Alkynyl-2-deoxy-d-riboses, a cornucopia for the generation of families of C-nucleosides
作者:Mauro F.A. Adamo、Roberto Pergoli、Maria Moccia
DOI:10.1016/j.tet.2010.09.046
日期:2010.11
This study focuses on the preparation of some 1-alkynyl-2-deoxy-d-riboses and their application to the generation of C-nucleosides analogues. Examples are provided in which the alkyne functionality took part in alkylation or cycloaddition reactions. A discussion of the protecting group used is provided.
Using the copper(I)-catalyzed alkyne-azide 1,3-dipolar cycloaddition, a post-elongation modification of 1-ethynyl substituted nucleobases has been employed to construct 18 variations of oligonucleotides from a common oligonucleotide precursor. The triplex-forming ability of each oligonucleotide with dsDNA was evaluated by the UV melting experiment. It was found that triazole nucleobases generally tend to exhibit binding affinities in the following order: CG > TA > AT, GC base pairs. Among the triazole nucleobases examined, a 1-(4-ureidophenyl)triazole provided the best result with regard to affinity and selectivity for the CG base pair. (C) 2011 Elsevier Ltd. All rights reserved.