A conformational restriction approach to the development of dual inhibitors of acetylcholinesterase and serotonin transporter as potential agents for Alzheimer's disease
摘要:
Alzheimer's disease (AD) has been treated with acetylcholinesterase (AChE) inhibitors such as donepezil. However, the clinical usefulness of AChE inhibitors is limited mainly due to their adverse peripheral effects. Depression seen in AD patients has been treated with serotonin transporter (SERT) inhibitors. We considered that combining SERT and AChE inhibition could improve the clinical usefulness of AChE inhibitors. In a previous paper, we found a potential dual inhibitor, 1, of AChE (IC50 = 101 nM) and SERT (IC50 = 42 nM), but its AChE inhibition activity was less than donepezil (IC50 = 10 nM). Here, we report the conformationally restricted (R)-18a considerably enhanced inhibitory activity against AChE (IC50 14 nM) and SERT (IC50 = 6 nM). (C) 2003 Elsevier Ltd. All rights reserved.
A conformational restriction approach to the development of dual inhibitors of acetylcholinesterase and serotonin transporter as potential agents for Alzheimer's disease
摘要:
Alzheimer's disease (AD) has been treated with acetylcholinesterase (AChE) inhibitors such as donepezil. However, the clinical usefulness of AChE inhibitors is limited mainly due to their adverse peripheral effects. Depression seen in AD patients has been treated with serotonin transporter (SERT) inhibitors. We considered that combining SERT and AChE inhibition could improve the clinical usefulness of AChE inhibitors. In a previous paper, we found a potential dual inhibitor, 1, of AChE (IC50 = 101 nM) and SERT (IC50 = 42 nM), but its AChE inhibition activity was less than donepezil (IC50 = 10 nM). Here, we report the conformationally restricted (R)-18a considerably enhanced inhibitory activity against AChE (IC50 14 nM) and SERT (IC50 = 6 nM). (C) 2003 Elsevier Ltd. All rights reserved.
Palladium-Catalyzed C(sp<sup>2</sup>)–H Olefination of Free Primary and Secondary 2-Phenylethylamines: Access to Tetrahydroisoquinolines
作者:Shuai Fan、Yongzheng Ding、Xiaoxi Chen、Yuzhen Gao、Lei Fu、Shangda Li、Gang Li
DOI:10.1021/acs.joc.9b01769
日期:2019.10.18
A rapid construction of THIQs by a Pd(II)-catalyzed C(sp(2))-H olefination of free primary and secondary 2-phenylethylamines with high step- and atom-economy was reported. Notably, no substituent was required at the alpha-position to the amino group of the 2-phenylethylamines. The substrate scope was broad, and the reaction could also be applied to generate THIQs from the biologically active molecules such as the drug molecule baclofen and phenylalanine ester.