Developing a New Class of Axial Chiral Phosphorus Ligands: Preparation and Characterization of Enantiopure Atropisomeric Phosphinines
作者:Christian Müller、Evgeny A. Pidko、Antonius J. P. M. Staring、Martin Lutz、Anthony L. Spek、Rutger A. van Santen、Dieter Vogt
DOI:10.1002/chem.200800175
日期:2008.5.29
Both enantiomers of the first atropisomericphosphinine (1) have been isolated by using analytical HPLC on a chiral stationary phase. The enrichment of one enantiomer and a subsequent investigation into its racemization kinetics revealed a barrier for internal rotation of DeltaG(298)(double dagger) = (109.5+/-0.5) kJ mol(-1), which is in excellent agreement with the theoretically predicted value of