Tag: M.W=150-200

Li, Wenmu; Chen, Guang; Zhang, Suobo; Wang, He; Yan, Donghang published the artcile< Synthesis and properties of novel regioirregular polyimides from easily synthesized asymmetrical dichlorophthalimide monomers>, Application of C8H3ClO3, the main research area is asym dichlorophthalimide monomer regioirregular polyimide.

New asym. aromatic dichlorophthalimide monomers containing pendant groups (trifluoromethyl or methyl) were conveniently prepared from inexpensive and com. available compounds With these monomers, a new class of soluble polyimides with a regioirregular structure within the polymer backbone was obtained by the Ni(0)-catalyzed polymerization method. The structures of the polymers were confirmed by various spectroscopic techniques. The polyimides displayed better solubility and higher thermal stability than the corresponding regular polyimides. In addition, fluorinated polyimides in this study had low dielec. constants ranging from 2.52 to 2.78, low moisture absorptions of less than 0.59%, and low thermal expansion coefficients between 10.6 and 19.7 ppm/°C. The oxygen permeability coefficients and permeability selectivity of oxygen to nitrogen of the films were in the ranges of 2.99-4.20 barrer and 5.55-7.50, resp. We have demonstrated that the synthetic pathway for polyimides provides a successful approach to increasing the solubility and processability of polyimides without sacrificing their thermal stability.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about Dielectric constant. 118-45-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H3ClO3, Application of C8H3ClO3.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Khan, Nazish; Pradhan, Alka published the artcile< Synthesis and characterization of some unique oxazolone analogs>, COA of Formula: C9H7ClO, the main research area is oxazolone preparation; phenylpropenoyl amino acetic acid aldehyde condensation.

A series of oxazolone derivatives have been prepared by the condensation of {[(2E)-3-phenylprop-2-enoyl]amino}acetic acid with different aldehydes in presence of ethanol, acetic anhydride and sodium acetate.

European Journal of Biomedical and Pharmaceutical Sciences published new progress about Aryl aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 17082-09-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H7ClO, COA of Formula: C9H7ClO.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Cazotti, Jaime C.; Fritz, Alexander T.; Garcia-Valdez, Omar; Smeets, Niels M. B.; Dube, Marc A.; Cunningham, Michael F. published the artcile< Graft Modification of Starch Nanoparticles Using Nitroxide-Mediated Polymerization and the ""Grafting to"" Approach>, HPLC of Formula: 1592-20-7, the main research area is graft starch nanoparticle nitroxide polymerization Grafting.

Starch nanoparticles (SNP) were modified with synthetic polymers using the “”grafting to”” approach and nitroxide-mediated polymerization SG1-capped poly(Me methacrylate-co-styrene) (P(MMA-co-S)) copolymers with low dispersity and high degree of livingness were first synthesized in bulk. These macroalkoxyamines were then grafted to vinyl benzyl-functionalized SNP to obtain biosynthetic hybrids. The grafted materials, SNP-g-P(MMA-co-S), were characterized by 1H NMR, FTIR, TGA, and elemental anal. The total amount of grafted polymer and the grafting efficiency were evaluated for different mol. weights (5870-12150 g·mol-1) of the grafted polymer, the polymer addition approach (batch or semibatch) and the initial polymer loading (2.5, 5, or 10 g polymer/g SNP). The proposed approach presented in this work to graft modify SNP allows for a precise surface modification of the nanoparticles, while permitting that the final properties of the resulting biohybrid to be tunable according to the choice of polymer grafted.

Biomacromolecules published new progress about Coating materials. 1592-20-7 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H9Cl, HPLC of Formula: 1592-20-7.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Lambert, Romain; Wirotius, Anne-Laure; Vignolle, Joan; Taton, Daniel published the artcile< C-C couplings in water by micellar catalysis at low loadings from a recyclable polymer-supported Pd(II)-NHC nanocatalyst>, COA of Formula: C9H9Cl, the main research area is polymer supported palladium nanocatalyst micellar catalysis coupling reaction.

A specifically devised amphiphilic star-like polymer-supported Pd(II)-NHC2 unit (NHC = N-heterocyclic carbene) enables highly efficient micellar catalysis in pure water. An amphiphilic block copolymer carrying benzimidazolium moieties randomly distributed along the hydrophobic block is precisely synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization Addition of Pd(OAc)2 followed by nanopptn. in water drives the metal-ligand coordination core-crosslinking reaction and the segregation of Pd-NHC2 units in the hydrophobic core to form robust polymeric micelles. This approach confers multiple advantages to both the Suzuki-Miyaura and Heck cross-coupling reactions, including robustness, almost no metal leaching, low catalyst loadings (0.1 mol% rel. to the substrate), easy recycling, very broad substrate scope and exceptionally high catalytic activity in water.

Polymer Chemistry published new progress about Heck reaction catalysts. 1592-20-7 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H9Cl, COA of Formula: C9H9Cl.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Ghosh, Swarbhanu; Ghosh, Aniruddha; Riyajuddin, Sk.; Sarkar, Somnath; Chowdhury, Arpita Hazra; Ghosh, Kaushik; Islam, Sk. Manirul published the artcile< Silver Nanoparticles Architectured HMP as a Recyclable Catalyst for Tetramic Acid and Propiolic Acid Synthesis through CO2 Capture at Atmospheric Pressure>, SDS of cas: 3240-10-6, the main research area is recyclable silver nanoparticle architecture hypercrosslinked microporous polymer preparation; propargylic amine preparation carbon dioxide silver catalyst green chem; tetramic acid preparation; phenylacetylene carbon dioxide silver catalyst green chem; phenylpropiolic acid preparation.

The synthesis of hypercrosslinked microporous polymer (HMP-2) was assembled significant concentration by the virtue of its adjustable porosity, operative design and absolutely ordering structure. This perfectly structured Ag NPs supported carbocatalyst (Ag-HMP-2) was been synthesized by Friedel-Crafts alkylation between 4,4′-Bis(bromomethyl)-1,1′-biphenyl and carbazole over anhydrous iron(III)chloride catalysis followed by the appending of the silver nanoparticles (Ag NPs) onto the material. The silver nanoparticle was decorated over the HMP-2 to prepare the corresponding catalyst (Ag-HMP-2). The characterization of the newly produced material was conducted by N2 adsorption/desorption studies, XPS, FE-SEM, transmission electron microscopy (TEM) and Powder X-ray diffraction (PXRD) methods. This microporous catalyst was spectacular activities for the production of tetramic acids from various types of propargylic amine derivatives at 60C under atm. carbon dioxide pressure. Parallel attempt on fixation of CO2 was executed over terminal alkynes to synthesize propiolic acids under 1 atm pressure. The catalyst (Ag-HMP-2) exhibited sufficient recycling ability for the generation of tetramic acids and propiolic acids up to five catalytic runs without reduction in its catalytic activity.

ChemCatChem published new progress about Alkynes, α- Role: RCT (Reactant), RACT (Reactant or Reagent). 3240-10-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H5ClO2, SDS of cas: 3240-10-6.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Zeng, Fang; Zhang, Mingjuan; Li, Yiqun published the artcile< Cu2+ ion crosslinked carboxymethylcellulose/diatomite composite beads as an efficient catalyst for CuAAC reactions>, Recommanded Product: 1-Chloro-2-(chloromethyl)benzene, the main research area is diatomite supported copper ion crosslinked CM cellulose preparation surface structure; alkyne benzyl halide sodium azide copper catalyst regioselective cycloaddition; benzyl triazole preparation green chem.

Cu2+-crosslinked CM-cellulose/diatomite composite beads (CuII@CMC/DE) were prepared in simple and efficient way using ionic crosslinking techniques. In CuII@CMC/DE beads, diatomite serves as a reinforcing filler, and divalent copper cation acts as crosslinking agent. The chem. structure and morphol. of as-fabricated CuII@CMC/DE beads were well characterized using various techniques such as ICP, FT-IR, XRD, SEM, EDS, elemental mapping, TEM, XPS, and TGA. The CuII@CMC/DE beads exerted superior catalytic performance in CuAAC reactions of benzyl halides, sodium azide, and alkynes to yield regioselective 1,4-disubstituted-1,2,3-triazoles in excellent yields under green conditions. In these resultant catalytic composite beads, Cu2+ was used not only as a crosslinking agent but also as a metal catalyst for CuAAC reaction. The composite beads can be easily separated by filter and reused at least four times without any significant decrease on its activity and selectivity.

Polymers for Advanced Technologies published new progress about 1,3-Dipolar cycloaddition catalysts. 611-19-8 belongs to class chlorides-buliding-blocks, and the molecular formula is C7H6Cl2, Recommanded Product: 1-Chloro-2-(chloromethyl)benzene.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Yuan, Tao; Zheng, Meifang; Antonietti, Markus; Wang, Xinchen published the artcile< Ceramic boron carbonitrides for unlocking organic halides with visible light>, Category: chlorides-buliding-blocks, the main research area is boron carbonitride preparation surface structure; aryl halide boron carbonitride photocatalyst hydrodehalogenation; aromatic hydrocarbon preparation; arene aryl halide boron carbonitride photocatalyst cross coupling arylation; biaryl preparation; haloarene sodium sulfinate boron carbonitride photocatalyst cross coupling sulfonylation; arylsulfone preparation.

Here, boron carbonitride (BCN) ceramics were such a system and can reduce organic halides, including (het)aryl and alkyl halides, with visible light irradn was reported. Cross-coupling of halides to afford new C-H, C-C, and C-S bonds was proceeded at ambient reaction conditions. Hydrogen, (het)aryl, and sulfonyl groups were introduced into the arenes and heteroarenes at the designed positions by means of mesolytic C-X (carbon-halogen) bond cleavage in the absence of any metal-based catalysts or ligands. BCN was used not only for half reactions, like reduction reactions with a sacrificial agent, but also redox reactions through oxidative and reductive interfacial electron transfer. The BCN photocatalyst showed tolerance to different substituents and conserved activity after five recycles. The apparent metal-free system opened new opportunities for a wide range of organic catalysts using light energy and sustainable materials, which were metal-free, inexpensive and stable.

Chemical Science published new progress about Aromatic compounds, sulfones Role: SPN (Synthetic Preparation), PREP (Preparation). 22717-55-1 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H7ClO3, Category: chlorides-buliding-blocks.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Wan, Zi-juan; Wang, Jin-yuan; Luo, Jun published the artcile< NiCl2-catalyzed radical cross decarboxylative coupling between arylpropiolic acids and cyclic ethers>, Reference of 3240-10-6, the main research area is internal alkene preparation diastereoselective; arylpropiolic acid cyclic ether cross decarboxylative coupling nickel catalyst.

A direct alkenylation of cyclic ethers with arylpropiolic acids was developed for the synthesis of internal alkenes ArCH=CHR [Ar = Ph, 4-CNC6H4, 2-thienyl, etc.; R = tetrahydrofuran-2-yl, 1,3-dioxolan-4-yl, 1,4-dioxan-2-yl] via radical cross decarboxylative coupling process catalyzed by NiCl2 and using DTBP as radical initiator and oxidant. Mechanistic experiments were conducted to determine the nature of the reaction intermediates and a plausible reaction mechanism involving NiCl2-promoted radical process was proposed.

Tetrahedron Letters published new progress about Alkenes Role: SPN (Synthetic Preparation), PREP (Preparation). 3240-10-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H5ClO2, Reference of 3240-10-6.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Bhandu, Priyanka; Verma, Himanshu; Singh, Manmeet; Kumar, Manoj; Narendra, Gera; Choudhary, Shalki; Singh, Pankaj Kumar; Silakari, Om published the artcile< Rational designing of quinazolin-4(3H)-one based ALR2 inhibitors: Synthesis and biological evaluation>, COA of Formula: C7H6Cl2, the main research area is quinazolinone benzyl chloride nucleophilic substitution reaction; benzyl quinazolinone preparation ALR2 inhibition SAR mol docking.

Herein, using scaffold hoping, quinazolin-4(3H)-one was obtained as one of the top bioisostere with good BIF, shape and field scores. The designed inhouse library of quinazolin-4(3H)-one was studied for their SAR profile based on the developed qual. model via Activity atlas option. Important field points i.e., pos. and neg. electrostatics along with shape properties were analyzed that are crucial for ALR2 inhibitory activity. Some structure-based approaches including mol. docking and dynamics also suggested that the designed quinazolin-4(3H)-one based derivatives can be putative ALR2 inhibitors. These mols. were synthesized and evaluated for in-vitro ALR2 inhibitory activity. It was observed that compound three of the compounds were most potent inhibitors with IC50 values of 2.56 ± 0.03, 1.72 ± 0.02 and 1.47 ± 0.03μM, resp. Addnl., the predicted ADMET properties were also found to be favorable in comparison to Zenarestat.

Journal of Molecular Structure published new progress about Aralkyl chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 611-19-8 belongs to class chlorides-buliding-blocks, and the molecular formula is C7H6Cl2, COA of Formula: C7H6Cl2.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Nitsche, Tobias; Steinkoenig, Jan; De Bruycker, Kevin; Bloesser, Fabian R.; Blanksby, Stephen J.; Blinco, James P.; Barner-Kowollik, Christopher published the artcile< Mapping the Compaction of Discrete Polymer Chains by Size Exclusion Chromatography Coupled to High-Resolution Mass Spectrometry>, Computed Properties of 1592-20-7, the main research area is polystyrene tetrazole fumarate exclusion chromatog mass spectrometry.

We introduce a powerful approach based on the combination of size exclusion chromatog. with high-resolution mass spectrometry to selectively follow the compaction of discrete polymer chains that have uniform elemental composition Single-chain nanoparticles (SCNP) have attracted considerable interest for a wide range of applications associated with their adjustable morphol. However, the precise characterization of morphol. changes during the compaction is still challenging using existing anal. techniques. We employ a polystyrene backbone functionalized with tetrazole and fumarate moieties to utilize the nitrile imine-mediated tetrazole-ene cycloaddition for compaction. As every compaction step is associated with an elimination of one nitrogen mol., it can be monitored via high-resolution electrospray ionization mass spectrometry. The combination with size exclusion chromatog. enables the direct correlation of changes in mass with changes in morphol. associated with the compaction. By establishing a calibration between the retention time and the hydrodynamic radius, ion chromatograms of discrete chains can be directly applied to determine the reduction in hydrodynamic radius associated with each crosslinking event. Therefore, accessing the compaction of discrete polymer chains becomes possible for the first time.

Macromolecules (Washington, DC, United States) published new progress about Hydrodynamic radius. 1592-20-7 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H9Cl, Computed Properties of 1592-20-7.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics