Catalyst–substrate complexes of chiral seven-membered ring chelates of rhodium(I)-bis(phosphinites)

Abstract

Line-shape analysis of ³¹P NMR spectra of catalyst substrate complexes of seven-membered ring rhodium(I)-bisphosphinites indicate for the first time a quantifiable preference of the intramolecular major–minor isomerisation of both diastereoisomeric chelates of dimethyl itaconate over the slow intermolecular interconversion.