Feldmann, Kai-Oliver published the artcileA versatile protocol for the quantitative and smooth conversion of phosphane oxides into synthetically useful pyrazolylphosphonium salts, HPLC of Formula: 4141-48-4, the publication is ChemSusChem (2011), 4(12), 1805-1812, database is CAplus and MEDLINE.
A convenient protocol for the smooth conversion of the resistant P:O bond in phosphane oxides R2R1P:O into a reactive P-N bond of synthetically useful pyrazolylphosphonium salts is described. A highly charged, oxophilic, phosphorus-centered trication [P2(¦Ì-3,5-Me2Pz)3][OTf]3 (1, 3,5-Me2Pz = 3,5-dimethyl-1-pyrazolyl-N,N’) is employed as a deoxygenating reagent, and the reactions are conducted at room temperature with quant. yields. The resulting pyrazolylphosphonium cations [R2R1P(3,5-Me2Pz)][OTf] (3a–g, R = Ph, Et, Bu; R2 = CH:CMeCH2CH2; R1 = Ph, Me, Et, CH2CH:CH2) are valuable synthetic intermediates and are used for the synthesis of a variety of organophosphorus compounds Protonation of 3a facilitates P-N-bond cleavage and reduction or substitution reactions. Triphenylphosphine may be obtained by electrochem. or LiAlH4 reduction of 3a. Alkylation of 3a with BuLi gave the phosphonium ylide, Ph3P:CHPr, which was used in Wittig olefination of 2-nitrobenzaldehyde. This represents a new approach towards the transformation of the rather inert phosphoryl group under very mild reaction and workup conditions and aims towards alternatives to existing reduction methods for phosphane oxide functionalization.
ChemSusChem published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C15H15OP, HPLC of Formula: 4141-48-4.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia