Enantioselective Deprotonation as a Vehicle for the Asymmetric Synthesis of C2-Symmetric P-Chiral Diphosphines
作者:Alexander R. Muci、Kevin R. Campos、David A. Evans
DOI:10.1021/ja00140a028
日期:1995.9
Communication is to disclose a convenient approach to the synthesis of Cz-symmetric P-chiral diphosphines4 that relies upon successive enantioselectivedeprotonation of aryldimethylphosphine-boranes or aryldimethylphosphine sulfides (eq 1) and subsequent oxidative coupling to the diphosphine precursors (eq 2) with high overall enantioselectivity (296%) for the two-step process.
Stereochemistry of oxidation of organophosphorus thiono-compounds and P III compounds by nitric acid and dinitrogen tetroxide
作者:Jan Michalski、A. Okruszek、W. Stec
DOI:10.1039/c29700001495
日期:——
The stereochemical course of oxidation at the phosphorus atom in phosphorus thiono-derivatives, phosphines, and phosphites is shown to depend on structural factors as well as on the nature of the oxidising agent.
Scalable Enantiomeric Separation of Dialkyl-Arylphosphine Oxides Based on Host-Guest Complexation with TADDOL-Derivatives, and their Recovery
作者:Bence Varga、Réka Herbay、György Székely、Tamás Holczbauer、János Madarász、Béla Mátravölgyi、Elemér Fogassy、György Keglevich、Péter Bagi
DOI:10.1002/ejoc.202000035
日期:2020.3.31
enantioseparation of dialkyl‐arylphosphineoxides was elaborated, and five phosphine oxides were prepared with ee higher than 94 %. It was shown that these resolutions can be performed on gram scale, and can give both enantiomers of a phosphine oxide. It was demonstrated that organic solvent nanofiltration can serve as an alternative method of column chromatography for the recovery of the P‐oxide enantiomers and
Stereoselective Catalytic Synthesis of <i>P</i>-Stereogenic Oxides via Hydrogenative Kinetic Resolution
作者:Héctor Fernández-Pérez、Anton Vidal-Ferran
DOI:10.1021/acs.orglett.9b02606
日期:2019.9.6
derived from an enantiopure P-OP ligand to kinetically resolve racemic α,β-unsaturated phosphane oxides by hydrogenation of the C═C motif and formation of highly enantioenriched (or even enantiopure) P-stereogenic oxides. The practicality of the methodology has been demonstrated by the preparation of potentially functional P-chiral molecules for catalytic enantioselective synthesis.
Optically active phosphine sulphides from phosphine oxides and boron trisulphide
作者:Bruce E. Maryanoff、Reginald Tang、Kurt Mislow
DOI:10.1039/c39730000273
日期:——
Borontrisulphide transforms tertiary phosphineoxides into the corresponding phosphinesulphides with high stereospecificity and net retention of configuration at phosphorus.