New phosphitylating reagent in the nucleotide chemistry containing two 4-nitrophenoxy leaving groups. Remarkably fast and clean phosphitylations activated by DBU leading to thio- and seleno-oligonucleotides
作者:Jan Heliński、Wojciech Da¸bkowski、Jan Michalski
DOI:10.1016/0040-4039(93)85068-8
日期:1993.10
A new synthetic approach to modified oligonucleotides based on N,N′-diisopropyl-di-(4-nitrophenyl)phosphoroamidite1 is described. The procedure involves displacement of either 4-nitrophenoxy or diisopropylamino ligands. The former proceeds very fast in the presence of DBU, the latter requires activation by tetrazole. This method allows rapid and almost quantitative construction of modified nucleotides
描述了一种新的合成方法,用于修饰基于N,N'-二异丙基-二-(4-硝基苯基)亚磷酰胺1的寡核苷酸。该过程涉及4-硝基苯氧基或二异丙基氨基配体的置换。前者在存在DBU的情况下进展非常快,后者需要被四唑激活。这种方法可以快速,几乎定量地构建衍生自硫代磷酸和硒代磷酸的修饰核苷酸。