Results 31 to 40 of about 5,987 (170)

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

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

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

Synthesis of Fused sp3‐Enriched Imidazoles

ChemistryOpen
A synthetic approach to imidazoles annulated to saturated six‐membered cycles featuring S, SO2, NH, NCbz was developed. It was achieved by combining the Neber rearrangement and the Marckwald reaction.
Viacheslav Lysenko, Anton Portiankin, Tetiana Shvydenko, Svitlana Shishkina, Kostiantyn Nazarenko, Aleksandr Kostyuk   +5 more
doaj   +1 more source

Donor‐Substituted C(sp3)‐Bridged Phosphorus‐Heterotriangulenes as Blue Thermally Activated Delayed Fluorescence Emitters

Advanced Optical Materials, EarlyView.
The newly developed regioselective strategy for the para‐functionalization of C(sp3)‐bridged phosphorus‐centered heterotriangulene delivers a series of donor‐acceptor emitters exhibiting thermally activated delayed fluorescence. The carbazole‐substituted compounds feature a unique combination of high photoluminescence quantum yields up to 75%, deep ...
Maximilian Schöner, Angelina Jocic, Siegfried Harrer, Mahni Fatahi, Jonas Maurmann, Andrea Reule, Frank Rominger, Eli Zysman‐Colman, Milan Kivala   +8 more
wiley   +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

Nanozymes Integrated Biochips Toward Smart Detection System

Advanced Science, EarlyView.
This review systematically outlines the integration of nanozymes, biochips, and artificial intelligence (AI) for intelligent biosensing. It details how their convergence enhances signal amplification, enables portable detection, and improves data interpretation.
Dongyu Chen, Wang Zheng, Zhihui Zhang, Shenping Yu, Xinxin Hang, Han Wu, Xiao‐Wei Xiang, Wei Mu, Yanli Jiao, Zaizai Dong, Lingqian Chang   +10 more
wiley   +1 more source

Preparation of phosphines through C–P bond formation

Beilstein Journal of Organic Chemistry, 2014
Phosphines are an important class of ligands in the field of metal-catalysis. This has spurred the development of new routes toward functionalized phosphines.
Iris Wauters, Wouter Debrouwer, Christian V. Stevens   +2 more
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