A novel simple method, based on treatment with isoamyl nitrite (IAN) in DMSO without any added acid, to produce selective C(5)-nitrosation of aminopyrimidine derivatives is described. It proved to be suitable for a multigram scale and applicable to a larger range of pyrimidine derivatives, including amino-dialkoxypyrimidines, than the procedures previously known. Its scope is analyzed and some example on the usefulness of the newly prepared substances as intermediates in the synthesis of fused heterobicyclic derivatives of potential biological interest is presented.
描述了一种新颖简单的方法,该方法基于在无任何添加酸的
DMSO中用
异戊醇硝酸酯(IAN)处理,实现对
氨基嘧啶衍
生物的选择性C(5)-亚硝化。该方法证明适合于多克级规模,并且适用于比之前已知程序更广泛的
嘧啶衍
生物,包括
氨基-二烷氧基
嘧啶。分析了其适用范围,并展示了一些新制备物作为潜在
生物兴趣的融合杂环衍
生物合成中的中间体的实用性示例。