Access to Planar Chirality through Cycloplatination of ((Dimethylamino)methyl)ferrocene by <i>cis</i>-[PtCl₂(SOMeAr)₂] (Ar = Phenyl, <i>p</i>-Tolyl)

Abstract

A reaction between ((dimethylamino)methyl)ferrocene and the enantiomerically pure complex cis -[PtCl 2 ( S -SOMeC 6 H 4 Me- p ) 2 ] affords the two easily separable cycloplatinated S S R P and S S S P diastereoisomers 4 and 5, respectively. The absolute configuration of 4 was established by an X-ray study. Diastereomers 4 and 5 react with PPh 3 to give enantiomers with the planar chirality only.