Tag: M.W=200-250

Abdel-Maksoud, Mohammed S.; Ali, Eslam M. H.; Ammar, Usama M.; Mersal, Karim I.; Yoo, Kyung Ho; Oh, Chang-Hyun published the artcile< Design and synthesis of novel pyrrolo[2,3-b]pyridine derivatives targeting V600EBRAF>, Synthetic Route of 34637-22-4, the main research area is cancer anticancer BRAF inhibitors kinase inhibitor SAR; Anticancer; B-RAF inhibitors; Kinase inhibitor; Pyrrolo[2,3-b]pyridine; SAR.

Several pyrrolo[2,3-b]pyridine-based B-RAF inhibitors are well known and some of them are currently FDA approved as anticancer agents. Based on the structure of these FDA approved V600EB-RAF inhibitors, two series of pyrrolo[2,3-b]pyridine scaffold were designed and synthesized in attempt to develop new potent V600EB-RAF inhibitors. The 38 synthesized compounds were biol. evaluated for their V600EB-RAF inhibitory effect at single dose (10 μM). Compounds with high percent inhibition were tested to determine their IC50 over V600EB-RAF. Compounds 34e and 35 showed the highest inhibitory effect with IC50 values of 0.085 μM and 0.080 μM, resp. Headed for excessive biol. evaluation, the synthesized derivatives were tested over sixty diverse human cancer cell lines. Only compound 35(I) emerged as a potent cytotoxic agent against different panel of human cancer cell lines.

Bioorganic & Medicinal Chemistry published new progress about Antitumor agents. 34637-22-4 belongs to class esters-buliding-blocks, and the molecular formula is C11H15NO3, Synthetic Route of 34637-22-4.

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

Unger, Katrin; Salzmann, Paul; Masciullo, Cecilia; Cecchini, Marco; Koller, Georg; Coclite, Anna Maria published the artcile< Novel Light-Responsive Biocompatible Hydrogels Produced by Initiated Chemical Vapor Deposition>, Application of C9H3F5O2, the main research area is chem vapor deposition biocompatible hydrogel light swelling azobenzene; biocompatibility; hydrogels; iCVD; photoresponse; smart materials.

A novel multiresponsive hydrogel has been synthesized by initiated chem. vapor deposition (iCVD). Hydrogels are known for their dynamic swelling response to aqueous environments. A chem. functionalization of the hydrogel surface was performed to add other stimuli-responsive functionalities and obtain a smart material that responds to two stimuli: light irradiation and exposure to aqueous environment. Modifying the hydrogel surface with solution-based methods is often problematic because of the damages caused by the permeation of solvents in the hydrogel. This issue is completely bypassed by the use of solvent-free techniques. Cross-linked polymers of 2-hydroxyethyl methacrylate (HEMA) were functionalized with azobenzene groups, as confirmed by IR spectroscopy and XPS. Through photoisomerization of the azobenzene, the polarity within the hydrogel is modified and as a consequence the affinity to water. Light irradiation modifies the degree of swelling within thin hydrogel films from 13% before exposure to UV light to 25% after exposure. The possibility of controlling the degree and rate of swelling by light irradiation was never reported before on these time scales and can have exceptional implications for light-induced drug delivery or light-controlled microfluidic systems. The light-responsive hydrogels showed also biocompatibility, which makes them suitable for a great variety of applications as biomaterials.

ACS Applied Materials & Interfaces published new progress about Biocompatibility. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Application of C9H3F5O2.

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

Khodabakhshi, Elham; Kloeckner, Benjamin; Zentel, Rudolf; Michels, Jasper J.; Blom, Paul W. M. published the artcile< Suppression of electron trapping by quantum dot emitters using a grafted polystyrene shell>, Synthetic Route of 71195-85-2, the main research area is electron trapping quantum dot emitter grafted polystyrene shell.

A fundamental problem of adding chromophores to an organic host is that their smaller band gap leads to severe trapping of either electrons or holes, resulting in strongly unbalanced transport. We demonstrate that electron trapping by an inorganic quantum dot (QD) in a conjugated polymer host can be suppressed by functionalizing its shell with a thin insulating polystyrene layer. The polystyrene shell not only reduces trapping, but also suppresses detrapping of captured electrons, resulting in increased charging of the QDs with subsequent voltage scans, after initial charging, a red-emitting hybrid polymer:QD light-emitting diode is obtained with voltage independent electroluminescence spectrum and equal efficiency as the blue polymer host.

Materials Horizons published new progress about Band gap Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), PROC (Process). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Synthetic Route of 71195-85-2.

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

Townes, Jennifer A.; Evans, Michael A.; Queffelec, Jerome; Taylor, Steven J.; Morken, James P. published the artcile< Stereoselective Synthesis of trans β-Lactams through Iridium-Catalyzed Reductive Coupling of Imines and Acrylates>, Recommanded Product: Perfluorophenyl acrylate, the main research area is beta lactam stereoselective synthesis iridium catalyst; reductive coupling iridium catalyst beta lactam stereoselective synthesis; acrylate reductive coupling imine iridium catalyst; crystal mol structure methoxyphenylmethylnaphthylazetidinone; azetidinone stereoselective synthesis iridium catalyst; substituent effect reductive coupling imine acrylate iridium catalyst.

Iridium-catalyzed reductive coupling of acrylates and imines provides trans β-lactams with high diastereoselection. The optimal catalyst allows for the synthesis of trans β-lactams bearing aromatic, alkenyl, and alkynyl side chains. This reaction appears to proceed through a reductive Mannich addition-cyclization mechanism. Examination of substituent effects reveals a linear Hammett correlation for both the N-aryl group on the imine and the aryloxy group on the acrylate, thereby pointing to rate-determining cyclization in the reaction mechanism.

Organic Letters published new progress about Crystal structure. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Recommanded Product: Perfluorophenyl acrylate.

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

Xue, Wenwen; Mutlu, Hatice; Li, Hongjiao; Wenzel, Wolfgang; Theato, Patrick published the artcile< Structural design of pyrene-functionalized TEMPO-containing polymers for enhanced electrochemical storage performance>, Formula: C9H3F5O2, the main research area is pyrene TEMPO polymers electrochem storage performance structural design.

We demonstrate the importance of rational structural design of pyrene-functionalized radical (i.e. 2,2,6,6-tetramethyl-1-piperidinyloxy, TEMPO) copolymers for enhanced electrochem. performance by providing insightful guides for designing high-performance polymer-based electrodes for energy storage applications.

Polymer Chemistry published new progress about Composites. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Formula: C9H3F5O2.

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

De Coen, Ruben; Vanparijs, Nane; Risseeuw, Martijn D. P.; Lybaert, Lien; Louage, Benoit; De Koker, Stefaan; Kumar, Vimal; Grooten, Johan; Taylor, Leeanne; Ayres, Neil; Van Calenbergh, Serge; Nuhn, Lutz; De Geest, Bruno G. published the artcile< pH-Degradable Mannosylated Nanogels for Dendritic Cell Targeting>, Application of C9H3F5O2, the main research area is dendritic cell targeting mannose receptor mannosylated nanogel pH.

We report on the design of glycosylated nanogels via core-crosslinking of amphiphilic non-water-soluble block copolymers composed of an acetylated glycosylated block and a pentafluorophenyl (PFP) activated ester block prepared by reversible addition-fragmentation (RAFT) polymerization Self-assembly, pH-sensitive core-crosslinking, and removal of remaining PFP esters and protecting groups are achieved in one pot and yield fully hydrated sub-100 nm nanogels. Using cell subsets that exhibit high and low expression of the mannose receptor (MR) under conditions that suppress active endocytosis, we show that mannosylated but not galactosylated nanogels can efficiently target the MR that is expressed on the cell surface of primary dendritic cells (DCs). These nanogels hold promise for immunol. applications involving DCs and macrophage subsets.

Biomacromolecules published new progress about Crosslinking. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Application of C9H3F5O2.

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

Caddick, Stephen; Hamza, Daniel; Judd, Duncan B.; Reich, Melanie T.; Wadman, Sjoerd N.; Wilden, Jonathan D. published the artcile< A novel route to functionalized PFP esters via rapid intermolecular radical addition to PFP acrylate mediated by ethylpiperidinium hypophosphite (EPHP)>, Recommanded Product: Perfluorophenyl acrylate, the main research area is alkyl iodide radical addition acrylate pentafluorophenyl ethylpiperidinium hypophosphite reagent; pentafluorophenyl ester functionalized preparation.

Pentafluorophenyl (PFP) acrylate, a stable compact bifunctional scaffold undergoes rapid N-ethylpiperidinium hypophosphite (EPHP) mediated conjugate radical addition to yield a variety of active esters susceptible to further functionalization by aminolysis.

Tetrahedron Letters published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Recommanded Product: Perfluorophenyl acrylate.

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

Karmel, Caleb; Hartwig, John F. published the artcile< Mechanism of the Iridium-Catalyzed Silylation of Aromatic C-H Bonds>, Electric Literature of 2557-13-3, the main research area is arene silylation mechanism iridium catalysis.

Phenanthroline ligands and [Ir(cod)(OMe)]2 form complexes that catalyze the silylation of aromatic and aliphatic C-H bonds. However, no exptl. data on the identity of complexes related to the mechanism of this process or the mechanisms by which they react to functionalize C-H bonds have been reported. Herein, we describe our studies on the mechanism of the iridium-catalyzed silylation of aryl C-H bonds. The resting state of the catalyst is an iridium disilyl hydride complex (phenanthroline)Ir(SiMe(OTMS)2)2(H)(L), in which L varies with the arene and additives. An iridium disilyl hydride complex was isolated, characterized, and allowed to react with arenes to form aryl silanes. The kinetics of the reactions of electron-rich and electron-poor arenes showed that the rate-limiting step varies with the electronic properties of the arene. Computational studies on related iridium silyl complexes revealed that the high activity of iridium complexes with sterically encumbered phenanthroline ligands is due to a change in the number of silyl groups bound to iridium between the resting state of the catalyst containing the hindered phenanthroline and that containing less hindered phenanthroline.

Journal of the American Chemical Society published new progress about Aromatic hydrocarbons Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), PROC (Process), RACT (Reactant or Reagent), PREP (Preparation). 2557-13-3 belongs to class esters-buliding-blocks, and the molecular formula is C9H7F3O2, Electric Literature of 2557-13-3.

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

Wang, Qin; Yang, Meng; Yang, Ruisheng published the artcile< Synthesis of pentafluorophenyl acrylates>, Reference of 71195-85-2, the main research area is pentafluorophenyl acrylate preparation; acrylic acid pentafluorophenol condensation.

Pentafluorophenyl acrylates were synthesized for the first time via the condensation reaction of acrylic acids with pentafluorophenol by using N, N’- dicyclohexylcarbodiimide(DCC) as condensing agent, and good yields(74-81%) were obtained. The structures of products were confirmed by 1H NMR and ES-MS.

Huaxue Yanjiu Yu Yingyong published new progress about Aryl fluorides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Reference of 71195-85-2.

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

Chua, Giles B. H.; Roth, Peter J.; Duong, Hien T. T.; Davis, Thomas P.; Lowe, Andrew B. published the artcile< Synthesis and Thermoresponsive Solution Properties of Poly[oligo(ethylene glycol) (meth)acrylamide]s: Biocompatible PEG Analogues>, Recommanded Product: Perfluorophenyl acrylate, the main research area is methacrylamido copolymer biocompatible bioconjugated material.

A library of (meth)acrylamido (co)polymers was prepared by reacting poly(pentafluorophenyl (meth)acrylate) with α-amino, ω-methoxy functionalized di(ethylene glycol), tri(ethylene glycol), and poly(ethylene glycol) (PEG)-350, PEG-750, and PEG-5k, in combination with hexylamine or thyroxine. The resulting copolymers showed an improved solubility in water (higher or absent LCST values) and in alcs. (lower or absent UCST values) than the analogous common series of poly[oligo(ethylene glycol) Me ether (meth)acrylates]. The polyacrylamido species showed a better solubility than the corresponding polymethacrylamido derivatives of similar mol. weight with all polyacrylamides studied being water-soluble at temperatures exceeding 90.0°. Tunable thermosensitive behavior could be effected by the incorporation of the hydrophobic hexylamide comonomer. Similarly, an acrylamido backbone with grafted oligo(propylene glycol 600) amides exhibited a sharp LCST-type transition around 22.0°. The UCST-type transitions of the (meth)acrylamido homopolymers were evaluated in 2-propanol and 1-octanol and were found to increase with an increasing ethylene glycol side chain length, but were essentially independent of the alc. chain length with polymers exhibiting higher UCST transitions in 2-propanol vs. 1-octanol. Cytotoxicity tests on MRC5 fibroblast cells of the di- and tri(ethylene glycol) Me ether acrylamido homopolymers revealed no toxicity up to concentrations of 10.0 g/L. By employing mixtures of di(ethylene glycol) Me ether amine and the prohormone thyroxine (T4), water-soluble copolymers containing varying amounts of T4 could be easily synthesized. Because of enhanced solubility, low toxicity, and higher hydrolytic stability of amides vs. ester linkages, activated ester polymers in combination with amino-functionalized ethylene glycol based side chains are presented as a versatile platform for highly soluble, biocompatible, bioconjugated materials.

Macromolecules (Washington, DC, United States) published new progress about Biocompatibility. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Recommanded Product: Perfluorophenyl acrylate.

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