A simple azine-linked covalent organic framework (COF) with high thermal and chemical stabilities has been prepared by using deep eutectic solvent (DES) as green media. The as-synthesized COF was employed as heterogeneous ligand for immobilization of PdII. The obtained Pd-supported COF nanoparticles catalyst (defined as Pd/TFPT-Azine-COF) was found to be an efficient heterogeneouscatalyst for the
Potassium and sodium salts of diphenylphosphine add to nitroarenes in the position ortho and para to the nitro group. Subsequent oxidation of σ H -adducts with potassium permanganate gave diphenyl(nitroaryl)phosphine oxides.
二苯基膦的钾盐和钠盐在硝基的邻位和对位加成到硝基芳烃上。随后用高锰酸钾氧化 σ H -加合物得到二苯基(硝基芳基)氧化膦。
Electron Donor‐Acceptor Complex Initiated Photochemical Phosphorus Arylation with Diaryliodonium Salts toward the Synthesis of Phosphine Oxides
作者:Dmitry I. Bugaenko、Alexander V. Karchava
DOI:10.1002/adsc.202300351
日期:2023.6.13
blue light irradiation followed by oxidative P−N bond cleavage in the in situ generated amino phosphonium salts under hydrolytic conditions represent a method for the synthesis of substituted arylphosphine oxides, arylphosphinic and arylphosphonic amides respectively. The proposed approach is based on using visible light as the only promoter for the C−Pbondformation, accommodates a variety of functional
A new method for copper-catalyzed P-C bond formation through reaction of phosphorus nucleophiles with diaryliodonium salts at room temperature is described. Most target products are obtained with this method in high yields within a short reaction time of 10 min. It can be easily adapted to large-scale preparations. When unsymmetrical iodonium salts are employed, nucleophilic substitution occurs preferentially on the sterically hindered aromatic ring or the more electron-deficient ring.