Elsevier, Tetrahedron: Asymmetry, 11(14), p. 1535-1539
DOI: 10.1016/s0957-4166(03)00273-8
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Cyclodextrins were used as chiral selectors for the 31P NMR determination of the enantiomeric excess of aminoalkanephosphonic and aminoalkanephosphinic acids. Most of these acids form inclusion complexes with α- and/or β-cyclodextrin and upon increasing the cyclodextrin to aminophosphonic acid molar ratio 31P NMR signals for (R)- and (S)-enantiomers separate. ROESY spectra allowed the determination of structures of the inclusion complexes.