Research Progress of Vinyl/Aryl Phosphonium Salts in Organic Synthesis

Phosphines have attracted much attention as efficient ligands, catalysts or stoichiometric reductants in organic synthesis. However, the application of phosphonium salts, as a kind of important derivatives of phosphines, has focused on Wittig reaction, Staudinger reaction or other reactions as intermediates. With the rapid development of new methods, the introdcution of vinyl/aryl groups not only makes a considerable progress in the applications of vinyllaryl phosphonium salts, but provides novel strategies for the synthesis of bioactive or pharmaceutical molecules. The review is summarized based on the types of phosphonium salts and reactions to construct vinyl/aryl groups in recent years.