2065-67-0Relevant articles and documents
Arylation of red phosphorus: A new way to triphenylphosphine oxide and triphenylphosphine
Cristau, Henri-Jean,Pascal, Jeanick,Plenat, Francoise
, p. 5463 - 5466 (1990)
Nickel bromide catalyses the arylation of amorphous red phosphorus. This provides a new way to triphenylphosphine oxide and triphenylphosphine.
A comparative electrochemical study on corrosion inhibition of iron by synthesized tetraphenyl phosphonuim iodide in acid media
Mansouri, Khaled,Sekhri, Lakhdar,Rahim, Oumelkheir,Tabchouche, Ahmed
, p. 2015 - 2025 (2016)
The present work is aimed mainly to synthesize a phosphonuim salt, tetraphenylphosphonuim iodide, and evaluate inhibitive effect against carbon steel corrosion in aerated 1 M HCl solutions. Thus, tetraphenylphosphonuim iodide was synthesized by the reaction of of an equimolar quantity of a solution of phenyl iodide and triphenyl phosphine in toluene (84% yield). We have found that, the use of toluene for this reaction of triphenyl phosphine with aryl or alkyl iodide is a convenient synthesis of many phosphonium salts since the halogen as a leaving group (requires a temperature higher than boiling point of chloroform.The purity of this compound was estimated by TLC technique and microanalysis, while its structure was supported by the usual spectroscopic methods such as UV, infrared, 1H. NMR and 13C. NMR. Exploration of the Corrosion measurements based on polarization resistance (Rp), potentiodynamic polarization curves indicates that tetraphenylphosphonuim iodide, in most cases act as strong inhibitors. Tetraphenylphosphonuim iodide acts as anodic type inhibitors with predominant effect on the anodic dissolution of iron. Analysis of the polarization curves indicates that charge transfer process mainly controls carbon steel corrosion in HCl solution without and with phosphonuim salt. The mechanism of corrosion inhibition by phosphonuim; salt was discussed in the light of the molecular structure of the additive. A Comparative electrochemical study with that reported in the literature revealed that the efficiency of the inhibitors follows the order: tetraphenyl phosphonum iodide >(chloromethyl) triphenyl phosphonium chloride (CTP) > tetraphenyl phosphonum chloride (TP) > triphenyl phosphine oxide (TPO) > triphenyl (phenylmethyl) phosphonium chloride (TPM).
Continuous synthesis method of tetraphenylphosphinophenylphenol salt
-
Paragraph 0022; 0035-0036, (2021/09/01)
The method uses triphenylphosphine, halogenated benzene and phenol as raw materials, and the sodium hydroxide solution is an acid binding agent. The preparation method comprises the following steps: triphenylphosphine. The halogenated benzene and the reaction solvent are mixed in a continuous flow reactor to prepare a tetraphenylhalogenated phosphine solution, a prepared tetraphenylhalogenated phosphine solution, phenol and sodium hydroxide solution with a concentration 32% are mixed in a continuous flow reactor to prepare a tetraphenylphosphine phenol salt. Compared with a conventional stirred tank reactor, the reactor used in the preparation method is smaller in size, simple to operate, continuous in reaction, high in yield, environmentally friendly, stable in pH value during reaction, relatively mild in reaction conditions and stable in prepared tetraphenylphenol salt.
Versatile Visible-Light-Driven Synthesis of Asymmetrical Phosphines and Phosphonium Salts
Arockiam, Percia Beatrice,Lennert, Ulrich,Graf, Christina,Rothfelder, Robin,Scott, Daniel J.,Fischer, Tillmann G.,Zeitler, Kirsten,Wolf, Robert
supporting information, p. 16374 - 16382 (2020/11/03)
Asymmetrically substituted tertiary phosphines and quaternary phosphonium salts are used extensively in applications throughout industry and academia. Despite their significance, classical methods to synthesize such compounds often demand either harsh reaction conditions, prefunctionalization of starting materials, highly sensitive organometallic reagents, or expensive transition-metal catalysts. Mild, practical methods thus remain elusive, despite being of great current interest. Herein, we describe a visible-light-driven method to form these products from secondary and primary phosphines. Using an inexpensive organic photocatalyst and blue-light irradiation, arylphosphines can be both alkylated and arylated using commercially available organohalides. In addition, the same organocatalyst can be used to transform white phosphorus (P4) directly into symmetrical aryl phosphines and phosphonium salts in a single reaction step, which has previously only been possible using precious metal catalysis.