Structure−Activity Relationships for a Series of Bis(phenylalkyl)amines: Potent Subtype-Selective Inhibitors of N-Methyl-d-aspartate Receptors
摘要:
A series of bis(phenylalkyl)amines, structural analogues of ifenprodil and nylidrin, were synthesized and tested for antagonism of N-methyl-D-aspartate (NMDA) receptors. Potency and subunit selectivity were assayed by electrical recordings in Xenopus oocytes expressing three binary combinations of cloned rat NMDA receptor subunits: NR1A expressed in combination with either NR2A, NR2B, or NR2C. The bis(phenylalkyl)amines were selective antagonists of NR1A/2B receptors. Assayed under steady-state conditions, the most potent of these, N-[2-(4-hydroxyphenyl)ethyl]-5-phenylpentylamine hydrochloride (20), has an IC50 value of 8 nM and > 1000-fold selectivity with respect to NR1A/2A and NR1A/2C receptors. The structure-activity relationship of the bis(phenylalkyl)amine series indicates that the piperidine ring and alkyl chain substitutions common to NR2B-selective antagonists such as ifenprodil, CP 101,606, and Ro 25-6981 are not necessary to generate potent and selective ligands. The primary determinants of potency are the phenolic OH group, acting as a hydrogen bond donor, the distance between the two rings, and an electrostatic interaction between the receptor and the basic nitrogen atom. This study provides a framework for designing structurally novel NR2B-selective antagonists which may be useful for treatment of a variety of neurological disorders.
Two‐Step Protocol for Iodotrimethylsilane‐Mediated Deoxy‐Functionalization of Alcohols
作者:Yuming Chen、Ru He、Hongjian Song、Guoqing Yu、Chenglin Li、Yuxiu Liu、Qingmin Wang
DOI:10.1002/ejoc.202001602
日期:2021.2.19
protocol for iodotrimethylsilane‐mediated deoxy‐functionalization of primary and secondaryalcohols was described. This protocol involves iodination of alcohol and then replaced by a N, S, or O nucleophile. Compared with traditional Mitsunobureaction, non‐acidic pre‐nucleophiles can be used in this protocol and configuration of alcohols can be retained.