6-苄基-3-芳基-7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类化合物的合成及其乙酰胆碱酯酶抑制活性

目的初步探讨6-苄基-3-芳基-7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类化合物的合成及其乙酰胆碱酯酶(ACh E)抑制活性。方法以苯甲醛和乙酰甘氨酸作为初始原料,经Erlenmeyer-Pl9chl反应、缩合反应、水解反应、缩合反应,生成取代的6-苄基-3-硫代-1,2,4-三嗪-5(2H)-酮类化合物,再与取代的α-氯代苯乙酮反应,得到6-苄基-3-(羟基芳基)-7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类化合物。该化合物经Williamson反应制备得到9个6-苄基-3-芳基-7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类化合物。结果合成了9个6-苄基-3-芳基-7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类目标化合物。体外ACh E抑制活性筛选表明,所有目标化合物均具有ACh E抑制活性,其中有5个化合物在10μmol·L^(-1)浓度水平抑制活性超过了50%。结论综合体外ACh E抑制活性和分子对接结果,发现6-苄基-3-芳基-7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类化合物可与ACh E的阴离子亚位点和外周活性位点区发生相互作用,具有一定的ACh E抑制活性。

Synthesis and biological activity of 3,6-diaryl-7H-thiazolo[3,2-b][1,2,4]triazin-7-one derivatives as novel acetylcholinesterase inhibitors

Acetylcholinesterase inhibitors played significant roles in treatment of Alzheimer's disease.Based on the research foundation of our previous work and molecular modeling,twelve 3,6-diaryl-7H-thiazolo[3,2-b][1,2,4]triazin-7-one derivatives were synthesized and characterized by mass spectra,infrared spectra,NMR and elemental analyses.The study of AChE inhibitory activity was carried out using the Ellman colorimetric assay with huperzine-A as the positive control.All target compounds exhibited more than 40% inhibition at 10 μM.Some target compounds showed good inhibition against AChE.The preliminary structure-activity relationships were the halogen atoms at the phenyl ring at the C6 position,the hydroxy groups and the long side chains at the phenyl ring at the C3 position of the parent nucleus played significant roles in the AChE inhibitory activity of the target compounds.