Details for Patent: 5,091,169

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Summary for Patent: 5,091,169

Patent landscape, scope, and claims:

Title:	Dipyridoxyl phosphate NMRI contrast agent compositions
Abstract:	N,N'-bis-(pyridoxal-5-phosphate)-alkylenediamine-N,N'-diacetic acids, N,N'-bis-(pyridoxal-5-phosphate)-1,2-cycloalkylenediamine-N,N'-diacetic acids, and N,N'-bis-(pyridoxal-5-phosphate)-1,2-arylenediamine-N,N'-diacetic acids, the corresponding monophosphate compounds and monoacetic acid compounds, and their salts and esters form stable, highly soluble chelates with paramagnetic metal ions, and are highly effective NMRI contrast agents. Preferred contrast agents are paramagnetic ion chelates of N,N'-bis-(pyridoxal-5-phosphate)ethylenediamine-N,N'-diacetic acid, N,N'-bis-(pyridoxal-5-phosphate)trans-1,2-cyclohexylenediamine-N,N'diaceti c acid, N,N'-bis-(pyridoxal-5-phosphate)trans-1,2-arylenediamine-N,N'-diacetic acid, and the soluble calcium salts thereof. Novel intermediates for forming these compounds are N,N'-bis(pyridoxal-5-phosphate)alkylenediimines, N,N'-bis(pyridoxal-5-phosphate)alkylenediamines, N,N'-bis(pyridoxal-5-phosphate)-1,2-cycloalkylenediimines, N,N'-bis(pyridoxal-5-phosphate)-1,2-cycloalkylenediamines, N,N'-bis(pyridoxal-5-phosphate)-1,2-arylenediamines, and the corresponding monophosphate compounds.
Inventor(s):	Rocklage; Scott M. (Saratoga, CA), Quay; Steven C. (Los Altos Hills, CA)
Assignee:	Salutar, Inc. (Sunnyvale, CA)
Application Number:	07/370,429
Patent Claim Types: see list of patent claims	Composition; Compound;
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