Synthetic Approaches to Nuclease-Resistant, Nonnatural Dinucleotides of Anti-Hiv Integrase Interest
摘要:
New, nonnatural dinucleotide 5'-monophosphates with a surrogate isonucleoside component of L-related stereochemistry, have been synthesized. Structures of the target compounds were confirmed by multinuclear NMR spectra (H-1, C-13, P-31, COSY), UV hypochromicity, FAB HRMS data and X-ray crystallography. These compounds are totally resistant to cleavage by 3'- and 5'-exonucleases. Dinucleotides of this study with a terminal L-isonucleoside component showed remarkable selectivity for inhibition of the strand transfer step of HIV-1 integrase. To the best of our knowledge, these compounds represent only the second example of this type of selectivity of inhibition of the strand transfer step.
A New Approach for the Synthesis of Novel 5‐Substituted Isodeoxyuridine Analogs
作者:Sven Guenther、Vasu Nair
DOI:10.1081/ncn-120027827
日期:2004.1.1
synthons for the preparation of isodeoxyuridines through direct nucleophilic substitution reactions. These substitution reactions have exceptional regioselectivity. The products of the reactions served as key precursors for the synthesis of 5‐substituted isodeoxyuridines via the Stille and Heck coupling reactions. Interestingly, unprotected nucleosides could be used in these metal‐mediated functionalizations