Tag: M.W=200-250

Specklin, Simon; Cossy, Janine published the artcile< Chemoselective Synthesis of β-Ketophosphonates Using Lithiated α-(Trimethylsilyl)methylphosphonate>, Synthetic Route of 71195-85-2, the main research area is lithiated methylsilylmethyl phosphonate preparation coupling pentafluorophenyl ester; ketophosphonate preparation.

A highly chemoselective synthesis of β-ketophosphonates from pentafluorophenyl esters and lithiated Me α-(trimethylsilyl)methylphosphonate was developed. This mild lithiated phosphonate reagent gave functionalized β-ketophosphonates, e.g., PhC(O)CH2P(O)(OMe)2, in the presence of unactivated esters with high yields. This method was compared with the standard lithiated methylphosphonate reagent.

Journal of Organic Chemistry published new progress about Esters Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (pentafluorophenyl esters). 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

Seo, Seok Kyoo; Lim, Jeewoo; Lee, Hyemin; Heo, Hyeonjun; Char, Kookheon published the artcile< Controlled spatial dispersion of CdSe tetrapod nanocrystals with amphiphilic block copolymer particles>, Name: Perfluorophenyl acrylate, the main research area is spatial dispersion CdSe tetrapod nanocrystal amphiphilic copolymer particle.

We report, for the first time, a nanoscale control of the spatial distribution of semiconducting tetrapod (TP) nanocrystals within block copolymer particles. Polystyrene (PS) block copolymer (BCP)/CdSe TP nanocrystal hybrid particles were prepared by the nanopptn. of TP/BCP mixtures into methanol. The BCPs consisted of short, polar terminal block bearing Me disulfide anchoring moiety which serves both to bind to CdSe TP surfaces as well as to drive self-assembly during nanopptn. into polar solvent systems. The resulting BCP/TP hybrid particles showed various spatial distribution and the number d. of TPs with respect to individual polymer particles depending on the d.p. of the block copolymer as well as the nature of the solvent in which nanopptn. was done.

Polymer published new progress about Acrylic polymers, fluorine-containing, block, diblock Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (styrene-containning). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Name: Perfluorophenyl acrylate.

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

Zhao, Haiwei; Herbert, Simon; Kinzel, Tom; Zhang, Wei; Shen, Qilong published the artcile< Two Ligands Transfer from Ag to Pd: En Route to (SIPr)Pd(CF2H)(X) and Its Application in One-Pot C-H Borylation/Difluoromethylation>, Application of C9H7F3O2, the main research area is fluoromethyl palladium imidazolinylidene complex preparation crystal structure fluoromethylation catalyst; crystal structure fluoromethyl palladium arylimidazolinylidene complex; mol structure fluoromethyl palladium arylimidazolinylidene complex; hetero arene borylation difluoromethylation palladium catalyst; fluoromethylated heteroarene preparation.

A process for the concurrent transfer of both the NHC ligand and difluoromethyl group from [(SIPr)Ag(CF2H)] to PdX2 (X = Cl, OAc and OPiv) for the preparation [(SIPr)Pd(CF2H)X] complexes is described. These complexes were air-stable and easily underwent transmetalation with aryl pinacol boronate/reductive elimination to generate ArCF2H in high yields. Based on this discovery, the 1st 1-pot C-H borylation and difluoromethylation for the preparation of difluoromethylated (hetero)arenes was developed.

Journal of Organic Chemistry published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 2557-13-3 belongs to class esters-buliding-blocks, and the molecular formula is C9H7F3O2, Application of C9H7F3O2.

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

Quek, Jing Yang; Roth, Peter J.; Evans, Richard A.; Davis, Thomas P.; Lowe, Andrew B. published the artcile< Reversible addition-fragmentation chain transfer synthesis of amidine-based, CO2-responsive homo and AB diblock (Co)polymers comprised of histamine and their gas-triggered self-assembly in water>, Related Products of 71195-85-2, the main research area is fluoropolymer radical polymerization RAFT hydrodynamic radius self assembly micelle.

Well-defined homopolymers of pentafluorophenyl acrylate (PFPA) and AB diblock copolymers of N,N-dimethylacrylamide (DMA) and poly(ethylene glycol) Me ether acrylate (PEGA) with PFPA were prepared by reversible addition-fragmentation chain transfer (RAFT) radical polymerization Three PFPA homopolymers of different mol. weights were reacted with the com. available amidine and guanidine species histamine (HIS) dihydrochloride and L-arginine Me ester (ARG) dihydrochloride in the presence of S-Me methanethiosulfonate to yield, quant., the corresponding amidine and guanidine-based acrylamido homopolymers. Both the HIS and ARG homopolymers are known to reversibly bind CO2 with, in the case of the former, CO2 fixation being accompanied with a switch from a hydrophobic to hydrophilic state. The RAFT synthesis of PFPA-DMA and PEGA-PFPA diblock copolymers yielded well-defined materials with a range of molar compositions These precursor materials were converted to the corresponding HIS and ARG block copolymers whose structure was confirmed using 1H NMR spectroscopy. Employing a combination of dynamic light scattering and transmission electron microscopy, we demonstrate that the DMA-HIS and PEGA-HIS diblock copolymers are able to undergo reversible and cyclable self-directed assembly in aqueous media using CO2 and N2 as the triggers between fully hydrophilic and amphiphilic (assembled) states. For example, in the case of the 54:46 DMA-HIS diblock, aggregates with hydrodynamic diameters of about 40.0 nm are readily formed from the molecularly dissolved state. © 2012 Wiley Periodicals, Inc., J Polym Sci Part A: Polym Chem, 2012.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about Fluoropolymers Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), SPN (Synthetic Preparation), PROC (Process), PREP (Preparation). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Related Products of 71195-85-2.

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

Boyer, Cyrille; Whittaker, Michael; Liu, Jinna; Davis, Thomas P. published the artcile< Synthesis and post-functionalization of well-defined star polymers via ""double"" click chemistry>, Safety of Perfluorophenyl acrylate, the main research area is functionalization perfluorophenyl acrylate star polymer click chem.

In this communication, the synthesis and the functionalization of well-defined, narrow polydispersity (PDI < 1.2) star polymers via RAFT polymerization is detailed. In this arm first approach, the initial synthesis of a poly(pentafluorophenyl acrylate) arm and subsequent crosslinking using bis-acrylamide to prepare star polymers, was achieved by RAFT polymerization These star polymers were functionalized using a variety of amino functional groups via nucleophilic substitution to yield star polymers with predesigned chem. functionality. Finally, the core of the stars was modified via thiol-ene click chem. reaction using fluorescein-o-acrylate and DyLight 633 Maleimide. PMSE Preprints published new progress about Branched polymers, star-branched Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Safety of Perfluorophenyl acrylate.

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

Njeri, Dancan K.; Pertuit, Claude J.; Ragains, Justin R. published the artcile< 1,2-cis-Selective glucosylation enabled by halogenated benzyl protecting groups>, Name: Benzyl (3-hydroxypropyl)carbamate, the main research area is disaccharide thioglycoside stereoselective glycosylation preparation uronate cholesterol; Williamson etherification stereoselective glycosylation protecting group glucosylation thioglucoside trichloroacetimidate.

We report on our initial results from a systematic effort to implement electron-withdrawing protecting groups and Lewis basic solvents/additives as an approach to 1,2-cis(α)-selective O-glucosylation. 1,2-cis-Selective O-glucosylation are reported with thioglucosides and glucosyl trichloroacetimidates and a range of acceptors. A correlation between electron-withdrawing effects and 1,2-cis selectivity has been established. This phenomenon may prove to be broadly applicable in the area of chem. O-glycosylation.

Organic & Biomolecular Chemistry published new progress about Disaccharides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 34637-22-4 belongs to class esters-buliding-blocks, and the molecular formula is C11H15NO3, Name: Benzyl (3-hydroxypropyl)carbamate.

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

Boyer, Cyrille; Davis, Thomas P. published the artcile< One- pot synthesis and biofunctionalization of glycopolymers via RAFT polymerization and thiol-ene reactions>, SDS of cas: 71195-85-2, the main research area is one pot synthesis biofunctionalization glycopolymer RAFT polymerization thiol ene.

A modification of a polymeric activated ester with sugar-amines and a simultaneous aminolysis-thiol-ene reaction involving the RAFT end-groups yield biotin functionalized glycopolymer in one-pot.

Chemical Communications (Cambridge, United Kingdom) published new progress about RAFT polymerization. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, SDS of cas: 71195-85-2.

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

Doncom, Kay E. B.; Hansell, Claire F.; Theato, Patrick; O’Reilly, Rachel K. published the artcile< Synthesis of Responsive Polymers by RAFT Polymerization, and their Self-assembly into Morphology Switching Nanostructures>, Recommanded Product: Perfluorophenyl acrylate, the main research area is pH responsive amphiphilic block copolymer self assembly.

A new diblock copolymer containing a hydrophobic block, a pH responsive block and a hydrophilic end group has been synthesized by substitution of an activated ester scaffold. The scaffold was synthesized by RAFT polymerization chemistries. The self-assembly behavior of the polymer formed has been investigated and it is shown that it undergoes a morphol. transition upon decreasing the pH below the pKa of the responsive block. It is also shown that the self-assembled structures are capable of trapping a hydrophilic dye mol. and releasing it in a controlled manner upon application of the stimulus.

PMSE Preprints published new progress about Micelles. 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

Orzolek, Brandon J.; Rahman, Anisur Md; Iovine, Peter M. published the artcile< Synthesis of Biorenewable Starch-Farnesene Amphiphilic Conjugates via Transesterification of Terpene-Derived Diels-Alder Adducts>, Recommanded Product: Perfluorophenyl acrylate, the main research area is synthesis biorenewable starch farnesene amphiphilic conjugate; transesterification terpene derived Diels Alder adduct.

Herein we describe a new class of terpene-starch esters synthesized from biorenewable building blocks. Although our work is specific to starch, we believe the synthetic methodol. can be extended to a wide range of polysaccharide substrates. In our approach, an ester functionality is first introduced to the farnesene backbone via high yielding, solvent-free Diels-Alder chem. The farnesene esters are subsequently transesterified with starch to produce a range of starch-farnesene amphiphilic biopolymers. The key transesterification reaction between farnesene and starch employs 1,5,6-triazabicyclo[4.4.0]dec-5-ene (TBD) as a guanidine base organocatalyst and is capable of producing materials with a high degree of substitution (DS). The DS can be modulated by altering the starch/farnesene feed ratio. Low DS starch-farnesene esters show surfactant-like properties while the higher DS materials were successfully solvent-cast into standalone films. Thermal and mech. tests reveal starch-farnesene esters to be robust under both solution and thermal processing conditions. Given the versatility of the synthetic method, the biorenewability of the components, and the biodegradability of the ester linkage joining the subunits, the newly produced polymer amphiphiles appear to be a promising class of new green materials.

ACS Sustainable Chemistry & Engineering published new progress about Amphiphiles. 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

Xu, Li Qun published the artcile< Ruthenium(II)-terpyridine complexes-containing glyconanoparticles for one- and two-photon excited fluorescence imaging>, Safety of Perfluorophenyl acrylate, the main research area is ruthenium terpyridine complex glyconanoparticle fluorescence cell imaging.

The synthesis of ruthenium(II)-terpyridine complexes-containing glyconanoparticles (Ru-GNPs) for one- and two-photon excited fluorescence imaging was described. Ru-GNPs were built from diblock copolymers of pentafluorophenyl acrylate (PFA) and 2-(2′,3′,4′,6′-tetra-O-acetyl-尾-D-glucosyloxy)ethyl methacryalte (AcGlcEMA), prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization The pendant reactive pentafluorophenyl ester groups were substituted and the copolymer cross-linked by the two-photon absorption (TPA) chromophore, bis[4′-(4-aminophenyl)-2,2′:6′,2”-terpyridyl]ruthenium(II) hexafluorophosphate. After deacetylation of the acetyl-protecting groups in the AcGlcEMA block, TPA nanoparticles with cross-linked ruthenium(II)-terpyridine complexes as the core and glycopolymers as the corona were obtained. The resulting Ru-GNPs exhibit good water dispersity, one-photon absorption and emission and low cytotoxicity towards KB cell line. Ru-GNPs also undergo two-photon excitation when excited in the near-IR (NIR, 720-880 nm) in water, with TPA cross-sections in the range of 0.2-22 G枚ppert-Mayer (GM, 1 GM = 10-50 cm4 s1 photon-1). Ru-GNPs are thus potentially useful as effective cellular labeling agents for one- and two-photon excited fluorescence imaging.

European Polymer Journal published new progress about Fluorescence imaging. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Safety of Perfluorophenyl acrylate.

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