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.

|July 1, 1995

Abstract:

To prepare less lipophilic BATO complexes, two new methoxy-substituted dioximes were synthesized: cis-4,5-dimethoxycyclohexane-1,2-dione dioxime (DMCDO) and 1,4-dimethoxybutane-2,3-dione dioxime (DMDMG). 99mTcCl(DMCDO)3BMe (BMe = methylboronic acid) was prepared and characterized. Reversed-phase HPLC analyses of 99mTcCl(DMCDO)3BMe and 99mTcCl(DMCDO)3-p-TBA (p-TBA = p - tolylboronic acid) indicated that both of these complexes were mixtures of four enantiomeric pairs of diastereomers. Attempted preparation of a BATO complex from DMDMG gave a mixture of products. In rats, 99mTcCl(DMCDO)3BMe displayed more rapid liver and renal clearance than 99mTcCl(CDO)3BMe, but 99mTcCl(DMCDO)3BMe and 99mTcCl(DMCDO)3-p-TBA displayed low uptake in both heart and brain.

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Abstract:

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