Application of 78871-05-3, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.78871-05-3, Name is Di(naphthalen-2-yl)phosphine oxide, molecular formula is C20H15OP. In a patent, introducing its new discovery.
A phosphenium-cation-mediated formal [3+2]-cycloaddition reaction of internal alkynes is reported. The reaction proceeds under metal-free conditions to give the corresponding C?P rearranged benzophospholes regioselectively, even when ortho- and para-substituted arylphosphine oxides are starting substrates. Mechanistic studies by 31P{1H} NMR analysis suggest an involvement of three-membered phosphirenium cation species and C?P rearrangement prior to a ring closure for benzophosphole skeleton formation.
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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate