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.
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.
Investigations on substituted (2-aminothiazol-5-yl)(imidazo[1,2-a]pyridin-3-yl)methanones 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.bmc.2021.116091
日期:2021.4
A convenient synthesis of di- and trisubstituted 2-aminoimidazoles from 1-amidino-3-trityl-thioureas
作者:Jitendra C. Kaila、Arshi B. Baraiya、Amit N. Pandya、Hitesh B. Jalani、Kamala K. Vasu、V. Sudarsanam
DOI:10.1016/j.tetlet.2009.04.083
日期:2009.7
Convenient synthesis of 2-amino-1,5-disubstituted and 2-amino-1,4,5-trisubstituted imidazoles has been reported using readily available starting materials and simple reagents under mild conditions. Guanylation of 1-amidino-3-trityl-thioureas 1 and 7 using mercury(II) chloride (Caution) as a thiophile resulted in corresponding guanidines 2 and 8 which on reaction with alpha-bromo ketones yielded 2-tritylaminoimidazoles. Deprotection of 2-tritylaminoimidazoles using trifluoroacetic acid at room temperature furnished desired 2-aminoimidazoles 4 and 10 in good to moderate yields. (C) 2009 Elsevier Ltd. All rights reserved.