Tag: M.W=300-350

Bakhtin, Stanislav published the artcileCatalytic activity of tertiary amines with antisymbatic change of basic and nucleophilic properties in the chloroxypropylation reaction of acetic acid, Quality Control of 23616-79-7, the publication is Reaction Kinetics, Mechanisms and Catalysis (2016), 119(1), 139-148, database is CAplus.

The kinetic dependence of the reaction of (chloromethyl)oxirane ring-opening by acetic acid in the presence of tertiary amines R₃N and R_nNMe₃–_n has been studied. The orders of reaction with respect to acid and catalyst have been determined The nucleophilicity of amines used has been measured in the quaternization reaction of R₃N and R_nNMe₃–_n by benzyl chloride (Menshutkin reaction). On the basis of correlations “amines structure-catalytic activity”, it has been shown that amines act as nucleophiles in this reaction.

Reaction Kinetics, Mechanisms and Catalysis published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Quality Control of 23616-79-7.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Priyanka, V. P. published the artcileEnhanced partitioning of tryptophan in aqueous biphasic systems formed by benzyltrialkylammonium based ionic liquids: Evaluation of thermophysical and phase behavior, Category: chlorides-buliding-blocks, the publication is Journal of Molecular Liquids (2017), 207-214, database is CAplus.

Ionic liquids (ILs) based aqueous biphasic systems (ABS) are envisioned to be promising separation and environmentally benign extraction media. In this context, novel ternary phase diagrams were determined for two ILs namely, Benzyltrimethylammonium chloride and Benzyltributylammonium chloride in presence of various potassium salts, K₃PO₄, K₂HPO₄, K₂CO₃ and KOH at 298.15 K. The influence of benzyl group substitution on the cation of IL and nature of various potassium salts on the phase behavior were analyzed. Exptl. binodal data were fitted to Merchuk’s equation and tie line compositions and tie line length were also determined Further, these IL based ABS in presence of various potassium salts have been systematically scrutinized for their efficiency to extract Tryptophan. For the better understanding of the role of thermophys. properties on phase behavior and extraction capability, d. and viscosity of coexisting phases were measured at various compositions in the temperature range from 293.15 to 328.15 K. Enhanced extraction coefficients achieved for the studied combinations of ILs and inorganic salts indicate the possible use of these ABS as efficient extraction systems. Further, the study of thermophys. properties suggested that selected ternary systems present more desirable features in terms of d. and viscosity as compared to traditional polymer based ABS.

Journal of Molecular Liquids published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Category: chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

De, Kakali published the artcileRadiolabeled novel peptide for imaging somatostatin receptor-expressing tumor: synthesis and radiobiological evaluation, Synthetic Route of 42074-68-0, the publication is Journal of Radioanalytical and Nuclear Chemistry (2014), 301(3), 847-861, database is CAplus.

The aim of this study was to synthesis, a radiolabeled (^99mTc) new somatostatin-analog 6-hydrazinopyridine-3-carboxylic-acid (HYNIC)-Asn³-octreotate (^99mTc-HYNIC-AATE), and to evaluate as a candidate for imaging somatostatin-receptor (SSTR)-pos. tumors and also compare it with ^99mTc-HYNIC-Tyr³-octreotide (^99mTc-HYNIC-TOC). Synthesis was performed by Fmoc-solid-phase strategy and ^99mTc labeled by SnCl₂. Biodistribution and imaging properties of new radiopeptide were also studied in C6 tumor bearing rat. Radiolabeling was performed at high specific activities and it showed high binding-affinity for SSTR2. In biodistribution, radiopeptides have showed high and receptor-specific uptake in the SSTR2 pos. organs, tumor with rapid renal excretion from non-target tissues. These results demonstrated that ^99mTc-HYNIC-AATE is a new specific radioligand for scintigraphy of somatostatin-receptor-pos. tumors.

Journal of Radioanalytical and Nuclear Chemistry published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, Synthetic Route of 42074-68-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

van Dijken, Derk Jan published the artcileAutoamplification of Molecular Chirality through the Induction of Supramolecular Chirality, Category: chlorides-buliding-blocks, the publication is Angewandte Chemie, International Edition (2014), 53(20), 5073-5077, database is CAplus and MEDLINE.

The novel concept for the autoamplification of mol. chirality, wherein the amplification proceeds through the induction of supramol. chirality, is presented. A solution of prochiral, ring-open diarylethenes is doped with a small amount of their chiral, ring-closed counterpart. The mols. co-assemble into helical fibers through hydrogen bonding and the handedness of the fibers is biased by the chiral, ring-closed diarylethene. Photochem. ring closure of the open diarylethene yields the ring-closed product, which is enriched in the template enantiomer.

Angewandte Chemie, International Edition published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C18H24N6O6S4, Category: chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Luo, Qianfu published the artcilePreparation and solvent-dependent photochromism of triptycene-bonded dithienylethenes, HPLC of Formula: 219537-97-0, the publication is Chemistry Letters (2014), 43(10), 1584-1586, database is CAplus.

Two new, stable photochromic dithienylethenes DTE-1 and DTE-2 based on triptycene were conveniently synthesized in one pot. Their spectral properties and photochromism in different solvents were studied extensively. It was revealed that the two DTE-triptycene conjugates undergo special UV-vis absorption and color change in chloride solvents when irradiated by UV light.

Chemistry Letters published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, HPLC of Formula: 219537-97-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Yuan, Jingjing published the artcileSubstituent position effect on photochromic properties of aldehyde-functionalized dithienylethenes, SDS of cas: 219537-97-0, the publication is Molecular Crystals and Liquid Crystals (2020), 712(1), 24-30, database is CAplus.

Three sym. dithienylethenes bearing two electron-withdrawing aldehyde groups have been synthesized. And their structures were confirmed by ¹H NMR, ¹³C NMR and HRMS (ESI). Investigation on photochromic properties indicated that they had good photochromic behavior with excellent fatigue resistance upon irradiation with UV or visible light. And it was found that the aldehyde substituent position had a significant effect on their photochromic properties. The DFT calculations further validated those exptl. results for their photochromic behavior. Furthermore, they may be used as versatile building blocks to construct novel photochromic materials.

Molecular Crystals and Liquid Crystals published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C37H30ClIrOP2, SDS of cas: 219537-97-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Presa, Andreu published the artcileNon-Switching 1,2-Dithienylethene-based Diplatinum(II) Complex Showing High Cytotoxicity, Related Products of chlorides-buliding-blocks, the publication is Inorganic Chemistry (2016), 55(11), 5356-5364, database is CAplus and MEDLINE.

A diplatinum(II) complex was prepared from a new 1,2-dithienyl-ethene-based ligand containing N-methylimidazole groups as metal-binding units. Reaction of the ligand 1,2-bis[2-methyl-5-(1-methyl-1H-imidazol-2-yl)-3-thienyl]-cyclopentene (L2^H) with cis-dichlorobis(dimethylsulfoxido)platinum(II) generated the bimetallic complex trans-[Pt₂Cl₄(DMSO)₂(L2^H)] (1), whose DNA-interacting properties were studied using different techniques. Cytotoxicity assays with various cancer cell lines showed that this compound is active, with IC₅₀ values in the micromolar range. Surprisingly, the diplatinum(II) complex does not exhibit the anticipated photoswitching properties; indeed, UV irradiation does not lead to the photocyclization of the ligand L2^H or of the metal complex. Computational studies were performed and revealed significant differences in the electronic structure of L2^H compared with L1^H (i.e., 1,2-bis[2-methyl-5-(4-pyridyl)-3-thienyl]-cyclopentene, which exhibits photoswitching properties), in terms of the relevant MOs involved in the UV-visible absorption features, which ultimately is responsible for the inertia of L2^H toward photocyclization.

Inorganic Chemistry published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, Related Products of chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Zhao, Guofeng published the artcileDevelopment of a displacer-immobilized ligand docking scheme for displacer screening for protein displacement chromatography, Synthetic Route of 23616-79-7, the publication is Biochemical Engineering Journal (2011), 55(1), 32-42, database is CAplus.

Displacement chromatog. is a powerful technique for protein purification, but the availability of high-efficacy displacers has greatly limited its applications. In this work, a displacer-immobilized ligand docking scheme was developed for the prediction of displacer efficacy and displacer screening for displacement chromatog. of proteins. The structure of immobilized ligand was established by coupling a certain number of ligands to the 3D structure of agarose. A number of known cation, anion and hydrophobic displacers were docked to their resp. immobilized ligands to verify the effectiveness of the scheme, and the Spearman ranking correlation coefficients of all cases were over 0.5. The scheme was then used to screen displacers for hydrophobic charge induction chromatog. from over 1800 com. available compounds Column displacement experiments of several representative compounds showed that the identified displacers were efficacious in the displacement of single component and binary mixtures It is expected that the combination of the docking scheme with the existing techniques for displacer discovery/design would greatly facilitate the discovery of high-affinity displacers for protein purification

Biochemical Engineering Journal published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C14H22O2, Synthetic Route of 23616-79-7.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Dill, Maren published the artcileEnhanced Accuracy of Single-Molecule Diffusion Measurements with a Photocleavable Energy-Transfer Dyad, SDS of cas: 42074-68-0, the publication is Angewandte Chemie, International Edition (2013), 52(47), 12435-12438, database is CAplus and MEDLINE.

We developed and photochem. characterized a photocleavable energy-transfer dyad and demonstrated its applicability for single-mol. microspectroscopy. After photocleavage, it allows for following the evolution of distances between both fragments from the nm to the pm length scale using single-mol. energy-transfer efficiencies and independent two-color tracking, resp. Observation of changes in the single-mol. energy-transfer efficiencies between both fragments enables the determination of low single-mol. diffusion coefficients and their distribution with high accuracy compared to single-mol. tracking. Future work will focus on exploiting our novel approach to measure slow diffusion in polymer systems and to extend it to other fluorophores and photolabile moieties.

Angewandte Chemie, International Edition published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, SDS of cas: 42074-68-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Santos, Isabel C. M. S. published the artcileCatalytic performance of a boron peroxotungstate complex under homogeneous and heterogeneous conditions, Category: chlorides-buliding-blocks, the publication is Catalysis Today (2013), 87-94, database is CAplus.

The preparation and characterization (FTIR, FT-Raman, ¹¹B MAS NMR, diffuse reflectance, elemental anal.) of a novel boron peroxotungstate (BTBA)₄H[BW₄O₂₄] (BTBA = benzyltributylammonium) is reported, along with its use in the homogeneous oxidation of cis-cyclooctene, geraniol, linalool and (-)-carveol with H₂O₂ as oxidant and acetonitrile as solvent. High catalytic activity was registered for all the substrates studied under homogeneous conditions, namely 99% of conversion of geraniol after 2 h, 93% for linalool after 5 h, 74% for cis-cyclooctene after 6 h, and 100 % for (-)-carveol after 2 h of reaction. Some oxidation studies were carried out with the Venturello complex, [PW₄O₂₄]^3-, in the same conditions. Furthermore, the boron peroxotungstate (BW₄) was immobilized using two different strategies: (a) BW₄ anchored into a functionalized silica (aptesSiO₂) giving BW₄@aptesSiO₂ and (b) BW₄ encapsulated on a metal organic framework, commonly referred as MIL-101, giving BW₄@MIL-101. The catalytic activity of both heterogeneous materials was investigated for geraniol oxidation and the results were compared with those obtained with BW₄ under homogeneous conditions. The encapsulated boron peroxotungstate (BW₄@MIL-101) gave rise to the best results, reaching complete conversion of geraniol after 3 h of reaction and 78% selectivity for 2,3-epoxygeraniol. Addnl., this heterogeneous catalyst could be reused without appreciable loss of catalytic activity, affording similar 2,3-epoxygeraniol selectivity. The heterogeneous catalysts’ stability was also investigated after the oxidation reactions by different characterization techniques.

Catalysis Today published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Category: chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics