Results 31 to 40 of about 5,406 (201)

Multicomponent Synthesis of Potentially Biologically Active Heterocycles Containing a Phosphonate or a Phosphine Oxide Moiety

Acta Chimica Slovenica, 2022
Several multicomponent synthetic approaches were elaborated for plenty of novel nitrogen or oxygen heterocycles containing a phosphonate or a phosphine oxide moiety.
Nóra Popovics-Tóth, Erika Bálint
doaj   +1 more source

Multicomponent reactions: A simple and efficient route to heterocyclic phosphonates

Beilstein Journal of Organic Chemistry, 2016
Multicomponent reactions (MCRs) are one of the most important processes for the preparation of highly functionalized organic compounds in modern synthetic chemistry. As shown in this review, they play an important role in organophosphorus chemistry where
Mohammad Haji
doaj   +1 more source

Stoichiometric and Catalytic Synthesis of Alkynylphosphines

Molecules, 2012
Alkynylphosphines or their borane complexes are available either through C–P bond forming reactions or through modification of the phosphorus or the alkynyl function of various alkynyl phosphorus derivatives.
Annie-Claude Gaumont, Carole Alayrac, Romain Veillard, Elise Bernoud   +3 more
doaj   +1 more source

Nanomaterials with Excellent Adsorption Characteristics for Sample Pretreatment: A Review

Nanomaterials, 2022
Sample pretreatment in analytical chemistry is critical, and the selection of materials for sample pretreatment is a key factor for high enrichment ability, good practicality, and satisfactory recoveries. In this review, the recent progress of the sample
Wen-Xin Liu, Shuang Song, Ming-Li Ye, Yan Zhu, Yong-Gang Zhao, Yin Lu   +5 more
doaj   +1 more source

Prebiotic Syntheses of Organophosphorus Compounds from Reduced Source of Phosphorus in Non-Aqueous Solvents

Life, 2023
Reduced-oxidation-state phosphorus (reduced P, hereafter) compounds were likely available on the early Earth via meteorites or through various geologic processes.
Maheen Gull, Tian Feng, Benjamin Smith, Laurent Calcul, Matthew A. Pasek   +4 more
doaj   +1 more source

Polyphosphorus Ligand Complexes of Coinage Metals for Multiple Capturing of Intact P4 Tetrahedra

Angewandte Chemie, EarlyView.
Self‐assembly reactions of [CpRFe(η5‐P5)] (CpR = C5(CH3)5 and C5(4‐EtC6H4)5) with coinage metal salts and white phosphorus afforded an unprecedented novel class of mixed polyphosphorus ligand complexes in which metal ions multiply coordinate intact P4 tetrahedra.
Claudia Göschl, Eugenia Peresypkina, Barbara Hiltl, Alexander V. Virovets, Gabor Balázs, Manfred Scheer   +5 more
wiley   +2 more sources

First DMAP-mediated direct conversion of Morita–Baylis–Hillman alcohols into γ-ketoallylphosphonates: Synthesis of γ-aminoallylphosphonates

Beilstein Journal of Organic Chemistry, 2016
An efficient synthesis of a series of γ-ketoallylphosphonates through a direct conversion of both primary and secondary Morita–Baylis–Hillman (MBH) alcohols by trialkyl phosphites with or without DMAP, used as additive, and under solvent-free conditions,
Marwa Ayadi, Haitham Elleuch, Emmanuel Vrancken, Farhat Rezgui   +3 more
doaj   +1 more source

Analysis of Organophosphorus-Based Nerve Agent Degradation Products by Gas Chromatography-Mass Spectrometry (GC-MS): Current Derivatization Reactions in the Analytical Chemist’s Toolbox

Molecules, 2021
The field of gas chromatography-mass spectrometry (GC-MS) in the analysis of chemical warfare agents (CWAs), specifically those involving the organophosphorus-based nerve agents (OPNAs), is a continually evolving and dynamic area of research.
Carlos A. Valdez, Roald N. Leif
doaj   +1 more source

Reaction of 3-Amino-1,2,4-Triazole with Diethyl Phosphite and Triethyl Orthoformate: Acid-Base Properties and Antiosteoporotic Activities of the Products

Molecules, 2017
The reaction of diethyl phosphite with triethyl orthoformate and a primary amine followed by hydrolysis is presented, and the reaction was suitable for the preparation of (aminomethylene)bisphosphonates.
Patrycja Miszczyk, Dorota Wieczorek, Joanna Gałęzowska, Błażej Dziuk, Joanna Wietrzyk, Ewa Chmielewska   +5 more
doaj   +1 more source

Fast and Environment-Friendly GC-MS Method for Eleven Organophosphorus Flame Retardants in Indoor Air, Dust, and Skin Wipes

Toxics, 2021
Organophosphorus based flame retardants (OPFRs) extensively used as alternatives to banned polybrominated diphenyl ethers and hexabromocyclododecane have been garnering interest due to the possibility that these compounds may have less significant impact
Chung-Yu Chen, Yu-Hsuan Liu, Chia-Hui Chieh, Wei-Hsiang Chang   +3 more
doaj   +1 more source