REPLACEMENT OF THE PHOSPHODIESTER LINKAGE IN OLIGONUCLEOTIDES BY HETEROCYCLES - SYNTHESIS OF THYMIDINE DINUCLEOTIDE ANALOGS WITH TRIAZOLE-MODIFIED BACKBONES
P. Vonmatt et al., REPLACEMENT OF THE PHOSPHODIESTER LINKAGE IN OLIGONUCLEOTIDES BY HETEROCYCLES - SYNTHESIS OF THYMIDINE DINUCLEOTIDE ANALOGS WITH TRIAZOLE-MODIFIED BACKBONES, Bioorganic & medicinal chemistry letters, 7(12), 1997, pp. 1549-1552
Novel backbone-modified dinucleotide analogs of types V and VI have be
en synthesized, where the natural phosphodiester linkage of a T-T dinu
cleotide has been replaced by a triazole heterocycle. The key step of
the synthesis is the regioselective, thermal cycloaddition of a 2-oxoa
lkylidene triphenylphosphorane with an azide derivative to generate th
e triazole ring. (C) 1997 Elsevier Science Ltd.