Se. Brown et al., TRYPTOPHAN ANION COMPLEXES OF BETA-CYCLODEXTRIN (CYCLOMALTAHEPTAOSE),AN AMINOPROPYLAMINO-BETA-CYCLODEXTRIN AND ITS ENANTIOSELECTIVE NICKEL(II) COMPLEX, Journal of the Chemical Society, Chemical Communications, (1), 1994, pp. 47-47
'-(3-Aminopropylamino)-6'-deoxy-cyclomaltaheptaose (beta CDpn) exhibit
s enhanced complexation of tryptophan anion, by comparison with beta C
D, while the nickel(II) complex of beta CDpn complexes tryptophan anio
n even more strongly and exhibits a tenfold enantioselectivity in favo
ur of the (S)-tryptophan anion.