Symmetric 4,6-dialkyl/arylamino-5-nitropyrimidines: theoretical explanation of why aminolysis of alkoxy groups is favoured over chlorine aminolysis in nitro-activated pyrimidines
作者:Laura Córdoba Gómez、Alvaro Lorente-Macias、María José Pineda de las Infantas y Villatoro、Andrés Garzón-Ruiz、Juan J. Diaz-Mochon
DOI:10.1039/d3nj03495j
日期:——
A new synthetic route to obtain symmetric disubstituted alkyl/arylaminopyrimidines under mild conditions is presented, which can be used to generate new purine libraries for drug discovery. We investigated the unexpected reaction of 6-alkoxy-4-chloro-5-nitropyrimidines with primary amines, which produced disubstituted dialkyl/arylamine pyrimidines instead of the expected 6-alkoxy-4-alkylamine-5-nitropyrimidines
提出了一种在温和条件下获得对称二取代烷基/芳基氨基嘧啶的新合成路线,可用于生成新的嘌呤库用于药物发现。我们研究了 6-烷氧基-4-氯-5-硝基嘧啶与伯胺的意外反应,产生二取代的二烷基/芳基胺嘧啶,而不是预期的 6-烷氧基-4-烷基胺-5-硝基嘧啶。为了阐明该反应,对反应机理进行了计算研究。我们的结果表明,预反应分子复合物的存在(一种在 SNAr 反应中很少报道的现象)出现在过渡态之前,可以促进反应。此外,迈森海默配合物和内在反应坐标(IRC)构型中的过渡态,