Synthesis and characterization of a triazine dendrimer that sequesters iron(III) using 12 desferrioxamine B groups.
Synthesis and characterization of a triazine dendrimer that sequesters iron(III) using 12 desferrioxamine B groups.
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DOI:
10.1016/j.bmc.2010.05.039
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发表时间:
2010-08-01
影响因子:
3.5
通讯作者:
Simanek EE
中科院分区:
文献类型:
--
作者:
Lim J;Venditto VJ;Simanek EE
The synthesis of a third generation triazine dendrimer, 1, containing multiple, iron-sequestering desferrioxamine B (DFO) groups is described. Benzoylation of the hydroxamic acid groups of DFO and formation of a reactive dichlorotriazine provide the intermediate for reaction with the second generation dendrimer displaying twelve amines. This strategy further generalizes the “functional monomer” approach to generate biologically active triazine dendrimers. Dendrimer 1 is prepared in seven steps in 35% overall yield and displays 12 DFO groups making it 56% drug by weight. Spectrophotometric titrations (UV-Vis) show that 1 sequesters iron(III) atoms with neither cooperativity nor significant interference from the dendrimer backbone. Evidence from NMR spectroscopy and mass spectrometry reveals a limitation to this functional monomer approach: trace amounts of O-to-N acyl migration from the protected hydroxamic acids to the amine-terminated dendrimer occurs during the coupling step leading to N-benzoylated dendrimers displaying fewer than 12 DFO groups.
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DOI:
10.1073/pnas.86.24.10108
发表时间:
1989-12-01
影响因子:
11.1
作者:
HALLAWAY, PE;EATON, JW;HEDLUND, BE
通讯作者:
HEDLUND, BE
影响因子:
2.3
作者:
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影响因子:
2.4
作者:
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通讯作者:
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影响因子:
3.3
作者:
Crampton, Hannah;Hollink, Emily;Simanek, Eric E.
通讯作者:
Simanek, Eric E.
影响因子:
20.3
作者:
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通讯作者:
Link, G