申请人:University of Utah Research Foundation
公开号:US05494935A1
公开(公告)日:1996-02-27
Several new powerful chelating agents, suitable for the removal of a variety of certain heavy metal ions from the body of a mammal by oral application, have been synthesized and tested. Structurally, these compounds are partially lipophilic polyaminocarboxylic acids (PACA). They were synthesized in non-aqueous media from triethylenetetramine (TT) by monoalkylation of a primary amino group, followed by exhaustive carboxymethylation of the remaining amino groups using ethylbromoacetate and subsequent alkaline hydrolysis of the ester. In contrast to their non-lipophilic counterparts EDTA and DTPA, compositions of the present inventions exhibit appreciable absorption from the intestine and, therefore, can be administered orally. By varying the length of the alkyl chain, the chelons can be directed primarily to selected target organs. In addition, the compounds can be modified to target particular absorbed heavy metals.
已经合成并测试了几种新的强螯合剂,适用于通过口服从哺乳动物体内去除多种特定的重金属离子。从结构上看,这些化合物是部分亲脂性的多胺羧酸(PACA)。它们是在非水介质中从三乙烯四胺(TT)合成的,通过对一级氨基进行单烷基化,然后使用溴乙酸乙酯对剩余氨基进行充分的羧甲基化,最后碱性水解酯。与它们的非亲脂性对应物EDTA和DTPA相比,本发明的组合物在肠道中表现出可观的吸收,因此可以口服。通过改变烷基链的长度,可以将螯合剂主要定向到选定的靶器官。此外,这些化合物可以被修改以针对特定吸收的重金属。