Tag: M.W=250-300

Joannesse, Caroline; Simal, Carmen; Concellon, Carmen; Thomson, Jennifer E.; Campbell, Craig D.; Slawin, Alexandra M. Z.; Smith, Andrew D. published the artcile< Amidine catalyzed O- to C-carboxyl transfer of heterocyclic carbonate derivatives>, Application of C19H34O2, the main research area is oxazole carbonate amidine catalyst carboxyl transfer.

The structural requirements of amidines necessary to act as efficient O- to C-carboxyl transfer agents are delineated and the scope of this process outlined through its application to a range of oxazolyl, benzofuranyl and indolyl carbonates.

Organic & Biomolecular Chemistry published new progress about Transacylation. 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

Hu, Changwei; Wang, Xirui; Li, Yabin; Han, Xiaoyong; Ren, Baowen; Yin, Gangfeng published the artcile< Targeting pituitary adenomas with folate-conjugated multiple drug decorated liposomal formulations for improved antiproliferative anticancer efficacy>, Application In Synthesis of 112-63-0, the main research area is folate conjugated multiple drug liposomal formulation antiproliferative anticancer efficacy.

In this work, we synthesized folate-conjugated dual-drug loaded double liposomes which are noted for their extremely high target specificity towards pituitary adenomas. It is known that while folate receptors are almost non-existent in normal tissues, they are overexpressed in non-functional pituitary adenomas. Synthesis, characterization and in vitro studies of folate-conjugated dual-drug loaded double liposomes for targeting non-functional pituitary adenomas is the highlight of this study. The size, zeta-potential, polydispersity index, in vitro release studies, stability of the nanoformulation, cytotoxicity and cellular uptake studies have been carried out. It was noted from the results that these are highly targeted liposomal formulation as expressed by the cellular uptake studies and are just sufficiently sized to escape the clearance mechanisms of body. They were also cytocompatible and were stable even after 60 days of shelf life with negligible changes in sizes, zeta potential as well as polydispersity index. The conjugation with folate particles resulted in the high specificity of the formulation to the specific targeted tissue as seen in cellular uptake by primary cell culture of non-functional pituitary adenomas. It may safely be concluded from the results that this approach may be a promising therapy for the future which has low cytotoxicity and high-specificity.

Journal of Experimental Nanoscience published new progress about Agglomeration. 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

Lange, Heiko; Huenerbein, Robert; Wibbeling, Birgit; Froehlich, Roland; Grimme, Stefan; Hoppe, Dieter published the artcile< Comprehensive experimental and theoretical studies of configurationally labile epimeric diamine complexes of α-lithiated benzyl carbamates>, Category: esters-buliding-blocks, the main research area is carbamate stereoselective electrophilic substitution chiral oxazolidinone ligand.

Different primary benzyl-type carbamates were deprotonated by sec-butyllithium in the presence of a tert-leucinol-derived bis(oxazoline) ligand. The resulting configurationally labile epimeric complexes equilibrated and one diastereomer was strongly favored in the equilibrium After dynamic thermodn. resolution, the complexes could be trapped with different classes of electrophiles to yield highly enantioenriched secondary benzyl carbamates. The stereochem. course of the substitution reactions was elucidated. High-level quantum chem. investigations were performed and allowed a prediction of both the favored complex and the enantiomeric excess that could be expected within the reactions.

Synthesis published new progress about Carbamates 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

El-Bindary, Ashraf; Kiwaan, Hala; Shoair, Abdel Ghany; El-Ablack, Fawzia; Eessa, Ahmed published the artcile< Synthesis and characterization of hyperbranched silane-modified alkyd as a polymer for environmentally friendly low VOC polyurethane coatings>, Formula: C19H34O2, the main research area is hyperbranched silane modified alkyd resin polyurethane coating thermophys property.

The purpose of this paper is to introduce a new method for modification of alkyd resin by using 3-triethoxysilylpropyl succinic acid anhydride (TESP-SA) as the core material for low volatile organic components (VOCs) polyurethane coating applications. The structural, phys., thermal and film properties of the silane-modified (SM) alkyd were evaluated and compared with those of a silane-free alkyd resin that was prepared by a single-step method. The synthesis reaction was described in a detailed scheme and evidenced by ATR-FTIR measurements and 13C-NMR spectroscopy. As a result, environmentally friendly coatings with lower (VOC) emission are possible by using this type of alkyd polymer. The results showed that the presence of the Si atom in the final structure improved the thermal stability against the higher levels of aromatic rings in the silane-free alkyd. It was found that coatings based on SM alkyd have lower values of yellowing factor (Δa) and an increase of gloss retention percentage at different intervals of exposure to the quick UV weathering conditions. The synthesized SM alkyd resin provided a practical solution to obtain envi. friendly coatings with low VOC content, in addition to its improvement in alkyds’ overall characteristics, while still using natural resources – fatty acids – instead of totally petroleum resources. TESP-SA has not been used before in alkyd polymer modifications, and this study can help countries that are interested in using envi.-friendly coatings.

Pigment & Resin Technology published new progress about Acid number. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

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

Ono, Masahiro; Wilson, Alan; Nobrega, Jose; Westaway, David; Verhoeff, Paul; Zhuang, Zhi-Ping; Kung, Mei-Ping; Kung, Hank F. published the artcile< 11C-labeled stilbene derivatives as Aβ-aggregate-specific PET imaging agents for Alzheimer's disease>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is carbon 11 stilbene preparation PET Alzheimer amyloid plaque.

A series of stilbene derivatives as potential diagnostic imaging agents targeting amyloid plaques in Alzheimer’s disease (AD) were synthesized and evaluated. The syntheses of the stilbenes were successfully achieved by a simple Wadsworth-Emmons reaction between di-Et (4-nitrobenzyl)phosphonate and 4-methoxybenzaldehyde. 4-N,N-dimethylamino-4′-methyoxy and the corresponding 4-N-monomethylamino-, 4′-hydroxy stilbenes showed good binding affinities towards Aβ aggregates in vitro (Ki < 10 nM). The 11C labeled 4-N-methylamino-4'-hydroxystilbene, [11C]4, was prepared by 11C methylation of 4-amino-4'-hydroxystilbene. The [11C]4 displayed a moderate lipophilicity (log P = 2.36), and showed a very good brain penetration and washout from normal rat brain after an iv injection. In vitro autoradiog. of transgenic AD mouse brain sections showed a high specific labeling of β-amyloid plaques, whereas the control sections showed no binding. Taken together the data suggest that a relatively simple stilbene derivative, [11C]4, N-[11C]methylamino-4'-hydroxystilbene, may be useful as a positron emission tomog. (PET) imaging agent for mapping Aβ plaques in the brain of patients with Alzheimer's disease. Nuclear Medicine and Biology published new progress about Alzheimer disease. 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

Pauton, Mathilde; Aubert, Catherine; Bluet, Guillaume; Gruss-Leleu, Florence; Roy, Sebastien; Perrio, Cecile published the artcile< Development, Optimization, and Scope of the Radiosynthesis of 3/5-[18F]Fluoropyridines from Readily Prepared Aryl(pyridinyl) Iodonium Salts: The Importance of TEMPO and K2CO3>, Category: esters-buliding-blocks, the main research area is fluoropyridine radiopreparationarylpyridinyl iodonium salt TEMPO potassium carbonate radiolabeling.

A robust process for the radiosynthesis of 3/5-[18F]fluoropyridines was developed by radiofluorination of iodonium triflates using K18F/K2CO3/K222 complex in the presence of TEMPO. Both electronically deficient and enriched iodonium salts were readily obtained from the corresponding 3/5-iodopyridines and afforded the corresponding 3/5-[18F]fluoropyridines in 6-78% yields. The concentrations of K2CO3 and TEMPO are crucial for the radiofluorination efficiency. The process was validated using two automated systems for the 18F-radiolabeling of 2-chloro and 2-carboxamido-5-fluoropyridines carried out in 10-20% yields.

Organic Process Research & Development published new progress about Iodonium compounds, aryl Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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

Peng, Wei; Chen, Yunhui; Tumilty, Steve; Liu, Lizhou; Luo, Ling; Yin, Haiyan; Xie, Yongmei published the artcile< Paeoniflorin is a promising natural monomer for neurodegenerative diseases via modulation of Ca2+ and ROS homeostasis>, HPLC of Formula: 112-63-0, the main research area is calcium neuroprotectant neurodegenerative.

Neurodegenerative diseases (NDDs) are a range of neurol. disorders featured by neuronal degeneration and apoptosis. Cellular Calcium (Ca2+) and reactive oxygen species (ROS) dyshomeostasis are the earliest and important events in the development of NDDs and may yield promising therapeutic targets for NDDs. Paeoniflorin, a water-soluble monoterpene glucoside, is the major bioactive monomer extracted from the root of Paeonia lactiflora pall. Increasing evidence has suggested that this natural compound might be used to treat various NDDs, and its potential mol. mechanisms are related to the modulation of Ca2+/ROS homeostasis in cells. In addition, paeoniflorin accounts for more than 40% of the total glucosides of herbaceous peonies with abundant herbaceous sources. Furthermore, it has also been validated as a safe extraction in clin. pharmacol. research with a wide therapeutic window. Hence, it is rational to anticipate paeoniflorin being a promising candidate for the treatment of NDDs via regulating Ca2+/ROS dyshomeostasis.

Current Opinion in Pharmacology published new progress about Homeostasis. 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

Huang, Lichuang; Hu, Shaoqi; Shao, Meiyu; Wu, Xin; Zhang, Jida; Cao, Gang published the artcile< Combined cornus officinalis and paeonia lactiflora pall therapy alleviates rheumatoid arthritis by regulating synovial apoptosis via AMPK-mediated mitochondrial fission>, HPLC of Formula: 112-63-0, the main research area is cornus officinalis paeonia lactiflora rheumatoid arthritis synovial apoptosis; inflammation; oxidative stress; paeoniflorin; synovial tissue; ursolic acid.

Rheumatoid arthritis (RA) is a chronic autoimmune disease that leads to cartilage destruction and bone erosion. In-depth exploration of the pathogenesis of RA and the development of effective therapeutic drugs are of important clin. and social value. Herein, we explored the medicinal value of Cornus officinalis Sieb. and Paeonia lactiflora Pall. in RA treatment using a rat model of collagen-induced arthritis (CIA).We compared the therapeutic effect of Cornus officinalis and Paeonia lactiflora with that of their main active compounds, ursolic acid and paeoniflorin, resp. We demonstrated that the combination of Cornus officinalis and Paeonia lactiflora effectively inhibited the release of factors associated with oxidative stress and inflammation during RA, therein ameliorating the symptoms and suppressing the progression of RA. We further showed that the underlying mechanisms may be related to the regulation of apoptosis in synovial tissues, and we investigated the potential involvement of AMPK-mediated mitochondrial dynamics in the therapeutic action of the two drugs and their active components.

Frontiers in Pharmacology published new progress about AMP-activated protein kinase activators. 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

Kurthkoti, Krishna; Kumar, Pradeep; Sang, Pau Biak; Varshney, Umesh published the artcile< Base excision repair pathways of bacteria: new promise for an old problem>, Formula: C19H34O2, the main research area is bacteria base excision repair pathway review.

A review. Infectious diseases continue to be a major cause of human mortality. With the emergence of drug resistance, diseases that were long thought to have been curable by antibiotics are resurging. There is an urgent clin. need for newer antibiotics that target novel cellular pathways to overcome resistance to currently used therapeutics. The base excision repair (BER) pathways of the pathogen restore altered bases and safeguard the genomic integrity of the pathogen from the host′s immune response. Although the BER machinery is of paramount importance to the survival of the pathogens, its potential as a drug target is largely unexplored. In this review, we discuss the importance of BER in different pathogenic organisms and the potential of its inhibition with small mols.

Future Medicinal Chemistry published new progress about Chemotherapy Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

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

Stoyanovich, F. M.; Marakatkina, M. A. published the artcile< Formation of 3-lithio-4,5-dehydrotoluene from 4-fluoro-3,5-dibromotoluene>, Synthetic Route of 112-63-0, the main research area is lithiodehydrotoluene; benzyne lithium derivative; dehydrotoluene lithio.

Treating 4,3,5-Br(F)2C6H2Me with BuLi at -90° gave only 2,3,5-F(Br)(Me)C6H2CO2H after carbonation, but analogous reaction at -70° gave 4,3,5-Bu(HO2C)2C6H2Me via the title benzyne (I). I also gave dimers II (R = H, CO2H), and reacted with LiNPh2 to give 4,3,5-Ph2N(R)2C6H2Me (same R).

Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya published new progress about Elimination reaction. 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