Publication at Faculty of Science |
2012
Abstract
A new modular synthesis of diverse 2,4-disubstituted pyrimidin-5-yl C-2'-deoxyribonucleosides by sequential regioselective reactions of 2,6-dichloropyrimidin-5-yl C-nucleoside was developed. The intermediate was prepared by the Heck coupling of 2,6-dichloro-5-iodopyrimidine with glycal followed by desilylation and reduction.
Its mild nucleophilic substitutions or cross-coupling reactions proceeded regioselectively at position 4, while at elevated temperatures or with excess reagent, a double substitution occurred. The 2-chloro-4-substituted intermediates underwent another substitution or coupling to afford a two-dimensional library of diverse 2,4-disubstituted pyrimidin-5-yl C-2-deoxyribonucleotides.