(S)-2H-2-oxo-5,5-dimethyl-4(R)-phenyl-1,3,2-dioxaphosphorinane, a New Reagent for the Enantiomeric Excess Determination of Unprotected Amino Acids using 31P NMR

Article abstract of DOI:10.1016/0957-4166(94)80081-2

Diastereomeric amide derivatives of title phosphorinane 2 and unprotected amino acids are easily prepared in aqueous solutions, showing well separated signals in the 31P NMR spectra allowing accurate e.e. determination.