R. Hulst et al., 5,5-DIMETHYL-4(R)-PHENYL-1,3,2-DIOXAPHOSPHORINANE, A NEW REAGENT FOR THE ENANTIOMERIC EXCESS DETERMINATION OF UNPROTECTED AMINO-ACIDS USINGP-31 NMR, Tetrahedron : asymmetry, 5(9), 1994, pp. 1701-1710
Diastereomeric amide derivatives of title phosphorinane 2 and unprotec
ted amino acids are easily prepared in aqueous solutions, showing well
separated signals in the P-31 NMR spectra allowing accurate e.e. dete
rmination.