Optically Active Anti Head-to-head Coumarin Dimer. A New Agent for the Determination of Enantiomeric Excess of Amines and Alcohols

Abstract
The enantiomeric excess of chiral amines was successfully determined by 1H NMR spectral and/or HPLC analysis of the diastereomeric diamides derived from optically active anti head-to-head coumarin dimer and the amines by lactone-ring-opening reaction without any condensing agent. This procedure also proved to be applicable to chiral alcohols.