作者:Emmanuel Riguet、Jérôme Désiré、Christian Bailly、Jean-Luc Décout
DOI:10.1016/j.tet.2004.06.122
日期:2004.9
In the search for molecules possessing antibiotic or antiviral properties and ribonuclease like activity, that is, able to induce the cleavage of bacterial or viral RNA targets, we report a new route for preparing selectively neamine derivatives modified at their 4- and/or 5-hydroxyl functions. Using trityl protective groups for the amino functions and 4-methoxybenzyl groups for the hydroxyl functions, new neamine derivatives, such as histidine, phenanthroline, flavin, adenine conjugates were efficiently obtained after a single deprotection step under acid conditions. For the first time, 4-modified neamine derivatives were prepared. Most of the 4'-derivatives showed affinity and selectivity for TAR RNA close to those of the corresponding 5-derivatives. The most potent compound is the 4'-histidine derivative 31 which binds more tightly to TAR RNA compared to its 5-isomer and neamine and recognizes selectively TAR oligonucleotides having a bulge. (C) 2004 Elsevier Ltd. All rights reserved.