Category: 56523-59-2

Pindzola, Bradford A. published the artcilePolymerization of a Phosphonium Diene Amphiphile in the Regular Hexagonal Phase with Retention of Mesostructure, Application In Synthesis of 56523-59-2, the main research area is phosphonium diene amphiphile liquid crystal polymerization; tetradecadienyltrimethylphosphonium bromide preparation polymerization liquid crystal.

Three phosphonium diene mesogens were prepared from the corresponding ω-bromoalkyldienes by reaction with tri-Me phosphine in 2-propanol at 85°. Tetradeca-11,13-dienyltrimethylphosphonium bromide demonstrated the best lyotropic liquid crystal behavior and could be homopolymerized or copolymerized with divinylbenzene in the H1 phase with retention of the mesostructure.

Journal of the American Chemical Society published new progress about Liquid crystals, lyotropic. 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Application In Synthesis of 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Geddes, Chris D. published the artcileNew fluorescent indolium and quinolinium dyes for applications in aqueous halide sensing, SDS of cas: 56523-59-2, the main research area is fluorescent cationic dye preparation halide sensor.

Bromide and teraphenylborate salts of six new highly fluorescent dyes, produced by the reaction of two heterocyclic nitrogen bases (6-methoxyquinoline and harman) with 8-bromooctanoic acid, 11-bromoundecanoic acid, and 15-bromopentadecanoic acid have been prepared Unlike the bases themselves, the quaternary salts are water soluble and have fluorescence characteristics independent of pH in the range 7-11. Both the fluorescence intensity and fluorescence lifetime of these dyes are reduced in the presence of aqueous halide ions, allowing halide concentrations to be determined accurately at concentrations of importance to both medicine and industry. All the dyes have been characterized in terms of steady state fluorescence spectra and steady-state Stern-Volmer anal. The Stern-Volmer constants for the dyes are compared to those obtained for some com. available dyes. The prospects for using these dyes in halide sensor devices are discussed.

Dyes and Pigments published new progress about Cationic dyes (fluorescent). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, SDS of cas: 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Geddes, C. D. published the artcileFluorescent indolium dyes for applications in aqueous halide sensing-part 2: the repeated alkylation of Harmane post quaternisation, HPLC of Formula: 56523-59-2, the main research area is carboxyoctylation quaternization harmane fluorescent dye hallucinogen; methoxyquinoline carboxyoctylation quaternization.

The repeated alkylation of harmane (1-methyl-9H-pyrido[3,4-b]indole) after quaternization has been observed during fusion with 8-bromooctanoic acid (I). This can be explained by two possible competing mechanisms, the electrophilic addition of carboxyalkylating agent to the resonance enamine form of the initial quaternized product and/or oligoester formation between the quaternized product and I. The mechanisms are supported by 1H NMR, FTIR, and mass spectrometry anal., and by carboxyoctylation of 6-methoxyquinoline. The possibility for controlling the repeated alkylation in nanometer size silica pores, in essence restricted geometry nanometer size reaction vessels, is discussed.

Dyes and Pigments published new progress about Carboxyalkylation (repeated). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, HPLC of Formula: 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Chen, Xiaoping published the artcileMolecular diodes with rectification ratios exceeding 105 driven by electrostatic interactions, COA of Formula: C15H29BrO2, the main research area is mol diode rectification ratio electrostatic interaction.

Mol. diodes operating in the tunnelling regime are intrinsically limited to a maximum rectification ratio R of ∼103. To enhance this rectification ratio to values comparable to those of conventional diodes (R ≥ 105) an alternative mechanism of rectification is therefore required. Here, the authors report a mol. diode with R = 6.3 × 105 based on self-assembled monolayers with Fc-C≃C-Fc (Fc, ferrocenyl) termini. The number of mols. (n(V)) involved in the charge transport changes with the polarity of the applied bias. More specifically, n(V) increases at forward bias because of an attractive electrostatic force between the pos. charged Fc units and the neg. charged top electrode, but remains constant at reverse bias when the Fc units are neutral and interact weakly with the pos. charged electrode. The authors successfully model this mechanism using mol. dynamics calculations

Nature Nanotechnology published new progress about Activation energy (of conductivity). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, COA of Formula: C15H29BrO2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Crescenzi, Manuela published the artcileIon association and reactivity of the alkali metal salts of alkanoic acids in dipolar aprotic solvents, Recommanded Product: 15-Bromopentadecanoic acid, the main research area is ion association lactonization kinetics; carboxylic acid lactonization alkali metal ion.

The effect of added alkali metal perchlorates on the rate of lactonization of ω-bromoalkanoate ions was investigated in 99% DMSO (4-membered ring formation) and in DMF (4- and 16-membered ring formation). In all cases, the effect of the added metal salts is rate depressing, as a result of the lower reactivity of metal ion-associated species relative to the free ions. Ion-pairing association constants were determined, but the reactivity of ion pairs was so low as to elude direct measurement in most cases. Evidence was also obtained for the formation of ion triplets with Li+ in DMF. The relevance of the present results in connection with the cesium effect is briefly discussed.

Journal of Physical Organic Chemistry published new progress about Alkali metal ions Role: PRP (Properties). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Recommanded Product: 15-Bromopentadecanoic acid.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ravi, S. published the artcileMacrocyclic musk compounds: Synthetic approaches to key intermediates for exaltolide, exaltone and dilactones, Name: 15-Bromopentadecanoic acid, the main research area is macrocyclic lactone exaltolide exaltone synthesis.

Facile syntheses to key intermediates 15-bromopentadecanoic acid and Me 15-hydroxypentadecanoate (for exaltolide), di-Me pentadecanedioate (for exaltone) and tridecanedioic acid and undecanedioic acid (for ethylene brassylate and cyclic ethylene undecanedioate), resp., was achieved from easily accessible aleuritic acid and 10-undecenoic acid.

Journal of the Indian Institute of Science published new progress about Lactones Role: SPN (Synthetic Preparation), PREP (Preparation). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Name: 15-Bromopentadecanoic acid.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Okore, V. C. published the artcileGC-MS analysis of fatty acids of Irvingia gabonensis seed fat, Application of 15-Bromopentadecanoic acid, the main research area is fatty acid Irvingia seed fat.

Dika fat is the name given to the waxy material obtained from the seeds of Irvingia gabonensis (Fam. Irvingiaceae). The fat has been a subject of research in recent years, and it has been evaluated as a component of different drug delivery systems . Despite the impressive properties of this wax as have been established in the earlier studies, information on its chem. composition is rather scanty. Chem. characterization of the wax was done by GC-MS technique. The dika fat was obtained by solvent extraction, using the method described by Udeala et al (1980). A Fisons Trio 200 Quadrupole GC-MS instrument fitted with a 30m × 0.32mm (i.d.) OV-1 capillary column, was used for the anal. The column temperature was programmed to rise from 100°C to 280°C at the rate of 5°/min. The carrier gas was helium flowing at the rate of 1.5ml/min. Ionization voltage of 70eV was applied. The solvent for dika fat was n-hexane. The identity of the components of dika fat was confirmed by a combination of computer-aided identification, the eight peak index of mas spectra as well as co-chromatog. The gas chromatogram of dika fat reveals seven peaks representing major components and about the same number of peaks for the minor components.

Nigerian Journal of Natural Products and Medicine published new progress about Fats and Glyceridic oils Role: ANT (Analyte), ANST (Analytical Study) (dika). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Application of 15-Bromopentadecanoic acid.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Tu, Zhude published the artcileSynthesis and Evaluation of 15-(4-(2-[18F]Fluoroethoxy)phenyl)pentadecanoic Acid: A Potential PET Tracer for Studying Myocardial Fatty Acid Metabolism, HPLC of Formula: 56523-59-2, the main research area is fluorine 18 fluoroethoxy phenyl pentadecanoic acid preparation PET imaging; myocardial fatty acid metabolism imaging PET.

15-(4-(2-[18F]fluoroethoxy)phenyl)pentadecanoic acid ([18F]7) was synthesized as a PET probe for assessing myocardial fatty acid metabolism The radiosynthesis of [18F]7 was accomplished using a two-step reaction, starting with the corresponding tosylate ester, Me 15-(4-(2-(tosyloxy)ethoxy)phenyl)pentadecanoate (5), and gave the radiolabeled fatty acid, [18F]7 in a radiolabeling yield of 55-60% and a specific activity of >2000 Ci/mmol (decay corrected to EOB). The biol. evaluation of [18F]7 in rats displayed high uptake in heart (1.94%ID/g at 5 min), which was higher than the uptake (%ID/g) in blood, lung, muscle, pancreas, and brain. MicroPET studies of [18F]7 in Sprague-Dawley rats demonstrated excellent images of the myocardium when compared with [11C]palmitate images in the same animal. Moreover, the tracer kinetics of [18F]7 paralleled those seen with [11C]palmitate, with an early peak followed by biphasic washout. When compared to [11C]palmitate, [18F]7 exhibited a slower early clearance (0.17 ± 0.01 vs 0.30 ± 0.02, P < 0.0001) and a significantly higher late clearance (0.0030 ± 0.0005 vs 0.0006 ± 0.00013, P < 0.01). These initial studies suggest that [18F]7 could be a potentially useful clin. PET tracer to assess abnormal myocardial fatty acid metabolism Bioconjugate Chemistry published new progress about Fatty acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, HPLC of Formula: 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Stoll, G. H. published the artcileSynthesis of a metabolically stable modified long-chain fatty acid salt and its photolabile derivative, Category: bromides-buliding-blocks, the main research area is stearate analog heptafluorooctadecanoate salt; fatty acid salt transport; photoaffinity labeling polypeptide sodium azoheptafluorooctadecanoate; critical micellar concentrate heptafluorooctadecanoic acid; diazirine derivative heptafluorooctadecanoate.

An analog of the long-chain fatty acid salt, sodium stearate, was synthesized in which the H atoms at carbons 2, 3, and 18 were replaced by fluorine. The key step in the synthesis was the addition of 3-iodo-2,2,3,3-tetrafluoropropanoic acid amide to 15,15,15-trifluoro-1-pentadecene. Radioactivity was introduced by catalytic reduction of 2,2,3,3,18,18,18-heptafluoro-4-octadecenoic acid amide with carrier-free tritium gas yielding a product with the specific radioactivity of 2.63 TBq/mmol. The resulting 2,2,3,3,18,18,18-heptafluoro-4-octadecenoic acid has a pKa of about 0.5 and is completely dissociated under normal physiol. conditions. The fluorinated fatty acid salt analog is readily taken up into hepatocytes and proved to be metabolically inert. In an approach to the identification of proteins involved in long-chain fatty acid salt transport across membranes and intracellular compartments, the photolabile derivative 11,11-azo-2,2,3,3,18,18,18-heptafluoro[G-3H]octadecanoic acid sodium salt was synthesized with a specific radioactivity of 2.63 TBq/mmol. Photolysis of the photolabile derivative, using a light source with a maximum emission at 350 nm, occurred with a half-life of 1.5 min. The generated carbene reacted with 14C-labeled MeOH and MeCN with covalent bond formation of 6-13%. Its efficacy for photoaffinity labeling was demonstrated by incorporation into serum albumin, the extracellular fatty acid salt-binding protein, as well as into the intracellular fatty acid salt-binding protein (FABP) of rat liver with mol. weight of 14,000.

Journal of Lipid Research published new progress about Fatty acid-binding proteins Role: RCT (Reactant), RACT (Reactant or Reagent). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Taleshi, Mojtaba S. published the artcileSynthesis and Characterization of Arsenolipids: Naturally Occurring Arsenic Compounds in Fish and Algae, Category: bromides-buliding-blocks, the main research area is arsenolipid arsenic lipid fatty acid long chain preparation reactivity.

Arsenic-containing lipids (arsenolipids) are natural products present in fish and algae. Because these compounds occur in foods, there is considerable interest in their human toxicol. We report the synthesis and characterization of seven arsenic-containing lipids, including six natural products. The compounds comprise dimethylarsinyl groups attached to saturated long-chain hydrocarbons (three compounds), saturated long-chain fatty acids (two compounds), and monounsaturated long chain fatty acids (two compounds). The arsenic group was introduced through sodium dimethylarsenide or bis(dimethylarsenic) oxide. The latter route provided higher and more reproducible yields, and consequently, this pathway was followed to synthesize six of the seven compounds Mass spectral properties are described to assist in the identification of these compounds in natural samples. The pure synthesized arsenolipids will be used for in vitro experiments with human cells to test their uptake, biotransformation, and possible toxic effects.

Organometallics published new progress about Lipids Role: SPN (Synthetic Preparation), PREP (Preparation) (arsenolipids). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary