Type 1 diabetes currently relies solely on subcutaneous insulin injections for treatment, with no alternative medication available. The solution involves providing therapeutic materials that can be orally administered as an alternative to insulin. The proposed solution is a zinc (II) organic complex containing compounds with a 3-hydroxy-4H-pyran-4-selenone structure with a γ-pyrone ring and its derivatives as ligands, which exhibit insulin-like action and blood glucose-lowering effects. These materials have the potential to replace existing diabetes treatment drugs. No figures are included in the text.
Synthesis of first row transition metal selenomaltol complexes
作者:Michael T. Spiegel、Amanda Hoogerbrugge、Shamus Truksa、Andrew G. Smith、Kevin L. Shuford、Kevin K. Klausmeyer、Patrick J. Farmer
DOI:10.1039/c8dt01170b
日期:——
We report an efficient, one-step synthesis of the chelator 3-hydroxy-2-methyl-4-selenopyrone (selenomaltol). Complexes of selenomaltol with Fe(III), Ni(II), Cu(II) and Zn(II) have been prepared and studied by NMR, X-ray crystallography, cyclic voltammetry, EPR and electronic absorption. The Ni(II) and Cu(II) complexes show chemically reversible oxidations which are suggested to be ligand-based. Nuclear
Diabetes mellitus (DM) is a serious problem worldwide and is becoming increasingly prevalent. Previously, we reported the use of various zinc (Zn) complexes as new anti-diabetic agents. In this study, we synthesized novel organo-selenium (Se) Zn complexes with hydroxy-pyrone derivatives that have a Zn(Se2O2) coordination mode. The results of in vitro insulin-mimetic analyses showed that the compound bis(3-hydroxy-2-methyl-4(H)-pyran-4- seleno)Zn ([Zn(hmps)(2)]) exhibited the strongest activity among all the complexes. In the in vivo studies of Zn complexes with 3-hydroxy-2-methyl-4(H)-pyran-4-one, maltol, (hmpo) derivatives, [Zn(hmps)(2)] exhibited a stronger anti-diabetic effect than bis(3-hydroxy-2-methyl-4(H)-pyran-4-one)Zn ([Zn(hmpo)(2)]), which had a Zn (O-4) coordination mode. Additionally, we investigated the organ distribution of both Zn and Se by determining the amounts of these elements in the organs of [Zn(hmps)(2)]-administered mice. We then evaluated the effect of treatment with Zn complexes on hepatic lipid accumulation and pancreatic islet hypertrophy by hematoxylin and eosin (HE) histological staining. Zn complexes were found to improve the hypertrophy in the pancreas. There were some reports that Se-contaming Zn complexes such as di(2-selenopyridine-N-oxidato)Zn(II) ([ZPS]) were effective for treating diabetes mellitus, so in this study, we examined different types of zinc complexes with organo-selenium ligands.
Selenomaltol — Synthesis, Spectroscopy and Theoretical Calculations
作者:Waldemar Tejchman、Krzysztof Zborowski、Wieslaw Lasocha、Leonard M. Proniewicz
DOI:10.3987/com-08-11337
日期:——
Synthesis and structure of the seleno derivative of maltol (selenomaltol) is described. Structural and energetical properties of possible selenomaltol structures have been calculated at the B1LYP/6-311++G(d,p) level. The lowest energies are always predicted for the keto-enol tautomer. To verify obtained results several standard experimental methods, namely: elemental analysis, mass spectrometry, infrared and NMR spectroscopies and X-ray crystallography have been used. Investigation of IR and NMR spectra clearly indicate that the oxygen atom of exocyclic keto group oil maltol was replaced by selenium. Experimental crystallographic results support this conclusion.