Results 21 to 30 of about 18,546 (204)

Highly Diastereoselective Construction of Carbon– Heteroatom Quaternary Stereogenic Centers in the Synthesis of Analogs of Bioactive Compounds: From Monofluorinated Epoxyalkylphosphonates to α-Fluoro-, β-, or γ-Amino Alcohol Derivatives of Alkylphosphonates

Frontiers in Chemistry, 2021
The synthesis of the stable surrogates of an important amino acid (R)-4-amino-3-hydroxybutyric acid (GABOB) such as substituted hydroxy aminophosphonic acids bearing a quaternary stereogenic center is presented.
Magdalena Rapp, Klaudia Margas-Musielak, Patrycja Kaczmarek, Agnieszka Witkowska, Tomasz Cytlak, Tomasz Cytlak, Tomasz Siodła, Henryk Koroniak   +7 more
doaj   +1 more source

Synthesis and characterisation of ferrocenyl-phosphonic and -arsonic [PDF]

, 2001
The ferrocene-derived acids FcCH₂CH₂E(O)(OH)₂ [4, E=P; 10, E=As; Fc=Fe(η₅-C₅H₅)(η⁵-C₅H₄)] have been synthesized by the reaction of FcCH₂CH₂Br with either P(OEt)₃ followed by hydrolysis, or with sodium arsenite followed by acidification.
Alley, Steven R., Henderson, William
core   +2 more sources

Nanocomposites and methods for synthesis and use thereof [PDF]

, 2009
Nanocomposite compositions and methods of synthesis of the compositions are described. In particular, liquid crystal-functionalized nanoparticles, liquid crystal-templated nanoparticles, nanocomposite compositions including the nanoparticles, and ...
Furman, Benjamin R., Rawls, H. Ralph, Thompson, Paul M., Wellinghoff, Stephen T.   +3 more
core   +1 more source

Surface Modification of SnO2 with Phosphonic Acids

Journal of Chemistry, 2017
The aim of the present work was the study of phosphonic acids grafting on the surface of SnO2 at different molar ratios. In this paper we describe the functionalization of SnO2 surfaces with phosphonic acids RPO(OH)2. The surface modification process was
Ramona Gheonea, Carmen Mak, Eleonora Cornelia Crasmareanu, Vasile Simulescu, Nicoleta Plesu, Gheorghe Ilia   +5 more
doaj   +1 more source

Monitoring Exposure to Five Chemical Warfare Agents Using the Dried Urine Spot Technique and Liquid Chromatography-Mass Spectrometry/Mass Spectrometry—In Vivo Determination of Sarin Metabolite in Mice

Molecules, 2023
Dried urine spot (DUS) is a micro-sample collection technique, known for its advantages in handling, storage and shipping. It also uses only a small volume of urine, an essential consideration in working with small animals, or in acute medical situations.
Lilach Yishai Aviram, Shai Dagan, Ariel Hindi, Shira Chapman, Rellie Gez, Eyal Drug   +5 more
doaj   +1 more source

Laser production of gas phase complexes of metal α-aminophosphonic acid mixtures and their role in chiral recognition

International Journal of Photoenergy, 2001
Clusters between first-group metal ions and chiral α-aminophosphonic acids have been readily generated by Pulsed Laser Ablation (PLA) and by Electrospray Ionization (ESI) and their fragmentation investigated by mass spectrometry.
A. Paladini, C. Calcagni, T. Di. Palma, M. Satta, M. Speranza, D. Scuderi, A. Laganà, G. Fago, A. Giardini Guidoni   +8 more
doaj   +1 more source

One-Pot Phosphonylation of Heteroaromatic Lithium Reagents: The Scope and Limitations of Its Use for the Synthesis of Heteroaromatic Phosphonates

Molecules, 2023
A one-pot lithiation–phosphonylation procedure was elaborated as a method to prepare heteroaromatic phosphonic acids. It relied on the direct lithiation of heteroaromatics followed by phosphonylation with diethyl chlorophosphite and then oxidation with ...
Ewa Chmielewska, Natalia Miodowska, Błażej Dziuk, Mateusz Psurski, Paweł Kafarski   +4 more
doaj   +1 more source

Interaction of solid organic acids with carbon nanotube field effect transistors [PDF]

, 2006
A series of solid organic acids were used to p-dope carbon nanotubes. The extent of doping is shown to be dependent on the pKa value of the acids. Highly fluorinated carboxylic acids and sulfonic acids are very effective in shifting the threshold voltage
Ali Afzali, Anantram, Avouris, Bradley, Chen, Christian Klinke, Collins, Covington, Derycke, Dukovic, Eberson, Freedman, Fuhrer, Heinze, Kazaoui, Kim, Klinke, Klinke, Mann, Martel, Martel, McBee, O’Connell, Phaedon Avouris, Radosavljevic, Shimauchi, Strano, Tans, Ventura   +28 more
core   +1 more source

Synthesis of phosphonic acid ligands for nanocrystal surface functionalization and solution processed memristors [PDF]

, 2018
Here, we synthesized 2-ethylhexyl, 2-hexyldecyl, 2-[2-(2-methoxyethoxy)ethoxy]ethyl, oleyl, and n-octadecyl phosphonic acid and used them to functionalize CdSe and HfO2 nanocrystals.
Crosby, Alfred J, De Roo, Jonathan, Deblock, Loren, Nonnenmann, Stephen S, Owen, Jonathan S, Wang, Jiaying, Zhou, Zimu   +6 more
core   +5 more sources

NH-Polyfluoroalkyl іminophosphonates in the synthesis of α-amino-α-polyfluoroalkyl-γ-oxobutylphosphonic acids

Журнал органічної та фармацевтичної хімії, 2019
Aim. To develop the preparative method for the synthesis of optically active α-amino-α-polyfluoroalkyl-γ-oxobutylphosphonic acids as new promising chiral building blocks. Results and discussion.
O. V. Stanko, Y. P. Yelenich, P. P. Onys’ko, Yu. V. Rassukana   +3 more
doaj   +1 more source