摘要:
                                Novel backbone-modified dinucleotide analogs of types V and VI have been synthesized, where the natural phosphodiester linkage of a T-T dinucleotide has been replaced by a triazole heterocycle. The key step of the synthesis is the regioselective, thermal cycloaddition of a 2-oxoalkylidene triphenylphosphorane with an azide derivative to generate the triazole ring. (C) 1997 Elsevier Science Ltd.