title: Synthesis and characterization of the ligand based on benzoxazole and its transition metal complexes: DNA-binding and antitumor activity.
abstract: A new ligand 2-((2-((benzo[d]oxazol-2-yl)methoxy)phenoxy)methyl)benzoxazole (L) and its four transition metal complexes M(NO(3))(2)L (M=Cu, Co, Ni, Zn), have been synthesized and investigated. The single crystal structures of the complexes show that all of them have similar molecular structure and the ligand exhibits good coplanarity after coordination with the metal ions. Further investigation of DNA binding indicates that both the ligand L and the complexes can bond to DNA by intercalation mode, and the latter possesses much stronger binding affinity. Antitumor activity of these compounds tested on the four cancer cell lines, follows the order: Cu-L>Ni-L approximately Co-L>Zn-L>>L, which are thought to be related with their DNA-binding affinity.
authors.affiliation: Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Jiang
authors.forename: Xiaoliang
authors.initials: X
authors.lastname: Tang
authors.forename: Wei
authors.initials: W
authors.lastname: Dou
authors.forename: Huihui
authors.initials: H
authors.lastname: Zhang
authors.forename: Weisheng
authors.initials: W
authors.lastname: Liu
authors.forename: Chenxuan
authors.initials: C
authors.lastname: Wang
authors.forename: Jiangrong
authors.initials: J
authors.lastname: Zheng
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D001583:Benzoxazoles / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D002942:Circular Dichroism; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D018360:Crystallography, X-Ray; D004247:DNA / Q000737:chemistry / Q000378:metabolism*; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D008024:Ligands; D008670:Metals / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D008958:Models, Molecular; D008969:Molecular Sequence Data; D015394:Molecular Structure; D028561:Transition Elements / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000970:Antineoplastic Agents; D001583:Benzoxazoles; D056831:Coordination Complexes; D008024:Ligands; D008670:Metals; D028561:Transition Elements; D004247:DNA