Pharmacological investigation of quinoxaline-bisthiazoles as multitarget-directed ligands for the treatment of Alzheimer’s disease
摘要:
Alzheimer's disease (AD) is the most prevalent disease of old age leading to dementia. Complex AD pathogenesis involves multiple factors viz. amyloid plaque formation, neurofibrillary tangles and inflammation. Herein we report of a new series of quinoxaline-bisthiazoles as multitarget-directed ligands (MTDLs) targeting BACE-1 and inflammation concurrently. Virtual screening of a library of novel quinoxaline-bisthiazoles was performed by docking studies. The most active molecules from the docking library were taken up for synthesis and characterized by spectral data. Compounds 8a-8n showed BACE-1 inhibition in micro molar range. One of the compounds, 8n showed BACE-1 inhibition at IC50 of 3 +/- 0.07 mu M. Rat paw edema inhibition in acute and chronic models of inflammation were obtained at 69 +/- 0.45% and 55 +/- 0.7%, respectively. Compound 8n also showed noteworthy results in AlCl3 induced AD model. The treated rats exhibited excellent antiamnesic, antiamyloid, antioxidant, and neuroprotective properties. Behavioural parameters suggested improved cognitive functions which further validates the testimony of present study. Moreover, compound 8n was found to have inherent gastrointestinal safety. This new string of quinoxaline-bisthiazoles were identified as effective lead for the generation of potent MTDLs and compound 8n was found to showcase qualities to tackle AD pathogenesis.
The multi-step synthesis of 1,3,7-trisubstituted pyrimido[1,2-a]pyrimidinediones starting from isothiocyanates is described. These nitrogen bicycles were prepared by an iterative sequence of functionalization/cyclocondensation reactions. [4+2] Cycloaddition reactions took place between diazadienic chains and various acyl chlorides providing sophisticated heterobicycles.
描述了从异硫氰酸酯开始的1,3,7-三取代嘧啶并[1,2- a ]嘧啶二酮的多步合成。这些氮自行车是通过功能化/环缩合反应的迭代序列制备的。[4 + 2]环加成反应发生在二氮杂二烯链与提供复杂杂环的各种酰氯之间。
Synthesis of Functionally Substituted 1,3-Diaza-1,3-butadienes
作者:S. N. Mazumdar、M. P. Mahajan
DOI:10.1055/s-1990-26892
日期:——
Three methods for the synthesis of various stable 1,3-diaza-1,3-butadienes from easily available thiourea derivatives are reported.
报道了三种从易得的硫脲衍生物合成各种稳定的1,3-二氮-1,3-丁二烯的方法。
Pharmacological investigation of quinoxaline-bisthiazoles as multitarget-directed ligands for the treatment of Alzheimer’s disease
作者:Sneha R. Sagar、Devendra Pratap Singh、Rajesh D. Das、Nirupa B. Panchal、Vasudevan Sudarsanam、Manish Nivsarkar、Kamala K. Vasu
DOI:10.1016/j.bioorg.2019.102992
日期:2019.8
Alzheimer's disease (AD) is the most prevalent disease of old age leading to dementia. Complex AD pathogenesis involves multiple factors viz. amyloid plaque formation, neurofibrillary tangles and inflammation. Herein we report of a new series of quinoxaline-bisthiazoles as multitarget-directed ligands (MTDLs) targeting BACE-1 and inflammation concurrently. Virtual screening of a library of novel quinoxaline-bisthiazoles was performed by docking studies. The most active molecules from the docking library were taken up for synthesis and characterized by spectral data. Compounds 8a-8n showed BACE-1 inhibition in micro molar range. One of the compounds, 8n showed BACE-1 inhibition at IC50 of 3 +/- 0.07 mu M. Rat paw edema inhibition in acute and chronic models of inflammation were obtained at 69 +/- 0.45% and 55 +/- 0.7%, respectively. Compound 8n also showed noteworthy results in AlCl3 induced AD model. The treated rats exhibited excellent antiamnesic, antiamyloid, antioxidant, and neuroprotective properties. Behavioural parameters suggested improved cognitive functions which further validates the testimony of present study. Moreover, compound 8n was found to have inherent gastrointestinal safety. This new string of quinoxaline-bisthiazoles were identified as effective lead for the generation of potent MTDLs and compound 8n was found to showcase qualities to tackle AD pathogenesis.