The anticancer activity of titanium complexes has been known since the groundbreaking studies of Köpf and Köpf-Maier on titanocen dichloride. Unfortunately, possibly due to their fast hydrolysis, derivatives of titanocen dichloride failed in clinical studies. Recently, the new family of titanium salan complexes containing tetradentate ONNO ligands with anti-cancer properties has been discovered. These salan complexes are much more stabile in aqueous media. In this study we describe the biological activity of two titanium salan complexes in a mouse model of cervical cancer. High efficiency of this promising complex family was demonstrated for the first time in vivo. From these data we conclude that titanium salan complexes display very strong antitumor properties exhibiting only minor side effects. Our results may influence the chemotherapy with metallo therapeutics in the future.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3061874 | PMC |
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0017869 | PLOS |
Dalton Trans
January 2025
Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan, 80708, Republic of China.
A series of aluminum complexes bearing phenolate (O-Al and O2-Al), biphenolate (OO-Al type), aminophenolate (ON-Al), aminobiphenolate (ONO-Al), bis(phenolato)bis(amine) (NNOO-Al), and Salan (ONNO-Al) type ligands were synthesized. ε-Caprolactone (CL) polymerization using these aluminum complexes as catalysts was investigated. The overall polymerization rates of Al catalysts with different ligands were found to be in the following order ( values): ONBr-Al (0.
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View Article and Find Full Text PDFJ Biol Inorg Chem
April 2024
Fachbereich Chemie, Universität Konstanz, Universitätsstr. 10, 78457, Konstanz, Germany.
Eighteen novel Ti(IV) complexes stabilized by different chelating amino-bis(phenolato) (ONNO, ONON, ONOO) ligands and 2,6-dipicolinic acid as a second chelator were synthesized with isolated yields ranging from 79 to 93%. Complexes were characterized by H and C-NMR spectroscopy, as well as by HRMS and X-Ray diffraction analysis. The good to excellent aqueous stability of these Ti(IV) complexes can be modulated by the substitutions on the 2-position of the phenolato ligands.
View Article and Find Full Text PDFBioorg Chem
May 2024
Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Biruni University, İstanbul, Türkiye.
In the present study, an intermediate namely 2-(3-bromopropylamino)-3-chloronaphthalene-1,4-dione was initially synthesized via the nucleophilic addition-elimination reaction between 2,3-dichloro-1,4-naphthoquinone and 3-bromo-1-aminopropane. Then a coupling reaction between the intermediate and piperazine derivatives yielded a number of 1,4-naphthoquinone derivatives. Spectroscopic analysis successfully characterized the products that were obtained in good yields.
View Article and Find Full Text PDFChem Asian J
May 2024
Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001, Lisboa, Portugal.
The reaction of Ti(NMe) with the salan ligand precursor HNOH led to the formation of [(L*)Ti(NHMe)] (L*=NO ) that forms [(HNO)TiCl] upon reaction with two equiv. of MeSiCl. [(L*)Ti(py)] was obtained from the reaction of [Ti(NBu)Cl(py)] with the sodium salt HNONa.
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