These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: [Studies on the composition and stability constant of inclusion complexes of beta-cyclodextrin with fluorouracil and ftorafur by NMR].
    Author: Wen JQ, Cui W.
    Journal: Yao Xue Xue Bao; 1990; 25(5):345-8. PubMed ID: 2284953.
    Abstract:
    The composition and stability constants of the host-guest inclusion complexes of beta-cyclodextrin (beta-CD) with fluorouracil (5-Fu) and ftorafur (FT-207) were studied by 19F NMR. The 19F chemical shift changes (delta) of 5-Fu and FT-207 on complexation with beta-CD were used to determine the stoichiometry of these inclusion complexes by Job plot. It was shown that both 5-Fu and FT-207 formed 1:1 inclusion complexes with beta-CD. The stability constants (Kc) of their complexes. with beta-CD, calculated from the slope of linear relation between delta/CCD0 and delta(CCD0 being the initial concentration of beta-CD) were found to be 17.0 +/- 1.7 mol-1.L and 9.0 +/- 0.1 mol-1.L at 40 degrees C respectively. The 19F chemical shifts of these complexes relative to their free forms were also obtained and discussed in terms of the structures of these beta-CD inclusion complexes in aqueous solution.
    [Abstract] [Full Text] [Related] [New Search]