Improvement in the method of NMR imaging employing a manganese II chelates of N,N'-bis[pyridoxal-alkylene (or cycloalkylene) (or arylene)]-N,N'-diacetic acid derivatives

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United States of America Patent

PATENT NO 4994259
SERIAL NO

07380185

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Manganese(II) chelates of N,N'-bis-(pyridoxal)-alkylenediamine-N,N'-diacetic acids, N,N'-bis-(pyridoxal)-1,2-cycloalkylenediamine-N,N'-diacetic acids, N,N'-bis-(pyridoxal)-1,2-arylenediamine-N,N'-diacetic acids, N,N'-bis-(pyridoxal)-alkylenediamine-N-acetic acids, N,N'-bis-(pyridoxal)-1,2-cycloalkylenediamine-N-acetic acids, N,N'-bis-(pyridoxal)-1,2-arylenediamine-N-acetic acids, and their salts are highly stable, superior NMRI contrast agents. They maintain the manganese(II) ion in the +2 valence state. Preferred contrast agents are manganese(II) ion chelates of N,N'-bis-(pyridoxal)ethylenediamine-N,N'-diacetic acid, N,N'-bis-(pyridoxal)trans-1,2-cyclohexylenediamine-N,N'-diacetic acid, and the salts and esters thereof. Novel chelate forming compounds are the N,N'-bis-(pyridoxal)-1,2-cycloalkylenediamine-N,N'-diacetic acids and N,N'-bis-(pyridoxal)1,2-arylene-diamine-N,N'-diacetic acids, N,N'-bis-(pyridoxal)-alkylenediamine-N-acetic acids, N,N'-bis(pyridoxal)-1,2-cycloalkylenediamine-N-acetic acids, N,N'-bis-(pyridoxal)-1,2-arylenediamine-N-acetic acids, and their salts and esters.

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Patent Owner(s)

Patent OwnerAddress
AMERSHAM HEALTH SALUTAR INC101 CARNEGIE CENTER PRINCETON NJ 08540

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Quay, Steven C Los Altos Hills, CA 205 4684
Rocklage, Scott M Saratoga, CA 35 904

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