Design, Synthesis, and Characterization of Novel Cyclotriphosphazene Derivatives Bearing Triazole and Quinoline Moieties: Molecular Docking with Human Serum Albumin and Toxicity Properties
Abstract
In this study, novel tetra- and di-substituted cyclotriphosphazene derivatives (5-8) were designed, synthesized, and characterized by mass, FT-IR, and NMR (1H, 13C, and 31P) spectroscopies. An organic–inorganic hybridization strategy was employed to design the target compounds. A three-step synthetic route, consisting of nucleophilic substitution and click reactions, was used to construct the desired derivatives. As a result, cyclotriphosphazene-based compounds bearing both triazole and quinoline heterocyclic moieties on the phosphazene core were successfully obtained. Molecular docking studies evaluated the interactions of the synthesized compounds with Human Serum Albumin (HSA), and toxicity properties were predicted with ProTox 3.0. The binding energies of compounds 5, 6, 7, and 8 to HSA were -10.5, -10.9, -13.5, and -14.1 kcal/mol, respectively, and these compounds showed stronger binding than the co-crystallized ligand, warfarin (-10.0 kcal/mol). According to ProTox 3.0, the estimated oral toxic dose was found to be 10,000 mg/kg for compounds 5 and 6, while 1,000 mg/kg for compounds 7 and 8, respectively. The GHS toxicity class is VI for compounds 5 and 6 and IV for compounds 7 and 8, indicating low to moderate acute oral toxicity.
Keywords
Cyclotriphosphazene, Hybrid molecules, Human serum albumin, Quinoline, Triazole
References
- Chandrasekhar, V., Thilagar, P., Pandian, B. M. (2007). Cyclophosphazene-based multi-site coordination ligands. Coordination Chemistry Reviews, 251(9-10), 1045-1074. https://doi.org/10.1016/j.ccr.2006.07.005
- Saltık, P. K., Şenkuytu, E., Ozguven, S. Y., Beynek, N., & Çiftçi, G. Y. (2025). Novel tryptamine decorated cyclotriphosphazene derived Schiff base compounds: Synthesis, characterization and molecular docking studies. Journal of Molecular Structure, 1321(3), 140024. https://doi.org/10.1016/j.molstruc.2024.140024
- Cemaloğlu, R., Asmafiliz, N., Hökelek, T., Kılıç, Z., Açık, L., Sabah, B. N., Koyunoğlu, D., Özbük, M. (2025). Phosphorus-nitrogen compounds: Part 79. Design and synthesis of spiro-bino-spiro (sbs)-bis (tetraalkylaminocyclotriphosphazenes) and novel twenty-membered bis (dichlorocyclotriphos-phaza) macrocycles: Structural analysis, chirality and bioactivity studies. Journal of Molecular Structure, 1335, 141926. https://doi.org/10.1016/j.molstruc.2025.141926
- Zhou, X., Qiu, S., He, L., Wang, X., Zhu, Y., Chu, F., Wang, B., Song, L., Hu, Y. (2021). Synthesis of star-shaped allyl phosphazene small molecules for enhancing fire safety and toughness of high performance BMI resin. Chemical Engineering Journal, 425, 130655. https://doi.org/10.1016/j.cej.2021.130655
- Zhang, S., Zhao, X., Li, B., Bai, C., Li, Y., Wang, L., Wen R., Zang, M., Ma, L., Li, S. (2016). Stereoscopic" 2D super-microporous phosphazene-based covalent organic framework: design, synthesis and selective sorption towards uranium at high acidic condition. Journal of Hazardous Materials, 314, 95-104. https://doi.org/10.1016/j.jhazmat.2016.04.031
- Uslu, A., Tümay, S. O., Yeşilot, S. (2022). Fluorescent materials based on phosphazene derivatives and their applications: Sensors and optoelectronic devices. Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 53, 100553. https://doi.org/10.1016/j.jphotochemrev.2022.100553
- Alam, M. M. (2022). 1, 2, 3‐Triazole hybrids as anticancer agents: A review. Archiv der Pharmazie, 355(1), 2100158. https://doi.org/10.1002/ardp.202100158
- Aher, N. G., Pore, V. S., Mishra, N. N., Kumar, A., Shukla, P. K., Sharma, A., Bhat, M. K. (2009). Synthesis and antifungal activity of 1, 2, 3-triazole containing fluconazole analogues. Bioorganic & Medicinal Chemistry Letters, 19(3), 759-763. https://doi.org/10.1016/j.bmcl.2008.12.026
- El Malah, T., Nour, H. F., Satti, A. A., Hemdan, B. A., El-Sayed, W. A. (2020). Design, synthesis, and antimicrobial activities of 1, 2, 3-triazole glycoside clickamers. Molecules, 25(4), 790. https://doi.org/10.3390/molecules25040790
- Musa, A., Abulkhair, H. S., Aljuhani, A., Rezki, N., Abdelgawad, M. A., Shalaby, K., El-Ghorab, A. H., Aouad, M. R. (2023). Phenylpyrazolone-1, 2, 3-triazole hybrids as potent antiviral agents with promising SARS-CoV-2 main protease inhibition potential. Pharmaceuticals, 16(3), 463. https://doi.org/10.3390/ph16030463