238420-38-7Relevant articles and documents
A practical route for the preparation of 1,4,7-triazacyclononanyl diacetates with a hydroxypyridinonate pendant arm
Gai, Yongkang,Hu, Zhongping,Rong, Zhao,Ma, Xiang,Xiang, Guangya
, p. 19393 - 19405 (2015/11/27)
The preparation of triazamacrocyclic hydroxypyridinonate (HOPO-TACN) derivatives as potential chelators for metals in biomedical applications was reported. The synthesis is based on a convergent synthetic approach, in which the key intermediate di-tert-butyl-2,2′-(1,4,7-triazonane-1,4-diyl) diacetate was coupled with a hydroxypyridinonate pendant arm. The method is suitable for rapid syntheses of metal chelator HOPO-TACNs of biomedical interest.
Allosteric binding of alkali metal ions to a pseudocryptand formed by a C-pivot tripodal ligand containing 3-hydroxy-2(1H)-pyridinone and Ga(III)
Katoh, Akira,Kudo, Hidenori,Saito, Ryota
, p. 285 - 297 (2007/10/03)
A novel C-pivot tripodal hexadentate ligand (3,2-HOPOHL) composed of 3-hydroxy-2(1H)-pyridinone as a bidentate ligand, the ethyleneoxy chain as a spacer, and tris(carboxyric acid) as an anchor was synthesized. 3,2-HOPOHL recognized only Na+ ion, suggesting that it pre-organized a cavity due to the electrostatic interaction among the 2(1H)-pyridinone rings. UV-VIS spectroscopic analysis indicated that 3,2-HOPOHL formed a stable intramolecular 1:1 Fe(III) complex in aqueous solution. The stability constant (log K) of 3,2-HOPOHL-Fe(III) complex was estimated to be 27.6 from the competitive reaction with EDTA. 1H-NMR titration of 3,2-HOPOHL-Ga(III) complex with Na+ and K+ ions in CDCl3-CD3CN indicated the formation of 1:1 complexes. The binding constants of Na+- and K+-3,2-HOPOHL-Ga(III) complexes were estimated to be 3.3×103 and 7.8×103 M-1, respectively, the ion selectivity of K+ toward Na+ being more than two-fold.
Macrocyclic ligands bearing two 3-(hydroxy)-2-pyridinone moieties as side-arms. Conformational studies, synthesis, crystal structure, and alkali and alkaline earth complex formation
Ambrosi, Gianluca,Dapporto, Paolo,Formica, Mauro,Fusi, Vieri,Giorgi, Luca,Guerri, Annalisa,Lucarini, Simone,Micheloni, Mauro,Paoli, Paola,Pontellini, Roberto,Rossi, Patrizia,Zappia, Giovanni
, p. 1359 - 1367 (2007/10/03)
The synthesis and characterization of the new tetraazamacrocycle 4(N),10(N)-bis[2-(3-hydroxy-2-oxo-2H-pyridin-1-yl)ethyl]-1,7-dimethyl-1,4,7, 10-tetraazacyclododecane (L1) is reported. L1 shows two 3-(hydroxy)-1- (carbonylmethylen)-2(H)-pyridinone (HPO) m