A Cs2CO3-mediated simple and selective method for the alkylation and acylation of 3,4-dihydropyrimidin-2(1H)-thiones
作者:Salil Putatunda、Arijit Chakraborty
DOI:10.1016/j.crci.2013.12.006
日期:2014.10
excellent yields in the presence of Cs2CO3, a mild base. The method evidences a selective S-alkylation when using acyl chlorides as efficient acylating agents at room temperature on the 2-thioxo-dihydropyrimidone moiety. A possible mechanistic interpretation of the different selectivities in case of alkylation and acylation was done with the help of a geometry optimization process.
摘要 在 Cs2CO3(一种弱碱)存在下,合成了 3,4-二氢嘧啶-2(1H)-硫酮的烷基和酰基衍生物,收率非常好。该方法证明了在室温下使用酰氯作为 2-硫代-二氢嘧啶酮部分上的有效酰化剂时的选择性 S-烷基化。在几何优化过程的帮助下,对烷基化和酰化的不同选择性进行了可能的机械解释。