Nucleoside 3′-N,N-Dialkylphosphonamidates as novel nucleotide units for the solution-phase oligonucleotide synthesis
作者:Takeshi Wada、Kazushige Ishikawa、Tsujiaki Hata
DOI:10.1016/s0040-4020(01)86304-3
日期:1993.3
3′-N,N,-diisopropylphosphonamidate building blocks for oligonucleotide synthesis were prepared in high yields from appropriately protected nucleosides by use of chlorobis(N,N,-diisopropylamino)phosphine as a phosphitylating reagent. The 5′-dimethoxytrityl group of the nucleoside 3′-N,N-diisopropylphosphonamidates was removed selectively without cleavage of the P-N bond under mild acidic conditions
通过使用氯代双(N,N,-二异丙基氨基)膦作为磷酸化试剂,由适当保护的核苷以高收率制备用于寡核苷酸合成的核苷3'-N,N,-二异丙基氨基膦酸酯结构单元。在温和的酸性条件下,可选择性除去核苷3'-N,N-N,N-二异丙基膦酰胺的5'-二甲氧基三苯甲基,而不会裂解PN键。发现核苷3'-N,N-二异丙基膦酰胺酸酯对叔丁基氢过氧化物的氧化具有抗性。尝试使用磷酸亚氨基酯结构单元向5'-和3'-方向延伸链,并合成了三胸苷酸。发现核苷3'-N,N,N-二异丙基膦酰胺可能用作溶液相寡核苷酸合成的3'-末端核苷酸单元。