Palladium-Catalyzed Direct <i>N</i>-Arylation of Nucleosides, Nucleotides, and Oligonucleotides for Efficient Preparation of dG−<i>N</i><sup>2</sup> Adducts with Carcinogenic Amino-/Nitroarenes
作者:Takeji Takamura-Enya、Shigeki Enomoto、Keiji Wakabayashi
DOI:10.1021/jo0605243
日期:2006.7.1
A method for direct palladium-catalyzed N-arylation reaction of nucleobases was developed for the convenient synthesis of DNA adducts with carcinogenic compounds. Using xantphos as the phosphine ligand and tetraethylammonium fluoride as the base in DMSO, several o-iodonitroarenes could be efficiently coupled with 2‘-deoxyguanosine, 2‘-deoxyadenosine, and 2‘-deoxycytidine. The presence of a 3‘-phosphate
为了方便地与致癌化合物合成DNA加合物,开发了一种直接钯催化的核碱基N-芳基化反应的方法。在DMSO中使用黄磷作为膦配体,氟化四乙基铵作为碱,可以将几个邻碘硝基芳烃与2'-脱氧鸟苷,2'-脱氧腺苷和2'-脱氧胞苷有效偶联。发现在脱氧核糖部分中存在3'-磷酸基团与该N-芳基化反应相容。此外,寡核苷酸可以用作底物。偶联化合物(12)的简便硝基还原反应生成2'-脱氧鸟苷-N 2已知在生物学上很重要的-芳基胺加合物。化合物12易于转化为亚磷酰胺衍生物,可以在硝基还原后用芳基胺制备位点修饰的寡核苷酸。