine, m. 32� 5-bromopyridine-2-carboxylic acid, m. 175� 2-Methyl-5-iodopyridine, m. 48-9� HI salt, m. 235-8� 5-iodopyridine-2-carboxylic acid, m. 188-90� 2-Methyl-5-hydroxypyridine, m. 165-7�

Journal fuer Praktische Chemie (Leipzig) published new progress about History. 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