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Journal articles on the topic 'Alcools fluorés'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Červená, Irena, Jiří Holubek, Emil Svátek, Martin Valchář, and Miroslav Protiva. "Potential antidepressants: 3-Methyl-6-dimethylamino-1,2-diphenylhexan-3-ol and related compounds." Collection of Czechoslovak Chemical Communications 52, no. 10 (1987): 2564–71. http://dx.doi.org/10.1135/cccc19872564.

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3,4-Diphenylbutan-2-one (III) and 3-methyl-3-phenylbutan-2-one were transformed by treatment with 3-dimethylaminopropylmagnesium chloride and 1-methyl-4-piperidylmagnesium chloride to the amino alcohols VI, VII, and X. Compound VI was dehydrated to the olefinic amine VIII, and reduced to the saturated amine IX. 2-(3-Fluoro-4-hydroxyphenyl)ethylamine (XI) was prepared by a modified route via the methoxy precursor XV. Only the amino alcohol VI showed antireserpine activity in one test. The fluoro analogue of dopamine XI did show neither the dopaminomimetic nor the antidopaminergic character.

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2

Slavíková, Barbora, Alexander Kasal, Hana Chodounská та Zdena Krištofíková. "3α-Fluoro Analogues of "Allopregnanolone" and Their Binding to GABAA Receptors". Collection of Czechoslovak Chemical Communications 67, № 1 (2002): 30–46. http://dx.doi.org/10.1135/cccc20020030.

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(Diethylamino)sulfur trifluoride (DAST) was used for the preparation of 3α-fluorides (e.g., 3α-fluoro-5α-pregnane-12,20-dione, 3α-fluoro-16α-[(methoxycarbonyl)methyl]-5α-pregnan-20-one, methyl 3α-fluoro-5α-androstane-17β-carboxylate, 3α-fluoro-5β-pregnan-20-one) from the corresponding 3β-alcohols and for the preparation of 3,3-difluorides from 3-ketones (e.g., 3,3-difluoro-5α-pregnan-20-one). Boron trifluoride etherate was used for the conversion of an epoxide into 3α-fluoro-2β-hydroxy-5α-pregnan-20-one. The in vitro binding of the 3α-fluorides and the corresponding 3α-alcohols to the GABAA re

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3

Nişancı, Bilal, and Ziya Dağalan. "A facile and highly efficient transfer hydrogenation of ketones and aldehydes catalyzed by palladium nanoparticles supported on mesoporous graphitic carbon nitride." Journal of Chemical Research 44, no. 1-2 (2019): 14–19. http://dx.doi.org/10.1177/1747519819883792.

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A novel transfer hydrogenation methodology for the reduction of ketones (14 examples) and benzaldehyde derivatives (12 examples) to the corresponding alcohols using Pd nanoparticles supported on mesoporous graphitic carbon nitride (mpg-C3N4/Pd) as a reusable catalyst and ammonia borane as a safe hydrogen source in an aqueous solution MeOH/H2O (v/v = 1/1) is described. The catalytic hydrogenation reactions were conducted in a commercially available high-pressure glass tube at room temperature, and the corresponding alcohols were obtained in high yields in 2–5 min. Moreover, the presented transf

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4

Shaw, J. P., F. Schwager, and S. Harayama. "Substrate-specificity of benzyl alcohol dehydrogenase and benzaldehyde dehydrogenase encoded by TOL plasmid pWW0. Metabolic and mechanistic implications." Biochemical Journal 283, no. 3 (1992): 789–94. http://dx.doi.org/10.1042/bj2830789.

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The substrate-specificities of benzyl alcohol dehydrogenase and benzaldehyde dehydrogenase, encoded by TOL plasmid pWW0 of Pseudomonas putida mt-2, were determined. The rates of benzyl alcohol dehydrogenase-catalysed oxidation of substituted benzyl alcohols and reduction of substituted benzaldehydes were independent of the electronic nature of the substituents at positions 3 and 4. Substitutions at position 2 of benzyl alcohol affected the reactivity of benzyl alcohol dehydrogenase: the velocity of the benzyl alcohol dehydrogenase-catalysed oxidation was lower for compounds possessing electron

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5

Yi, Wen-Bin, and Chun Cai. "Cobalt(II) Perfluorooctane Sulfonate Catalyzed Highly Efficient Aerobic Oxidation of Alcohols in Fluorous Biphasic Systems." Australian Journal of Chemistry 59, no. 5 (2006): 349. http://dx.doi.org/10.1071/ch05250.

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Cobalt(ii) perfluorooctane sulfonate (Co(OPf)2) acts as a novel homogeneous pre-catalyst for the oxidation of various types of alcohols to carbonyl compounds under atmospheric pressure of molecular oxygen in fluorous biphasic systems. By simple separation of the fluorous phase, which contains only pre-catalyst, the reaction can be repeated several times.

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6

Broxton, TJ. "Micellar Catalysis of Organic Reactions. XXXI. A Study of the Effects of Micelles of Cetyltrimethylammonium Bromide on Some SNAr Reactions in Aqueous Binary Mixtures." Australian Journal of Chemistry 44, no. 5 (1991): 667. http://dx.doi.org/10.1071/ch9910667.

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The effect of micelles of cetyltrimethylammonium bromide ( ctab ) on the SNAr reactions of 1-fluoro-2,4-dinitrobenzene (1), 2-fluoro-5-nitrobenzoate (2) and 4-fluoro-3-nitrobenzoate (3) with sodium hydroxide in aqueous binary mixtures with several alcohols has been studied. Two products were detected in all of these reactions: the phenol from reaction with hydroxide ions, and an aryl alkyl ether from reaction with the alkoxide ions. Micelles of ctab increased the percentage yield of the ether product at the expense of the phenol for compounds (1) and (2) in most of the binary mixtures used. Fo

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7

Serratrice, Guy, Marie-José Stebe, and Jean-Jacques Delpuech. "Étude par RMN du carbone-13 de solutions de tensioactifs fluorés non- ioniques de type perfluoroalkylethylthiopolyethyleneoxy alcool." Journal de Chimie Physique 85 (1988): 875–80. http://dx.doi.org/10.1051/jcp/1988850875.

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8

Fujita, Takeshi, Ryutaro Morioka, Tomohiro Arita, and Junji Ichikawa. "sp3 carbon–fluorine bond activation in 2,2-difluorohomoallylic alcohols via nucleophilic 5-endo-trig cyclisation: synthesis of 3-fluorinated furan derivatives." Chemical Communications 54, no. 92 (2018): 12938–41. http://dx.doi.org/10.1039/c8cc04643c.

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9

Fustero, Santos, Daniel M. Sedgwick, Raquel Román, and Pablo Barrio. "Recent advances in the synthesis of functionalised monofluorinated compounds." Chemical Communications 54, no. 70 (2018): 9706–25. http://dx.doi.org/10.1039/c8cc05181j.

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Over the past few years, we have tackled the synthesis of interesting monofluorinated organic molecules, such as: dihydronaphthalene derivatives, β-fluoro sulfones and related carbonyl compounds, fluorohydrins and allylic alcohols.

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10

Krogh, Erik, and Peter Wan. "Photosolvolysis of 11H-benzo[b]fluoren-11-ol in aqueous solution." Canadian Journal of Chemistry 68, no. 10 (1990): 1725–31. http://dx.doi.org/10.1139/v90-268.

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The photosolvolysis of 11H-benzo[b]fluoren-11-ol (2), a 9-fluorenol derivative, has been studied in aqueous solution to test the hypothesis of enhanced photosolvolytic reactivity of these compounds. It is found that compared to the model compound, α-phenyl-2-naphthalenemethanol (3), 2 exhibited enhanced photosolvolytic reactivity. Quantum yields for photosolvolysis in aqueous alcohol solutions and steady-state and transient fluorescence studies are reported in neutral and acid solutions. The results further support the notion that an intrinsically accelerated photodehydroxylation step is assoc

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11

Mukherjee, Tathagata, Soumik Biswas, Andreas Ehnbom, et al. "Syntheses, structures, and stabilities of aliphatic and aromatic fluorous iodine(I) and iodine(III) compounds: the role of iodine Lewis basicity." Beilstein Journal of Organic Chemistry 13 (November 23, 2017): 2486–501. http://dx.doi.org/10.3762/bjoc.13.246.

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The title molecules are sought in connection with various synthetic applications. The aliphatic fluorous alcohols Rf n CH2OH (Rf n = CF3(CF2) n –1; n = 11, 13, 15) are converted to the triflates Rf n CH2OTf (Tf2O, pyridine; 22–61%) and then to Rf n CH2I (NaI, acetone; 58–69%). Subsequent reactions with NaOCl/HCl give iodine(III) dichlorides Rf n CH2ICl2 (n = 11, 13; 33–81%), which slowly evolve Cl2. The ethereal fluorous alcohols CF3CF2CF2O(CF(CF3)CF2O) x CF(CF3)CH2OH (x = 2–5) are similarly converted to triflates and then to iodides, but efforts to generate the corresponding dichlorides fail.

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12

Sheng, Jie Zhen, and Li Hong Bai. "Three-Anti Finishing for PLA Spunlace Non-Woven Fabrics." Advanced Materials Research 332-334 (September 2011): 1243–46. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1243.

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The purpose of this paper was to treat the PLA spunlaced non-wovens by finishing agents of organic fluorin FG-910, measure the properties of resistance to water, alcohol and blood of the fabrics by using different test methods. The experimental results show that PLA spunlaced non-wovens treated by FG-910 have excellent resistance to water, alcohol and blood,furthermore, there are no harmful effects on their strength,breathability,moisture permeability.

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13

Kysilka, Ondřej, Markéta Rybáčková, Martin Skalický, Magdalena Kvíčalová, Josef Cvačka, and Jaroslav Kvíčala. "HFPO Trimer-Based Alkyl Triflate, a Novel Building Block for Fluorous Chemistry. Preparation, Reactions and 19F gCOSY Analysis." Collection of Czechoslovak Chemical Communications 73, no. 12 (2008): 1799–813. http://dx.doi.org/10.1135/cccc20081799.

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Triflate 4, CF3(CF2)2O-CF(CF3)CF2O-CF(CF3)CH2-OTf (RFOCH2OTf), of the HFPO trimer-based alcohol 3 (RFOCH2OH) is a novel highly fluorinated building block for fluorous chemistry. In analogy to similar polyfluorinated triflates with methylene spacer, its reactivity is limited to strong and soft nucleophiles. Whereas reactions with cyanide anion, phenolate anion, enolate of diethyl malonate or lithium salt of benzaldehyde bis(phenylsulfanyl)acetal were unsuccessful, the corresponding imidazole 5, iodide 6 or azide 7 were prepared in good yields. Reaction of imidazole 5 with (perfluorohexyl)methyl

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14

Hernández, Karla, Paula Martinell, Cosette Reyes, and Milagros Méndez. "¿La exposición crónica al alcohol induce neurodegeneración en el Sistema Nervioso Central de la rata?" Salud mental 38, no. 3 (2015): 167–76. http://dx.doi.org/10.17711/sm.0185-3325.2015.024.

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Resumen Antecedentes. La exposición crónica al alcohol se asocia con procesos neurotóxicos y neurodegenerativos relacionados con disfunciones cognitivas y de memoria. El daño inducido por alcohol depende de los patrones de consumo de etanol. La exposición prolongada al alcohol induce daño en distintas regiones cerebrales (cortezas prefrontal, perirrinal, entorrinal y parahipocampal, tálamo, hipotálamo, hipocampo y cerebelo) en pacientes alcohólicos y modelos animales de alcoholismo. Sin embargo, no se han estudiado las regiones cerebrales asociadas con el circuito de reforzamiento y recompensa

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15

Klun, Jerome A., Ashot P. Khrimian та James E. Oliver. "Evidence of Pheromone Catabolism Via β-Oxidation in the European Corn Borer (Lepidoptera: Crambidae)". Journal of Entomological Science 33, № 4 (1998): 400–406. http://dx.doi.org/10.18474/0749-8004-33.4.400.

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Experiments were conducted using tritiated European corn borer, Ostrinia nubilalis (Hübner), pheromone, (Z)-[11,12-3H2]-11-tetradecen-1-ol acetate, a tritiated fluorinated analog of the European corn borer pheromone, 2-fluoro-(Z)-[11,12-3H2]-11-tetradecen-1-ol acetate, and methyl-4-bromocrotonate (MBC) to determine if pheromone catabolism proceeds on the moth's antennae via the β-oxidation pathway of fatty acid degradation. When antennae were treated with tritiated natural pheromone plus MBC (a precursor of the known β-oxidation inhibitor, 4-bromocrotonic acid), catabolism of the pheromone was

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16

Nguyen, Tung T., Nam T. S. Phan, Khang X. Nguyen, Duyen K. Nguyen, Phuc H. Pham, and Ha V. Le. "Sulfur-Mediated Decarboxylative Coupling of 2-Nitrobenzyl Alcohols and Arylacetic Acids." Synlett 31, no. 11 (2020): 1112–16. http://dx.doi.org/10.1055/s-0040-1707113.

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We report a new method for the synthesis of substituted quinazolines by the condensation of 2-nitrobenzyl alcohols with arylacetic acids. The transformation requires the use of urea as a nitrogen source, elemental sulfur as a promoter, DABCO as a base, and DMSO as a solvent. Functionalities such as chloro, fluoro, trifluoromethyl, thienyl, and indolyl groups were all compatible with the reaction conditions. Because our method uses stable simple substrates to obtain the N,N-heterocycles in the absence of transition metals, it offers a potential pathway for preparing complex structures under mil

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17

Mistry, Bhavnaben D., Kishor R. Desai, and Nigam J. Desai. "SYNTHESIS, IN VITRO ANTIMICROBIAL ACTIVITY OF SCHIFF’S BASE, AZETIDINONES AND THIAZOLIDINONES." International Journal of Current Pharmaceutical Research 9, no. 1 (2016): 126. http://dx.doi.org/10.22159/ijcpr.2017v9i1.16634.

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Objective: The objective of the present study is to synthesize 3-Chloro-4-[3-(2,4-dichloro-5-fluoro phenyl)-1H-pyrazol-4-yl]-1-(substituted) azetidin-2-one [4a-n] and 2-[3-(2,4-Dichloro-5-fluoro phenyl)-1H-pyraol-4-yl]-3-(substituted phenyl)-1,3-thiazolidin-4-one [5a-n]. The structure of all synthesized compounds were characterized by IR, 1H NMR, 13C NMR and mass spectral studies. Methods: The titled compounds 3-Chloro-4-[3-(2,4-dichloro-5-fluoro phenyl)-1H-pyrazol-4-yl]-1-(substituted) azetidin-2-one [4a-n] and 2-[3-(2,4-Dichloro-5-fluoro phenyl)-1H-pyraol-4-yl]-3-(substituted phenyl)-1,3-thi

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18

Naveen, Naganaboina, та Rengarajan Balamurugan. "Catalyst free synthesis of α-fluoro-β-hydroxy ketones/α-fluoro-ynols via electrophilic fluorination of tertiary propargyl alcohols using Selectfluor™ (F-TEDA-BF4)". Organic & Biomolecular Chemistry 15, № 9 (2017): 2063–72. http://dx.doi.org/10.1039/c7ob00140a.

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19

Zhang, Zhong Feng, Xian Yan Zhou, and Qing Zhi Ma. "Study on Biomedical Prospects of Benzene-Alcohol Extractives of Bamboo Leaves." Key Engineering Materials 467-469 (February 2011): 1706–10. http://dx.doi.org/10.4028/www.scientific.net/kem.467-469.1706.

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Bamboo leaves has been used to heal some diseases in the Chinese Folk for a long time. In order to explore the wide biomedicine utilization, the chemical components of benzene-alcohol extractives from the fresh bamboo leaves was studied by Py-GC/MS. The results indicated that the main components were decanoic acid, 1,2,3-propanetriyl ester(5.6%), 9-octadecyne(3.21%), tricosane (2.88%), .gamma.-sitosterol(2.81%), phenylpropionic acid,.alpha.-amin o-2-fluoro-4-hydroxy-5- methoxy-(2.76%), stigmastan-3,5-diene(2.69%), 4h-benzo[f]pyrrolo[1,2-a][1,4]diaz epine, 4-(2-phenyl -propyl)-5,6- dihydro-(2.6

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20

Kvíčala, Jaroslav, Tomáš Bříza, Oldřich Paleta, and Jan Čermák. "Synthesis of (Polyfluoroalkyl)cyclopentenes as Model Compounds for Fluorophilic Cyclopentadienes." Collection of Czechoslovak Chemical Communications 67, no. 9 (2002): 1345–58. http://dx.doi.org/10.1135/cccc20021345.

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Nucleophilic opening of the epoxide ring in 6-oxabicyclo[3.1.0]hexane (1) with ethenylmagnesium bromide was employed for the preparation of 2-ethenylcyclopentan-1-ol (2). Radical addition of perfluoroalkyl iodides 3 to alcohol 2 afforded (polyfluoroiodoalkyl)cyclopentanols 4, which were deiodinated with tributylstannane to (polyfluoroalkyl)cyclopentanols 5, followed by dehydration with Nafion-H to the target (polyfluoroalkyl)cyclopentenes 6, which are potential intermediates for fluorous chemistry. Attempts to synthesize (polyfluoroalkyl)cyclopentadienes or bis(polyfluoroalkyl)cyclopentadienes

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21

Otsuka, Takashi, Akihiro Ishii, Pavel A. Dub та Takao Ikariya. "Practical Selective Hydrogenation of α-Fluorinated Esters with Bifunctional Pincer-Type Ruthenium(II) Catalysts Leading to Fluorinated Alcohols or Fluoral Hemiacetals". Journal of the American Chemical Society 135, № 26 (2013): 9600–9603. http://dx.doi.org/10.1021/ja403852e.

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22

Issayeva, U. B., G. S. Akhmetova, U. M. Datkhayev, M. T. Omyrzakov, K. D. Praliyev, and S. A. Ross. "The Search for Biologically Active Compounds in the Series of N-ethoxyethylpiperidine Derivatives." Eurasian Chemico-Technological Journal 21, no. 2 (2019): 125. http://dx.doi.org/10.18321/ectj822.

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With the aim to introduce fragment of cyclopropane and fragments of p-, m-, o-fluorophenyls into the structures of N-ethoxyethylpiperidines, acylation of oxime and phenylacetylenic alcohol of 1-(2-ethoxyethyl)-4-ketopiperidine by cyclopropanecarbonylchloride was carried out; on the basis of 1-(2-ethoxyethyl)-4-ethynyl-4-hydroxypiperidine (cascaine alcohol), acylation by 4-fluoro-, 3-fluoro-, 2-fluorobenzoylchlorides was carried out with formation of the corresponding piperidine containing hydrochlorides of cyclopropanecarboxylic acid esters and para-, meta-, ortho-fluorobenzoic esters. Acylati

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23

Igwe, O. U., and D. E. Udofia. "Secondary Metabolites of the Cuticular Abdominal Glands of Variegated Grasshopper (Zonocerus variegatus L.)." International Journal of Spectroscopy 2015 (September 7, 2015): 1–6. http://dx.doi.org/10.1155/2015/901386.

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Chemical compounds were extracted with petroleum ether from the cuticular abdominal glands of grasshopper (Zonocerus variegatus L.) and eleven compounds were characterised using Gas Chromatography/Mass Spectrometry (GC/MS) technique in combination with Fourier Transform-Infrared Spectroscopy (FT-IR). The compounds analysed were 2,7-dimethyloctane (3.21%), decane (5.33%), undecane (3.81%), tridecanoic acid methyl ester (4.76%), hexadecanoic acid (9.37%), 11-octadecenoic acid methyl ester (23.18%), pentadecanoic acid, 14-methyl-methyl ester (4.43%), (Z)-13-docosenoic acid (10.71%), dodecyl penta

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24

Otsuka, Takashi, Akihiro Ishii, Pavel A. Dub та Takao Ikariya. "ChemInform Abstract: Practical Selective Hydrogenation of α-Fluorinated Esters with Bifunctional Pincer-Type Ruthenium(II) Catalysts Leading to Fluorinated Alcohols of Fluoral Hemiacetals." ChemInform 44, № 51 (2013): no. http://dx.doi.org/10.1002/chin.201351046.

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25

Smith, Peter James, and Jyotsna Pradhan. "Solvolysis of 2-substituted-9-(otrho-substituted phenylmethyl)fluoren-9-yltrimethylammonium ions in various solvents. The effect of steric crowding on alkene formation." Canadian Journal of Chemistry 64, no. 6 (1986): 1060–71. http://dx.doi.org/10.1139/v86-178.

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The solvolytic reaction of several 9-(ortho-substituted phenylmethyl)fluoren-9-yltrimethylammonium salts has been investigated in several different solvents. Substitution and elimination products were found for the reactions in all the solvents studied, with the exceptions that reaction in both tert-butyl alcohol and chloroform led exclusively to the alkene product. The observed rate constants for alkene formation and the percent alkene were measured and it was found that the di-ortho compounds reacted at a faster rate but produced less alkene than the reaction of the corresponding mono-ortho

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AKAJI, Kenichi, Hideo TANAKA, Hisatomi ITOH, et al. "Fluoren-9-ylmethyloxycarbonyl (Fmoc) amino acid chloride as an efficient reagent for anchoring Fmoc amino acid to 4-alkoxybenzyl alcohol resin." CHEMICAL & PHARMACEUTICAL BULLETIN 38, no. 12 (1990): 3471–72. http://dx.doi.org/10.1248/cpb.38.3471.

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27

Fang, Junfeng, Wenjun Zhang, Yuan Liu, and Chuluo Yang. "Synthesis of alcohol soluble hexakis(fluoren-2-yl)benzene based on phosphate groups and their application in inverted polymer solar cells." SCIENTIA SINICA Chimica 46, no. 5 (2016): 510–16. http://dx.doi.org/10.1360/n032015-00263.

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28

Schneider, Manuela, Beate Neumann, Hans-Georg Stammler, and Peter Jutzi. "Structure Determining Effect of Alcohols and Water on the Shape of the Hydrogen Bonded Network in Adducts with (9-Methyl-fluoren-9-yl)-silanetriol." Monatshefte für Chemie / Chemical Monthly 130, no. 1 (1999): 33–44. http://dx.doi.org/10.1007/pl00010173.

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Weingart, Eric, Sarah Tschirner, Linda Teevs, and Ulf Prüße. "Conversion of Fructose to HMF in a Continuous Fixed Bed Reactor with Outstanding Selectivity." Molecules 23, no. 7 (2018): 1802. http://dx.doi.org/10.3390/molecules23071802.

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5-Hydroxymethylfurfural (HMF) is a very promising component for bio-based plastics. Efficient synthesis of HMF from biomass is still challenging because of fast degradation of HMF to by-products under formation conditions. Therefore, different studies, conducted mainly in monophasic and biphasic batch systems with and without water addition have been published and are still under investigation. However, to produce HMF at a large scale, a continuous process is preferable. Until now, only a few studies have been published in this context. In this work, it is shown that fluorous alcohol hexafluor

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Tschirner, Sarah, Eric Weingart, Linda Teevs, and Ulf Prüße. "Catalytic Dehydration of Fructose to 5-Hydroxymethylfurfural (HMF) in Low-Boiling Solvent Hexafluoroisopropanol (HFIP)." Molecules 23, no. 8 (2018): 1866. http://dx.doi.org/10.3390/molecules23081866.

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A mixture of hexafluoroisopropanol (HFIP) and water was used as a new and unknown monophasic reaction solvent for fructose dehydration in order to produce HMF. HFIP is a low-boiling fluorous alcohol (b.p. 58 °C). Hence, HFIP can be recovered cost efficiently by distillation. Different ion-exchange resins were screened for the HFIP/water system in batch experiments. The best results were obtained for acidic macroporous ion-exchange resins, and high HMF yields up to 70% were achieved. The effects of various reaction conditions like initial fructose concentration, catalyst concentration, water co

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Okuzaki, Sachiko, Yuji Iwamoto, Koichi Kikuta, and Shin-ichi Hirano. "Synthesis and Properties of Chemically Modified Polycarbosilane Containing Organofluoric Groups." Journal of Materials Research 14, no. 4 (1999): 1353–58. http://dx.doi.org/10.1557/jmr.1999.0184.

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The chemically modified polycarbosilane (PC) containing organofluoric groups, PCOCF, was synthesized through chemical reaction of PC and fluoric alcohol. Pyrolysis of the polymer precursor occurred in three stages under 1000 °C. Weight loss due to evaporation of low molecular compounds was observed at the first stage below 300 °C, followed by the largest weight loss from 300 to 600 °C at the second stage. At this stage, side chains formed during the chemical reaction were removed. Finally, side chains such as Si–CH3 decomposed at the third stage above 600 °C. At 1000 °C, the chemical modificat

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32

Boeré, René T., and Christopher J. Willis. "Complexes of hybrid ligands. Pd2+ and Pt2+ complexes of new fluoro-alcohol thioether ligands; the use of thioether inversions to make structural assignments." Canadian Journal of Chemistry 63, no. 12 (1985): 3530–36. http://dx.doi.org/10.1139/v85-579.

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The fluorinated alcohol–thioethers RSCH2C(CF3)2OH (R = Me, Ph) have been synthesized by the reaction of RSCH2Li with (CF3)2CO. By ionization of the fluoroalcohol group, these may act as bidentate, uninegative, ligands L−. The presence of the soft thioether function in the hybrid ligand stabilizes the bond to the harder fluoro-alkoxy group, and complexes with soft transition metals are formed. Neutral complexes PdL2 and PtL2 have been synthesized, and, by the use of nmr, the geometry of the complexes is assigned as cis for Pt complexes, while both cis and trans are observed for Pd.The barrier t

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AKAJI, K., H. TANAKA, H. ITOH, et al. "ChemInform Abstract: Fluoren-9-ylmethyloxycarbonyl (Fmoc) Amino Acid Chloride as an Efficient Reagent for Anchoring Fmoc Amino Acid to 4-Alkoxybenzyl Alcohol Resin." ChemInform 22, no. 46 (2010): no. http://dx.doi.org/10.1002/chin.199146285.

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Yanase, Yuhki, Nicolas Carvou, Michael A. Frohman, and Shamshad Cockcroft. "Reversible bleb formation in mast cells stimulated with antigen is Ca2+/calmodulin-dependent and bleb size is regulated by ARF6." Biochemical Journal 425, no. 1 (2009): 179–93. http://dx.doi.org/10.1042/bj20091122.

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Mast cells stimulated with antigen undergo extensive changes in their cytoskeleton. In the present study, we assess the impact of actin-modifying drugs and report that, in the presence of cytochalasin D, mast cells stop membrane ruffling, but instead bleb. Bleb formation is reversible following washout of cytochalasin D and occurs in an actin-polymerization-dependent manner. Bleb formation is inhibited by expression of constitutively active ezrin-T567D. Blebbing is also inhibited by blebbistatin, a myosin II inhibitor, implying myosin II activation in the process. We used a selection of inhibi

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Smith, Peter James, Kanchugarakoppal S. Rangappa та Kenneth Charles Westaway. "Secondary α-deuterium kinetic isotope effects for the E2 reaction of the 2-phenylethyl halides with tert-butoxide ion in tert-butyl alcohol". Canadian Journal of Chemistry 63, № 1 (1985): 100–102. http://dx.doi.org/10.1139/v85-017.

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Secondary α-deuterium kinetic isotope effects have been determined for the elimination reactions of 2-phenylethyl halides with tert-butoxide in tert-butyl alcohol at 40 °C in the presence and absence of the crown ether 18C6. The second-order rate constant k2 and the normal (kH/kD)α effect remained constant when the tert-butoxide concentration was varied for reaction of the iodo and bromo compounds. However, both the magnitude of k2 and the secondary α-deuterium isotope effect were significantly dependent on [t-BuO−] when chlorine and fluorine are the leaving groups. It is noteworthy that (kH/k

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Bisaillon, Jean-Guy, François Lépine, Réjean Beaudet, and Michel Sylvestre. "Potential for carboxylation–dehydroxylation of phenolic compounds by a methanogenic consortium." Canadian Journal of Microbiology 39, no. 7 (1993): 642–48. http://dx.doi.org/10.1139/m93-093.

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An anaerobic consortium that carboxylated and dehydroxylated phenol to benzoate, and 2-cresol to 3-methylbenzoic acid, under methanogenic conditions was studied. Phenol induced this transformation activity. Addition of 4-hydroxypyridine or an increase in the concentration of proteose peptone to 0.5% (w/v) delayed the transformation. Phenol enhanced the rate of transformation of 2-cresol whereas 2-cresol delayed the transformation of phenol. Phenols with ortho-substitutions (chloro-, fluoro-, bromo-, hydroxyl-, amino-, or carboxyl-) were transformed to meta-substituted benzoic acids. However, m

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Schwartz, Leyah A., Michael Holmes, Gilmar A. Brito, et al. "Cyclometalated Iridium–PhanePhos Complexes Are Active Catalysts in Enantioselective Allene–Fluoral Reductive Coupling and Related Alcohol-Mediated Carbonyl Additions That Form Acyclic Quaternary Carbon Stereocenters." Journal of the American Chemical Society 141, no. 5 (2019): 2087–96. http://dx.doi.org/10.1021/jacs.8b11868.

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Akaji, Kenichi, Yoshiaki Kiso, and Louis A. Carpino. "Fmoc-based solid-phase peptide synthesis using a new t-alcohol type 4-(1′,1′-dimethyl-1′-hydroxypropyl)phenoxyacetyl handle (DHPP)–resin (Fmoc = fluoren-9-ylmethoxycarbonyl)." J. Chem. Soc., Chem. Commun., no. 7 (1990): 584–86. http://dx.doi.org/10.1039/c39900000584.

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Orlovskaya, Viktoriya V., Austin S. Craig, Olga S. Fedorova, et al. "Production of 6-l-[18F]Fluoro-m-tyrosine in an Automated Synthesis Module for 11C-Labeling." Molecules 26, no. 18 (2021): 5550. http://dx.doi.org/10.3390/molecules26185550.

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6-l-[18F]Fluoro-m-tyrosine (6-l-[18F]FMT) represents a valuable alternative to 6-l-[18F]FDOPA which is conventionally used for the diagnosis and staging of Parkinson’s disease. However, clinical applications of 6-l-[18F]FMT have been limited by the paucity of practical production methods for its automated production. Herein we describe the practical preparation of 6-l-[18F]FMT using alcohol-enhanced Cu-mediated radiofluorination of Bpin-substituted chiral Ni(II) complex in the presence of non-basic Bu4ONTf using a volatile iPrOH/MeCN mixture as reaction solvent. A simple and fast radiolabeling

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Jarczewski, Arnold, Grzegorz Schroeder, Wlodzimierz Galezowski, Kenneth T. Leffek, and Urszula Maciejewska. "The kinetics, isotope effects, and mechanism of the reaction of 2,2-di(4-nitrophenyl)-1,1,1-trifluoroethane with alkoxide bases in alcohol solvents." Canadian Journal of Chemistry 63, no. 3 (1985): 576–80. http://dx.doi.org/10.1139/v85-094.

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The reaction between 2,2-di(4-nitrophenyl)-1,1,1-trifluoroethane and the alkoxide bases ŌCH3, ŌC2H5, ŌnC4H9, ŌCH(CH3)2, and ŌC(CH3)3 in their corresponding alcohol solvents is a multistep reaction with several intermediates: 2,2-di(4-nitrophenyl)-1,1-difluoro-1-alkoxyethane (A), 2,2-di(4-nitrophenyl)-1-fluoro-1-alkoxyethene (B), 2,2-di(4-nitrophenyl)-1,1-dialkoxyethene (C), 2,2-di(4-nitrophenyl)-1,1-difluoroethene (D), and 4,4′-dinitrobenzophene (E). Rate constants and activation parameters have been measured for the appearance of the two stable products B and C. The kinetic deuterium isotope

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Hamzah, Mohd Syahir Anwar, Nurul Amira Ab Razak, Celine Ng, et al. "PREPARATION OF THE ELECTROSPUN POLYVINYLIDENE FLUORIDE / POLYVINYL ALCOHOL SCAFFOLD AS A POTENTIAL TISSUE REPLACEMENT." IIUM Engineering Journal 22, no. 1 (2021): 245–58. http://dx.doi.org/10.31436/iiumej.v22i1.1548.

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: Polyvinylidene fluoride (PVDF), a piezoelectric material, is commonly used in tissue engineering due to its potential for mimicking the electrical microenvironment of biological conditions for tissue development. In this present research, polyvinyl alcohol (PVA) was introduced into electrospun PVDF fabrication through an electrospinning process, aiming to enhance the nanofibrous membrane's biocompatibility properties by improving the hydrophilicity properties to act as an artificial tissue scaffold. The electrospun PVDF/PVA membranes are found to be optimum at a PVDF-to-PVA ratio of 90:10 du

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Mannhardt, Karin, J. J. Novosad, and L. L. Schramm. "Comparative Evaluation of Foam Stability to Oil." SPE Reservoir Evaluation & Engineering 3, no. 01 (2000): 23–34. http://dx.doi.org/10.2118/60686-pa.

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Summary Foam performance was evaluated by several experimental methods (corefloods, bulk foam stability, micromodel observations, interfacial parameters) using three commercial surfactants, either by themselves or mixed with a fluorinated surfactant. The presence of oil reduced foam mobility reduction factors (Fmr) to different degrees; excellent Fmr were still attained with some surfactants in the presence of residual oil. Using the fluorinated surfactant as additive enhanced the oil tolerance of some, but not all, foams. The tested foams exhibited oil transporting properties. Each foam adjus

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Mohabey, Hemlata. "IR Spectra, Magnetic and Thermal Studies of Copper (II) Complex of N-Hydroxy-N-(4-Chloro) Phenyl N’(4-Fluoro) Phenyl Benzamidine Hydrochloride." Material Science Research India 11, no. 1 (2014): 63–65. http://dx.doi.org/10.13005/msri/110108.

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Copper (II) reacts with HCPFPBH and forms buff coloured precipitate insoluble in many organic solvents like absolute alcohol, ether, benzene, chloroform etc. The Solid complex has molecular formula (C19H13N2OFCl)2Cu which melts at 2020C with decomposition. The infrared spectra of the complex was recorded in the range 4000-450cm-1. The ligand molecule consists of a weak band at 2550 cm-1. This confirms the presence of azomethine nitrogen in the ligand. This band is absent in the IR Spectrum of the complex confirming the involvement of this group in complexation . The strong band of the ligand a

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Sugita, Jun, Takeshi Yoneshiro, Takuya Hatano, et al. "Grains of paradise (Aframomum melegueta) extract activates brown adipose tissue and increases whole-body energy expenditure in men." British Journal of Nutrition 110, no. 4 (2013): 733–38. http://dx.doi.org/10.1017/s0007114512005715.

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Brown adipose tissue (BAT) is responsible for cold- and diet-induced thermogenesis, and thereby contributes to the control of whole-body energy expenditure (EE) and body fat content. BAT activity can be assessed by fluoro-2-deoxyglucose (FDG)-positron emission tomography (PET) in human subjects. Grains of paradise (GP, Aframomum melegueta), a species of the ginger family, contain pungent, aromatic ketones such as 6-paradol, 6-gingerol and 6-shogaol. An alcohol extract of GP seeds and 6-paradol are known to activate BAT thermogenesis in small rodents. The present study aimed to examine the effe

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Sona Khan, Muhammad, Wulfran Trenet, Nancy Xing, et al. "A Novel Sulfonamide, 4-FS, Reduces Ethanol Drinking and Physical Withdrawal Associated With Ethanol Dependence." International Journal of Molecular Sciences 21, no. 12 (2020): 4411. http://dx.doi.org/10.3390/ijms21124411.

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Carbonic anhydrase (CA) is abundant in glial cells in the brain and CA type II isoform (CA II) activity in the hippocampus plays an important role in buffering extracellular pH transients produced by neural activity. Chronic ethanol exposure results in respiratory and metabolic acidosis, producing shifts in extracellular pH in the brain and body. These neurophysiological changes by ethanol are hypothesized to contribute to the continued drinking behavior and physical withdrawal behavior in subjects consuming ethanol chronically. We explored whether chronic ethanol self-administration (ethanol

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Sha, Fanrui, and Adam R. Johnson. "4-Fluoro-2-({[(2R)-1-hydroxy-1,1,3-triphenylpropan-2-yl]imino}methyl)phenol." IUCrData 5, no. 12 (2020). http://dx.doi.org/10.1107/s2414314620015801.

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The title compound, C28H24FNO2, crystallizes in the orthorhombic space group P212121. A hydrogen-bonding network between the tertiary alcohol group and the fluoro substituent results in [010] chains in the solid state.

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George, Akash, Kennedy Richardson, Yuankun Zhai, Suresh C. Tyagi, and Neetu Tyagi. "Abstract P116: Exercise Ameliorated Cognitive Impairment Through ER Stress Mitigation in Alcohol Treated Exercise Ameliorated Cognitive Impairment Through Er Stress Mitigation in Alcohol Treated C57bl/6 Male Mice." Hypertension 68, suppl_1 (2016). http://dx.doi.org/10.1161/hyp.68.suppl_1.p116.

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Alcohol consumption is a potent inducer of oxidative stress (OS). Oxidative stress cause disturbance of endoplasmic reticulum (ER) homeostasis, that triggers ER stress (ERS), cause neuronal damage in the brain. Our Previous data indicate that Alcohol consumption induces mitochondrial dysfunction and free radical production in mouse cerebral cortex. Exercise has been recommended by clinicians as a secondary protective therapy; however, its effect on brain functions through ER stress has not been fully explored. Therefore, we hypothesized that exercise improves Alcohol-induced neurodegeneration

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Singh, Rajinder, and Spriha Sharma. "Forensic Analysis of Wild Toxic and Edible Amanita Mushrooms by Gas Chromatography- Mass Spectrometry." 99 3, no. 1 (2021). http://dx.doi.org/10.26735/mibz2886.

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For many years, the foraging and consumption of wild mushrooms has been practised in different parts of the world. Despite having various health benefits, few mushroom species are known for causing toxicity as well. In forensic casework conditions, samples from mushroom poisoning cases can be found in dried or powdered form. So, it becomes necessary to characterize mushroom species for identification purposes. In the present study, volatile fractions of five wild toxic and edible Amanita mushroom species (Amanita muscaria, Amanita pantherina, Amanita caesarea, Amanita subglobosa and Amanita po

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AKAJI, K., Y. KISO, and L. A. CARPINO. "ChemInform Abstract: Fmoc-Based Solid-Phase Peptide Synthesis Using a New t-Alcohol Type 4-(1′,1′-Dimethyl-1′-hydroxypropyl)phenoxyacetyl Handle (DHPP)-Resin (Fmoc = Fluoren-9-ylmethoxycarbonyl)." ChemInform 21, no. 41 (1990). http://dx.doi.org/10.1002/chin.199041305.

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Tella, Josephine Oluwagbemisola, and Saheed Oluwasina Oseni. "Comparative Profiling of Solvent-mediated Phytochemical Expressions in Ocimum gratissimum and Vernonia amygdalina Leaf Tissues via FTIR Spectroscopy and Colorimetric Assays." Journal of Advances in Medical and Pharmaceutical Sciences, March 4, 2019, 1–25. http://dx.doi.org/10.9734/jamps/2018/v19i430095.

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Objective: The beneficial role of extraction solvents is often ignored, yet very important in enhancing the therapeutic potential of plant extracts. This study was carried out to comparatively characterize and profile the bioactive phytochemical compounds expressed in different solvent-fractions of Ocimum gratissimum and Vernonia amygdalina leaf extracts using both colorimetric phytochemical screening assays and Fourier transform infrared (FTIR) spectroscopy. Methods: Qualitative colorimetric assays were carried out on different solvent-fractions of leaf tissue extracts from both plants

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