高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (8): 1242.

• 论文 • 上一篇    下一篇

多胺多羧酸双吡哆醇酯顺磁性金属螯合物及其弛豫性能研究

魏俊发, 卓仁禧   

  1. 武汉大学化学系, 武汉, 430072
  • 收稿日期:1997-07-12 出版日期:1998-08-24 发布日期:1998-08-24
  • 通讯作者: 魏俊发,男,34岁,博士,现为陕西师范大学化学系教授.
  • 作者简介:魏俊发,男,34岁,博士,现为陕西师范大学化学系教授.
  • 基金资助:

    国家"八六三"计划(批准号:29-02-02)和中国博士后科学基金资助课题.

Paramagnetic Metal Chelates of DTPA-and EDTA-dipyridoxolester Derivatives and Their NMR T1Relaxivities in Water

WEI Jun-Fa, ZHUO Ren-Xi   

  1. Department of Chemistry, Wuhan University, Wuhan, 430072
  • Received:1997-07-12 Online:1998-08-24 Published:1998-08-24

摘要: 由二乙三胺五乙酸(DTPA)双酸酐和乙二胺四乙酸(EDTA)双酸酐与维生素B6族化合物吡哆醇(PN)或其衍生物合成了一系列新型的多胺多羧酸双吡哆醇酯衍生物及其钆(Ⅲ)、锰(Ⅱ)、铁(Ⅲ)等顺磁性金属螯合物,研究了其中钆(Ⅲ)和锰(Ⅱ)螯合物在体外水溶液中对水质子的纵向弛豫性能(R1).结果表明,所有配体和配合物均有很好的水溶性,且对光和空气稳定.螯合物的弛豫率(T1)可与其母体螯合物相媲美,如钆-二乙三胺五乙酸二吡哆醇酯(GdDTPA-BPN)和锰-乙二胺四乙酸二吡哆醇酯(MnEDTA-BPN)的弛豫率R1分别为5.5和3.1L·mmol-1·s-1,与其母体螯合物GdDTPA2-和MnEDTA2-的R1值(5.2和2.8L·mmol-1·s-1)相当.

关键词: 磁共振成像造影剂, 钆配合物, 吡哆醇, 氨羧螯合剂, 弛豫

Abstract: Several novel ligands of DTPAa-nd EDTA-dipyridoxolester derivatives have been synthesized by reaction of DTPA-dianhydride and EDTA-dianhydride with pyridoxol(vitamin B6) in dry DMF. Their complexes of gadoliniun, manganese and iron were prepared and the measurements of T1relaxivities in solution of water in vitro were performed with the gadolinium and the manganese complexes. The results show that all of the complexes are highly water soluble and very slightly light and air sensitive both in solid state and in solution. The T1relaxivities of the complexes, for example, gadolinium-DTPA-dipyridoxolester, GdDTPA-BPN, and manganese-EDTA-dipyridoxolester, MnEDTA-BPN, were determined to be 5.5 and 3.1 L·mmol-1·s-1, respectively. These can be compared to the values of the corresponding complexes of their parent ligands, GdDTPA2-and MnEDTA2-, indicating the complexes are potentially useful contrast agents for magnetic resonance imaging.

Key words: Magnetic resonance imaging contrast agent, Gadolinium complex, Pyridoxol, Amino-carboxy chelating agent, Relaxivity

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