One-pot synthesis of 4-pyrimidone-2-thioether through base/acid-mediated condensation of <i>S</i>-alkylisothiourea and β-ketoester
作者:Zhichao Lu、Tsung-Yun Wong、Yonghong Gan、Guihui Chen、Dinesh J. Paymode、Cheng-yi Chen
DOI:10.1039/d4ra00039k
日期:——
4-Pyrimidone-2-thioethers can be useful synthetic precursors to densely functionalized pyrimidines, commonly encountered in bioactive molecules. A convenient one-pot access to 4-pyrimidone-2-thioethers is reported herein, which utilizes a sequential base- and acid-mediated condensation of alkylisothioureas with β-ketoesters. Owing to mild reaction conditions, good to excellent functional group tolerance
4-嘧啶酮-2-硫醚可作为生物活性分子中常见的密集功能化嘧啶的有用合成前体。本文报道了一种方便的一锅法获得4-嘧啶酮-2-硫醚的方法,其利用烷基异硫脲与β-酮酯的顺序碱和酸介导的缩合。由于反应条件温和,可实现良好至优异的官能团耐受性和产率。该方法的实用性通过 200 克规模的关键阿达格拉西中间体的合成得到了证明。