REDUCTION OF TERMINAL ORGANYLCHALCOGENO PHOSPHONATES AS A WAY TO PREPARE PRIMARY ORGANYLCHALCOGENO PHOSPHINES

Abstract

2-Organylseleno(telluro)ethyl phosphines and 4-organylthio(seleno (telluro))butyl phosphines were prepared by reduction of diethyl 2-organylseleno(telluro)ethyl phosphonates and diethyl 4-organylthio(seleno(telluro)) butyl phosphonates with lithium aluminium hydride in diethyl ether. ¹H and ³¹P NMR spectra as well as mass spectra of the resulting phosphines were considered. Their stability in regard to the oxidation by oxygen was discussed.

Keywords:

• Organylchalcogenoalkyl phosphines
• organylchalcogeno alkyl phosphonates
• reduction

Notes

^a A—Reaction mixture is treated with water and extracted with Et₂O; B—Et₂0 is evaporated from the reaction mixture, the residue is extracted with CHCl₃ and the precipitate filtered off.

^b Based on the content in the reaction mixture.