2,4-Dinitrophenol: a novel activating reagent in nucleotide synthesis via the phosphoramidite route. Design of new effective phosphitylating reagents
作者:Wojciech Dąbkowski、Izabela Tworowska、Jan Michalski、Friedrich Cramer
DOI:10.1016/s0040-4039(00)01178-3
日期:2000.9
2,4-Dinitrophenol (DNP) is a remarkably efficient activator in the reaction of P(III) amides with nucleosides to give P(III) esters in excellent yield. Typical examples of this novel procedure are presented herein. Mechanistic features of the activation were elucidated by model studies of the reaction of bis(2-cyanoethyl)diisopropylphosphoroamidite with benzyl alcohol. The importance of the initial
2,4-二硝基苯酚(DNP)是P(III)酰胺与核苷反应生成P(III)酯的极有效的活化剂。本文介绍了这种新颖程序的典型示例。通过对双(2-氰基乙基)二异丙基亚磷酰胺与苄醇反应的模型研究,阐明了活化的机理特征。31 P NMR光谱和独立合成清楚地证明了质子化初始阶段和形成中间P(III)-2,4-二硝基苯酯的重要性。含有2,4-二硝基苯氧基的新的磷酸化试剂不需要任何活化。