申请人:Salutar, Inc.
公开号:US04842845A1
公开(公告)日:1989-06-27
Radioactive metal ion chelates of 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 agents for radiopharmaceutical imaging. Preferred contrast agents are radioactive metal ion such as technetium-99m and indium-111 ion chelates of N,N'-bis-(pyridoxal-5-phosphate)ethylenediamine-N,N'-diacetic acid, N,N'-bis-(pyridoxal-5-phosphate)trans-1,2-cyclohexylene-diamine-N,N'-diace tic acid, N,N'-bis-(pyridoxal-5-phosphate)trans-1,2-arylenediamine-N,N'-diacetic acid, and the soluble calcium salts thereof.
放射性金属离子螯合物包括N,N'-双(吡ridoxal-5-磷酸)-烷二胺-N,N'-二乙酸、N,N'-双(吡ridoxal-5-磷酸)-1,2-环烷二胺-N,N'-二乙酸和N,N'-双(吡ridoxal-5-磷酸)-1,2-芳基二胺-N,N'-二乙酸,相应的单磷酸盐和单乙酸盐,以及它们的盐和酯形成稳定的、高溶解度的螯合物与顺磁性金属离子,并且是高效的放射性药物成像剂。首选的对比剂是放射性金属离子,如N,N'-双(吡ridoxal-5-磷酸)乙二胺-N,N'-二乙酸、N,N'-双(吡ridoxal-5-磷酸)反-1,2-环己烷二胺-N,N'-二乙酸、N,N'-双(吡ridoxal-5-磷酸)反-1,2-芳基二胺-N,N'-二乙酸及其可溶性钙盐。