Tag: M.W=300-350

Dhanabal, T. published the artcileSynthesis, spectral, thermal and optical characterization of benzyltributylammonium trichlorobarium(II) monohydrate crystal, Formula: C19H34ClN, the publication is Optik (Munich, Germany) (2014), 125(1), 159-163, database is CAplus.

A new nonlinear optical semiorg. crystal, benzyltributylammonium trichlorobarium(II) monohydrate was grown by slow evaporation solution growth method at ambient temperature The powder X-ray diffraction pattern of the crystal confirms its crystallinity. The absorption spectrum of the material shows a peak at 265 nm and no absorption observed in the entire visible region indicates that the compound can be used as a nonlinear optical material. The optical transmittance spectrum of the grown crystal shows a lower cut-off wavelength at 235 nm with transparency of 88%. Thermal stability of the crystal was studied by thermogravimetry-differential thermogravimetry and differential thermal analyses (TG-DTG and DTA). The differential scanning calorimetry (DSC) anal. shows thermal anomalies in the heating and cooling cycles that indicates the occurrence of a first order phase transition. The various characteristics absorption chem. bands and BaCl₃^– vibration were assigned through fourier transform IR (FTIR) spectral anal. The second harmonic generation efficiency (SHG) of the grown crystal was analyzed by Kurtz-Perry powder technique using Nd:YAG laser. The dielec. constant and dielec. loss of the compound decrease with increase in frequency.

Optik (Munich, Germany) 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, Formula: C19H34ClN.

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

Lerner Yardeni, Jenny published the artcileSequence dependent proton conduction in self-assembled peptide nanostructures, Computed Properties of 42074-68-0, the publication is Nanoscale (2016), 8(4), 2358-2366, database is CAplus and MEDLINE.

The advancement of diverse electrochem. technologies depends on the development of novel proton conducting polymers. Inspired by the efficacy of proton transport through proteins, we show in this work that self-assembling peptide nanostructures may be a promising alternative for such organic proton conducting materials. We demonstrate that aromatic amino acids, which participate in charge transport in nature, unprecedentedly promote proton conduction under both high and low relative humidity conditions for D,L α-cyclic peptide nanotubes. For dehydrated networks long-range order of the assemblies, induced by the aromatic side chains, is shown to be a dominating factor for promoting conductivity However, for hydrated networks this order of effect is less significant and conductivity can be improved by the introduction of proton donating carboxylic acid peptide side chains in addition to the aromatic side chains despite the lower order of the assemblies. Based on these observations, a novel cyclic peptide that incorporates non-natural naphthyl side chains was designed. Self-assembled nanotubes of this peptide show greatly improved dehydrated conductivity, while maintaining high conductivity under hydrated conditions. We envision that the demonstrated modularity and versatility of these bio inspired nanostructures will make them extremely attractive building blocks for the fabrication of devices for energy conversion and storage applications, as well as other applications that involve proton transport, whether dry or wet conductivity is desired.

Nanoscale 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, Computed Properties of 42074-68-0.

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

Ieronymaki, Matthaia published the artcileUse of the 2-chlorotrityl chloride resin for microwave-assisted solid phase peptide synthesis, Related Products of chlorides-buliding-blocks, the publication is Biopolymers (2015), 104(5), 506-514, database is CAplus and MEDLINE.

A fast and efficient microwave (MW)-assisted solid-phase peptide synthesis protocol using the 2-chlorotrityl chloride resin and the Fmoc/tBu methodol., has been developed. The established protocol combines the advantages of MW irradiation and the acid labile 2-chlorotrityl chloride resin. The effect of temperature during the MW irradiation, the degree of resin substitution during the coupling of the first amino acids and the rate of racemization for each amino acid were evaluated. The suggested solid phase methodol. is applicable for orthogonal peptide synthesis and for the synthesis of cyclic peptides. © 2015 Wiley Periodicals, Inc. Biopolymers (Pept Sci) 104: 506-514, 2015.

Biopolymers 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, Related Products of chlorides-buliding-blocks.

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

Zhang, Hefeng published the artcileAnionic polymerization and polyhomologation: an ideal combination to synthesize polyethylene-based block copolymers, Formula: C19H34ClN, the publication is Chemical Communications (Cambridge, United Kingdom) (2013), 49(79), 8952-8954, database is CAplus and MEDLINE.

A novel one-pot methodol. combining anionic polymerization and polyhomologation, through a “bridge” mol. (BF₃OEt₂), was developed for the synthesis of polyethylene (PE)-based block copolymers. The anionically synthesized macroanion reacts with the “bridge” mol. to afford a 3-arm star (trimacromol. borane) which serves as an initiator for the polyhomologation.

Chemical Communications (Cambridge, United Kingdom) 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 C12H19BrS, Formula: C19H34ClN.

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

Hadj-Kali, Mohamed K. published the artcileApplication of deep eutectic solvents and their individual constituents as surfactants for enhanced oil recovery, Synthetic Route of 23616-79-7, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2015), 221-231, database is CAplus.

We investigated the potential use of choline chloride/urea and choline chloride/glycerol deep eutectic solvents (DESs) and their individual constituents (the salt and the hydrogen bond donor) as surfactants for enhanced oil recovery. The interfacial tension (IFT) between Saudi medium crude oil and different concentrations of these DESs (and their individual components) in 10 wt% NaCl aqueous solutions were measured as a function of temperature Results showed that the IFT values decreased with the increase of both the DES concentration and temperature The effect of adding the salt and the hydrogen bond donor (HBD) sep., without forming the corresponding DES, on IFT values was also explored. It was found that, in most cases, adding the DES or its corresponding constituents sep. has the same effect on the IFT. Furthermore, ¹H NMR and different 2D NMR anal. (NOESY and HOESY) were used to examine the nature of mol. interactions that occur in studied DESs and how water affects these interactions. It was found that while the content of water is below 25 wt% the interactions of DES’ components become weak. However, the addition of 50 wt% water breaks the hydrogen bonding so that no interactions between the HBD and the salt were observed

Colloids and Surfaces, A: Physicochemical and Engineering Aspects 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, Synthetic Route of 23616-79-7.

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

Doetterl, Matthias published the artcileNickel-Catalyzed Propene Dimerization Reactions in Triphenylbismuth-Buffered Chloroaluminate Ionic Liquids: High Performance with Unconventional Cations, Category: chlorides-buliding-blocks, the publication is Advanced Synthesis & Catalysis (2012), 354(2-3), 399-407, database is CAplus.

The addition of triphenylbismuth (BiPh₃) efficiently buffers Lewis acidic chloroaluminate ionic liquids over a wide range of compositions Since the m.ps. of these ternary mixtures are lower compared to unbuffered chloroaluminate systems, the scope of cations for the formation of buffered room temperature ionic liquids is greatly extended. The buffered ionic liquids were used to activate nickel complexes for selective biphasic propene dimerization reactions. Lifetimes, selectivities and productivities of such dimerization catalysts could be adjusted by the choice of the cation and the composition At lower reaction temperatures, the selectivities to give dimers increased significantly. Propene dimers were obtained with selectivities of up to 98%. A cation screening with 100 ammonium and phosphonium halide salts was performed. N-Methylpyrrolidine hydrochloride gave the best results in terms of selectivity and lifetime. Propene dimerization reactions in BiPh₃-buffered chloroaluminate melts were catalyzed by various soluble nickel compounds with similar performances. The introduction of basic, sterically demanding tricyclohexylphosphine ligands led to higher degrees of branching, however, at the expense of lower dimer selectivities.

Advanced Synthesis & 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, Category: chlorides-buliding-blocks.

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

Babii, Oleg published the artcileDirect Photocontrol of Peptidomimetics: An Alternative to Oxygen-Dependent Photodynamic Cancer Therapy, Computed Properties of 219537-97-0, the publication is Angewandte Chemie, International Edition (2016), 55(18), 5493-5496, database is CAplus and MEDLINE.

Conventional photodynamic treatment strategies are based on the principle of activating mol. oxygen in situ by light, mediated by a photosensitizer, which leads to the generation of reactive oxygen species and thereby causes cell death. A diarylethene-derived peptidomimetic is presented that is suitable for photodynamic cancer therapy without any involvement of oxygen. This light-sensitive mol. is not a mediator but is itself the cytotoxic agent. As a derivative of the cyclic amphiphilic peptide gramicidin S, the peptidomimetic exists in two thermally stable photoforms that are interconvertible by light of different wavelengths. The isomer generated by visible light shows much stronger toxicity against tumor cells than the UV-generated isomer. First in vivo applications are demonstrated on a tumor animal model to illustrate how the peptidomimetic can be administered in the less toxic form and then activated locally in a solid tumor by visible light.

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 C15H14Cl2S2, Computed Properties of 219537-97-0.

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

Tselios, Theodore published the artcileRational design and synthesis of altered peptide ligands based on human myelin oligodendrocyte glycoprotein 35-55 epitope: inhibition of chronic experimental autoimmune encephalomyelitis in mice, SDS of cas: 42074-68-0, the publication is Molecules (2014), 19(11), 17968-17984, 17 pp., database is CAplus and MEDLINE.

Exptl. autoimmune encephalomyelitis (EAE) is a demyelinating disease of the central nervous system and is an animal model of multiple sclerosis (MS). Although the etiol. of MS remains unclear, there is evidence T-cell recognition of immunodominant epitopes of myelin proteins, such as the 35-55 epitope of myelin oligodendrocyte glycoprotein (MOG), plays a pathogenic role in the induction of chronic EAE. Cyclization of peptides is of great interest since the limited stability of linear peptides restricts their potential use as therapeutic agents. Herein, we have designed and synthesized a number of linear and cyclic peptides by mutating crucial T cell receptor (TCR) contact residues of the human MOG35-55 epitope. In particular, we have designed and synthesized cyclic altered peptide ligands (APLs) by mutating Arg41 with Ala or Arg41 and Arg46 with Ala. The peptides were synthesized in solid phase on 2-chlorotrityl chloride resin (CLTR-Cl) using the Fmoc/t -Bu methodol. The purity of final products was verified by RP-HPLC and their identification was achieved by ESI-MS. It was found that the substitutions of Arg at positions 41 and 46 with Ala results in peptide analogs that reduce the severity of MOG-induced EAE clin. symptoms in C57BL/6 mice when co-administered with mouse MOG35-55 peptide at the time of immunization.

Molecules 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 C8H7NO4, SDS of cas: 42074-68-0.

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

Thajudeen, H. published the artcilePhase Transfer Catalysis: Polymerization Kinetics and Mechanism of Methyl Acrylate, Quality Control of 23616-79-7, the publication is International Journal of Polymeric Materials (2008), 57(9), 904-917, database is CAplus.

Kinetics and mechanism of Me acrylate (MA) radical polymerization using KHSO₅ as water-soluble initiator in the presence of benzyltributylammonium chloride (BTBAC) as a phase-transfer catalyst were studied. Polymerization was carried out under inert and unstirred conditions at 60±1° in EtOAc/water biphasic medium. The rate of polymerization increased with increasing concentrations of MA, BTBAC and KHSO₅. The reaction order with respect monomer, initiator and catalyst was 1.0, 0.5 and 0.5, resp. The rate was independent of ionic strength and pH of the medium. Based on the kinetic evidence, a suitable mechanism is proposed.

International Journal of Polymeric Materials 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

Tuktarov, A. R. published the artcileSynthesis and photochromic properties of hybrid molecules based on fullerene C₆₀ and 3,3′-(cyclopent-1-ene-1,2-diyl)bis(5-chloro-2-methylthiophene), Safety of 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, the publication is Russian Journal of Organic Chemistry (2017), 53(6), 891-897, database is CAplus.

A series of C₆₀ adducts with azides derived from 3,3′-(cyclopent-1-ene-1,2-diyl)bis(5-chloro-2-methylthiophene) have been synthesized for the first time, and their photochromic properties have been studied. The effects of the structure of the spacer connecting the fullerene and dihetarylethene moieties and electronic structure of the fullerene skeleton on the efficiency of photoinduced transformations of the new hybrid mols. have been estimated

Russian Journal of Organic 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 C5H10O, Safety of 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene.

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