双(2-取代-3-羟基-4-吡喃酮)合铜(II)配合物的合成和降血糖作用

合成了双(2-取代-3-羟基-4-吡喃酮)合铜(II)配合物, 采用元素分析、质谱、红外光谱、电子光谱、电子自旋共振谱表征了它们为平面正方型配合物, 中心离子和配体的物质的量比为1∶2. 在STZ-糖尿病小鼠模型上, 其中双(2-乙基-3-羟基-4-吡喃酮)合铜(II)在10 mg/kg的剂量下灌胃给药, 能增加血清胰岛素的合成和分泌、降低糖尿病小鼠的血糖水平, 显示出良好的抗糖尿病的作用. 该配合物毒性低, 对正常小鼠灌胃给药的半数致死量LD₅₀是855.9 mg/kg.

Synthesis and Anti-hyperglycemic Effect of Copper(II) Bis(2-substituted 3-hydroxy-4-pyronate)

Copper(II) bis(2-substituted 3-hydroxy-4-pyronate), where the substituent is CH₃/C₂H₅/CH₂OH, was synthesized by the reaction between CuCl₂ and sodium 2-substituted 3-hydroxy-4-pyronate in aqueous solution, followed by recrystallizaton in water. By using elemental analysis, IR, UV, MS and EPR spectra, their chemical structures were determined to be planar square complexes with 1∶2 molar ratio of Cu to the pyronate in a molecule. The complexes were submitted to the test of preliminary toxicity and anti-hyperglycemic effect on STZ-diabetic mice. The results show that one of the complexes, copper(II) bis(2-ethyl-3-hydroxy-4-pyronate), increased the synthesis and release of the serum insulin, and lowered the blood glucose level in mice at the dose of 10 mg/kg, exhibiting good anti-hyperglycemic activity. The complex was also safe with LD₅₀ of 855.9 mg/kg in healthy mice.