Abstract A series of palladium(II) complexes with 1H- and 2H-tetrazole ligands (2-isopropyl-5-R-2H-tetrazoles and 1H-tetrazol-1-ylcarboxylic acids) was synthesized. Structure of the obtained compounds Show more
Abstract A series of palladium(II) complexes with 1H- and 2H-tetrazole ligands (2-isopropyl-5-R-2H-tetrazoles and 1H-tetrazol-1-ylcarboxylic acids) was synthesized. Structure of the obtained compounds was confirmed by 1H and 13C NMR spectroscopy, high-resolution mass spectrometry, and single crystal X-ray diffraction analysis. According to the spectrophotometry data, the complexes are weakly bound to DNA. The cytotoxic activity of the obtained palladium complexes was studied in vitro. Show less
A new diaminocarbene cis-palladium(II) complex containing a 2-aminobenzoxazole ligand was synthesized by reacting cis-[PdCl2(CNCy)2] and 2-aminobenzoxazole. The structure and composition of the obtain Show more
A new diaminocarbene cis-palladium(II) complex containing a 2-aminobenzoxazole ligand was synthesized by reacting cis-[PdCl2(CNCy)2] and 2-aminobenzoxazole. The structure and composition of the obtained complex were proven by NMR spectroscopy and high-resolution mass spectrometry. The cytotoxicities of the obtained complex and structurally similar palladium(II) complexes containing a 2-aminothiazole ligand were tested against human cancer cells of various histogenesis (MCF-7, HL60, HeLa, DLD1, A431). The activities of several complexes against cancer cells were higher than those of the reference drug cisplatin and the free ligands, i.e., 2-aminooxazole and substituted 2-aminothiazoles. Show less
Tetrazole cycle is a promising pharmacophore fragment frequently used in the development of novel drugs. This moiety is a stable, practically non-metabolized bioisosteric analog of carboxylic, cis-ami Show more
Tetrazole cycle is a promising pharmacophore fragment frequently used in the development of novel drugs. This moiety is a stable, practically non-metabolized bioisosteric analog of carboxylic, cis-amide, and other functional groups. Over recent 10-15 years, various isomeric forms of tetrazole (NH-unsubstituted, 1H-1- substituted, and 2H-2-substituted tetrazoles) have been successfully used in the design of promising anticancer drugs. Coordination compounds of transition metals containing tetrazoles as ligands, semisynthetic tetrazolyl derivatives of natural compounds (biogenic acids, peptides, steroids, combretastatin, etc.), 5-oxo and 5- thiotetrazoles, and some other related compounds have been recognized as promising antineoplastic agents. This review presents a comprehensive analysis of modern approaches to synthesis of these tetrazole derivatives as well as their biological (anticancer) properties. The most promising structure types of tetrazoles to be used as anticancer agents have been picked out. Show less