Design and synthesis of novel 3-substituted-indole derivatives as selective H3 receptor antagonists and potent free radical scavengers
作者:Li Tang、Liying Zhao、Lingjuan Hong、Fenyan Yang、Rong Sheng、Jianzhong Chen、Ying Shi、Naimin Zhou、Yongzhou Hu
DOI:10.1016/j.bmc.2013.07.051
日期:2013.10
A series of novel 3-substituted-indole derivatives with a benzyl tertiary amino moiety were designed, synthesized and evaluated as H-3 receptor antagonists and free radical scavengers for Alzheimer's disease therapy. Most of these synthesized compounds exhibited moderate to potent antagonistic activities in CREs driven luciferase assay. In particular, compound 2d demonstrated the most favorable H-3 receptor antagonistic activity with the IC50 value of 0.049 mu M. Besides, it also displayed high binding affinity to H-3 receptor (K-i = 4.26 +/- 2.55 nM) and high selectivity over other three histamine receptors. Moreover, 2d and other two 3-substituted indole derivatives 1d and 3d exerted potent ABTS radical cation scavenging capacities similar to melatonin. Above results illustrate that 2d is an interesting lead for extensive optimization to explore new drug candidate for AD therapy. (C) 2013 Elsevier Ltd. All rights reserved.