Structural Features of Azidopyridinyl Neonicotinoid Probes Conferring High Affinity and Selectivity for Mammalian α4β2 and <i>Drosophila</i> Nicotinic Receptors
作者:Nanjing Zhang、Motohiro Tomizawa、John E. Casida
DOI:10.1021/jm010508s
日期:2002.6.1
toxicity of neonicotinoid insecticides such as N-(6-chloropyridin-3-ylmethyl)-2-nitroiminoimidazolidine (imidacloprid) to insects than mammals is due in large part to target site specificity at the corresponding nicotinicacetylcholine receptors (nAChRs). We propose that neonicotinoids with a protonated N-unsubstituted imine or equivalent substituent recognize the anionic subsite of the mammalian alpha4beta2
Control of RNA with quinone methide reversible acylating reagents
作者:Hyun Shin Park、Biswarup Jash、Lu Xiao、Yong Woong Jun、Eric T. Kool
DOI:10.1039/d1ob01713f
日期:——
improving reversal rates and yields, we have designed novel acylating reagents that utilize quinonemethide (QM) elimination for reversal. The QM de-acylation reactions were tested with two bioorthogonally cleavable motifs, azide and vinyl ether, and their acylation and reversal efficiencies were assessed with NMR and mass spectrometry on model small-molecule substrates as well as on RNAs. Successful reversal