Triphenylphosphine-free approach for one-pot N-alkylation of purine, pyrimidine, and azole derivatives with alcohols using P2O5/KI: A facile and selective route to access carboacyclic nucleosides
作者:Somayeh Behrouz、Mohammad Navid Soltani Rad、Samira Ahmadi
DOI:10.1016/j.tet.2019.130499
日期:2019.9
A facile, selective, and mild synthetic approach for one-pot N-alkylation of nucleobases and other related N-heterocycles via alcohols, using a mixture of P2O5 and KI is described. The reaction of structurally diverse purines, pyrimidines, and/or azoles with primary alcohols with the use of P2O5/KI and basic mixture of Et3N/K2CO3 in refluxing DMF affords the corresponding N-alkyl derivatives (carboacyclic
描述了一种使用P 2 O 5和KI的混合物通过醇通过一锅法对核碱基和其他相关N-杂环进行N-烷基化的简便,选择性和温和的合成方法。使用P 2 O 5 / KI和Et 3 N / K 2 CO 3的碱性混合物,使结构不同的嘌呤,嘧啶和/或唑与伯醇反应在回流中,DMF以良好至合理的产率得到相应的N-烷基衍生物(碳环核苷)。评估了包括溶剂,碱,温度和底物/试剂比率的不同参数对反应进程的影响。仲和叔醇不能与核碱基反应。当前方案的主要优点是形成水溶性副产物,其中提供了简单的后处理和纯化过程。