Sulfur transfer reaction from phosphine sulfides to phosphines assisted by metal ions

The sulfur transfer reaction from phosphine sulfides to various phosphines in the presence of metal ion was studied; in the presence of Cu(I), a sulfur transfer reaction from dppmS2 (bis(diphenylphosphino)methane disulfide) to dppm (bis(diphenylphosphino)methane) or to dppa (bis(diphenylphosphino)amine) occurs and the product [Cu(dppmS)2]+ (1) and [Cu(dppmS)(dppaS)]+ (2) was obtained quantitatively. In the presence of Zn(II), sulfur transfer to various phosphines can be carried out catalytically. The reaction mechanism has been proposed from the difference in the reactivity of diphosphines and metal ions.

Sulfur transfer reaction from phosphine sulfides to various phosphines in the presence of metal ion was studied; in the presence of Cu(I), sulfur transfer reaction from dppmS2 (bis(diphenylphosphino)methane disulfide) to dppm (bis(diphenylphosphino)methane) gives [Cu(dppmS)2]+ quantitatively. In the presence of Zn(II), sulfur transfer to various phosphines can be carried out catalytically. The reaction mechanism has been proposed from the difference in the reactivity of diphosphines and metal ions.Figure optionsDownload as PowerPoint slideHighlights
► In this study, we report sulfur transfer from phosphine sulfide to phosphine.
► We found the stoichiometric sulfur transfer reaction in the presence of Cu(I) ions.
► The reaction was carried out catalytically in the presence of Zn(II) ions.
► Reactivity depending on phosphines deduce the overall transfer mechanism.