First resolution of a linear chelating tetra(tertiary phosphine): resolution and absolute configurations of enantiomers of (R*,R*)-(±)-1,1,4,7,10,10-hexaphenyl-1,4,7,10-tetraphosphadecane

Abstract

The important and commercially available linear tetra(tertiary phosphine)(R*,R*)-(±)/(R*,S*)-Ph2PCH2CH2P(Ph)CH2CH2P(Ph)CH2CH2PPh2 has been separated into diastereoisomers and the (R*,R*)-(±)-diastereoisomer resolved by the method of metal complexation giving the first optically active tetra(tertiary phosphine).