Pyridoxamine chelating compounds, manganese (II) chelates and their use as NMRI contrast agents
申请人:NYCOMED SALUTAR, INC.
公开号:EP0292761A2
公开(公告)日:1988-11-30
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-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 and esters.
N,N′-双(吡哆醛)烷二胺-N,N′-二乙酸、N,N′-双(吡哆醛)-1、2-环烷基二胺-N,N′-二乙酸、N,N′-双-(吡哆醛)-1,2-芳基二胺-N,N′-二乙酸、N、N,N′-双(吡哆醛)烷基二胺-N-乙酸、N,N′-双(吡哆醛)-1,2-环烷基二胺-N-乙酸、N,N′-双(吡哆醛)-1,2-芳基二胺-N-乙酸及其盐类是高度稳定的优质 NMRI 造影剂。它们能使锰(II)离子保持 +2 价态。首选的造影剂是 N,N′-双(吡哆醛)乙二胺-N,N′-二乙酸、N,N′-双(吡哆醛)反式-1,2-环己基二胺-N,N′-二乙酸及其盐和酯的锰(II)离子螯合物。
新型的螯合形成化合物有 N,N′-双(吡哆醛)-1,2-环烷基二胺-N,N′-二乙酸和 N,N′-双(吡哆醛)-1,2-芳基二胺-N,N′-二乙酸、N、N,N′-双(吡哆醛)烷基二胺-N-乙酸、N,N′-双(吡哆醛)-1,2-环烷基二胺-N-乙酸、N,N′-双(吡哆醛)-1,2-芳基二胺-N-乙酸及其盐和酯。