Alzheimer’s disease (AD) is the most common cause of dementia among elderly. Many studies have suggested that AD are related to a low level of acetylcholine (ACh), an essential neurotransmitter to promote learning and memory in the brain, due to neurologic destruction and enzymatic-catalyst hydrolysis through acetylcholinesterase (AChE). Thus, AChE inhibition is targeted as a goal for AD treatment. Acetylcholinesterase inhibitors (AChEIs) such as galantamine, donepezil, and rivastigmine are currently used as first-line therapy for mild to moderate AD. Among the drugs, donepezil inhibits AChE activity through the interaction with amino acids at peripheral anionic site (PAS) of the enzyme which consequently hinders Aβ aggregation. Whereas, rivastigmine possesses AChE inhibitory activity in a pseudo-reversible manner via carbamylation with serine at catalytic site (CS). In this study, a new series of compounds which pseudo-reversibly inhibit AChE activity and interact with amino acid at PAS of the enzyme was designed. Coumarin moiety was selected as a core structure for PAS interaction and an additional carbamate group was choosen as a key functionality involving the carbamylation reaction at CS of the enzyme. A 7-hydroxycoumarin is linked to a phenyl carbamate with various spacer lengths from a 2-methylene unit to a 7-methylene unit). Among these compounds, RKNU153 and RKNU154 possess
Alzheimer’s disease (AD) is the most common cause of dementia among elderly. Many studies have suggested that AD are related to a low level of acetylcholine (ACh), an essential neurotransmitter to promote learning and memory in the brain, due to neurologic destruction and enzymatic-catalyst hydrolysis through acetylcholinesterase (AChE). Thus, AChE inhibition is targeted as a goal for AD treatment. Acetylcholinesterase inhibitors (AChEIs) such as galantamine, donepezil, and rivastigmine are currently used as first-line therapy for mild to moderate AD. Among the drugs, donepezil inhibits AChE activity through the interaction with amino acids at peripheral anionic site (PAS) of the enzyme which consequently hinders Aβ aggregation. Whereas, rivastigmine possesses AChE inhibitory activity in a pseudo-reversible manner via carbamylation with serine at catalytic site (CS). In this study, a new series of compounds which pseudo-reversibly inhibit AChE activity and interact with amino acid at PAS of the enzyme was designed. Coumarin moiety was selected as a core structure for PAS interaction and an additional carbamate group was choosen as a key functionality involving the carbamylation reaction at CS of the enzyme. A 7-hydroxycoumarin is linked to a phenyl carbamate with various spacer lengths from a 2-methylene unit to a 7-methylene unit). Among these compounds, RKNU153 and RKNU154 possess
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