Synthesis, structure, DNA-binding, and cytotoxic activities of <i>N</i>-(5-chloro-2-hydroxyphenyl)-<i>N′</i>-[3-(2-hydroxyethylamino)propyl]oxamide and its dicopper(II) complex
作者:Shi-Hao Cui、Man Jiang、Yan-Tuan Li、Zhi-Yong Wu、Xiao-Wen Li
DOI:10.1080/00958972.2011.638063
日期:2011.12.10
A dissymmetrical N, N'-bis(substituted) oxamide, N-(5-chloro-2-hydroxyphenyl)-N'[3-(2-hydroxyethylamino) propyl] oxamide (H(3)oxpep), and its dicopper(II) complex, [Cu-2(oxpep)(phen)]ClO4 (1) (phen = 1,10-phenanthroline), were synthesized. The crystal structure of 1 was determined by single-crystal X-ray diffraction. In 1, Cu1 and Cu2 are bridged by cis-oxpep(3-) with Cu center dot center dot center dot Cu separation of 5.2007(6) angstrom. Cu1 is in a distorted squarepyramidal environment, while Cu2 has a square-planar coordination geometry. The 3-D supramolecular structure of 1 is formed through pi-pi stackings and hydrogen bonds. The DNA-binding properties and cytotoxic activities of the two compounds were investigated. The results suggest that the two compounds can interact with HS-DNA by intercalation with binding affinities following the order 1 > H(3)oxpep, which is consistent with their anticancer activities.