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Related Experiment Videos

BATO complexes derived from dimethoxy dioximes: synthesis, characterization and biodistribution

K Ramalingam1, S S Jurisson, B L Kuczynski

  • 1Bristol-Myers Squibb Pharmaceutical Research Institute, Princeton, NJ 08543, USA.

Nuclear Medicine and Biology
|July 1, 1995
PubMed
Summary

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New methoxy-substituted dioximes were synthesized to create less lipophilic BATO complexes. The technetium-99m complex 99mTcCl(DMCDO)3BMe showed faster liver and kidney clearance in rats.

Area of Science:

  • Radiopharmaceutical Chemistry
  • Coordination Chemistry
  • Organic Synthesis

Background:

  • BATO complexes are used in nuclear medicine.
  • Lipophilicity affects biodistribution and clearance of radiopharmaceuticals.
  • Developing less lipophilic complexes can improve imaging properties.

Purpose of the Study:

  • To synthesize novel methoxy-substituted dioximes for BATO complex preparation.
  • To evaluate the properties and in vivo behavior of a new technetium-99m complex.
  • To assess the impact of methoxy substitution on lipophilicity and biodistribution.

Main Methods:

  • Synthesis of cis-4,5-dimethoxycyclohexane-1,2-dione dioxime (DMCDO) and 1,4-dimethoxybutane-2,3-dione dioxime (DMDMG).
  • Preparation and characterization of 99mTcCl(DMCDO)3BMe.

Related Experiment Videos

  • Reversed-phase High-Performance Liquid Chromatography (HPLC) analysis.
  • Biodistribution studies in rats.

    • Main Results:

    • DMCDO and DMDMG were successfully synthesized.
    • 99mTcCl(DMCDO)3BMe was prepared and found to be a mixture of diastereomers.
    • HPLC confirmed the diastereomeric nature of 99mTcCl(DMCDO)3BMe and 99mTcCl(DMCDO)3-p-TBA.
    • In vivo studies showed faster liver and renal clearance for 99mTcCl(DMCDO)3BMe compared to 99mTcCl(CDO)3BMe.
    • Both 99mTcCl(DMCDO)3BMe and 99mTcCl(DMCDO)3-p-TBA exhibited low uptake in the heart and brain.

    Conclusions:

    • Methoxy substitution in dioximes can reduce the lipophilicity of BATO complexes.
    • 99mTcCl(DMCDO)3BMe demonstrates altered pharmacokinetic properties, including enhanced clearance.
    • The observed low uptake in critical organs suggests potential for targeted applications, though further investigation is needed.