Small differences in structure, a large difference in activity – Comparing a new Ru(II)-3-hydroxyiminoflavanone complex with analogous Ru(II) compounds
摘要:
Ruthenium compounds are a class of potential anticancer agents in a field with many emerging metal based drugs and drug candidates. This work presents the synthesis and structural evaluation of a new Ru(II) complex of 3-hydroxyiminoflavanone with spectroscopic and crystallographic methods. Its cytostatic and hemostatic activity, as well as its behavior in solution, are compared with those of two previously described, cytotoxic Ru(II) complexes with C2-substituted 3-iminoflavanones. The synthesis of this compound results in the oxidation of one of the two coordinated 3-hydroxyiminoflavanones to 3-nitro-soflavone and reduction of Ru(III) to Ru(II). The obtained complex has moderate to low toxicity towards five human cancer cell lines, unlike similar ruthenium compounds. The article attempts to account for the difference on the basis of structural differences, solution UV-Vis studies and theoretical evaluation. As none of the tested compounds seriously alter hemostasis or red blood cell integrity in vitro, they might be suitable for further in vitro and in vivo testing. (C) 2016 Elsevier B.V. All rights reserved.
Small differences in structure, a large difference in activity – Comparing a new Ru(II)-3-hydroxyiminoflavanone complex with analogous Ru(II) compounds
Ruthenium compounds are a class of potential anticancer agents in a field with many emerging metal based drugs and drug candidates. This work presents the synthesis and structural evaluation of a new Ru(II) complex of 3-hydroxyiminoflavanone with spectroscopic and crystallographic methods. Its cytostatic and hemostatic activity, as well as its behavior in solution, are compared with those of two previously described, cytotoxic Ru(II) complexes with C2-substituted 3-iminoflavanones. The synthesis of this compound results in the oxidation of one of the two coordinated 3-hydroxyiminoflavanones to 3-nitro-soflavone and reduction of Ru(III) to Ru(II). The obtained complex has moderate to low toxicity towards five human cancer cell lines, unlike similar ruthenium compounds. The article attempts to account for the difference on the basis of structural differences, solution UV-Vis studies and theoretical evaluation. As none of the tested compounds seriously alter hemostasis or red blood cell integrity in vitro, they might be suitable for further in vitro and in vivo testing. (C) 2016 Elsevier B.V. All rights reserved.