The reactions of 5-alkyl-6-(2,6-dihalobenzyl)-2-thioxo-1,2-dihydropyrimidin-4(3H)-one with 2-methyloxirane in an alkaline medium afforded uracil and 2-[(2-hydroxyprop-1yl)sulfanyl]pyrimidin-4(3H)-one derivatives. The mechanism proposed for these transformations was studied using the DFT/B3LYP/311+G** quantum chemical method, and the influence of the Nathan—Baker effect on the chemical nature and composition of the reaction products was shown.
在碱性介质中,5-烷基-6-(
2,6-二卤
苄基)-2-
硫酮-1,2-二
氢嘧啶-4(3H)-
酮与
2-甲基环氧乙烷反应生成了尿
嘧啶和 2-[(2-羟基丙-1-基)
硫]
嘧啶-4(3H)-
酮衍
生物。利用 DFT/B3LYP/311+G** 量子
化学方法对这些转化的机理进行了研究,并显示了 Nathan-Baker 效应对反应产物
化学性质和组成的影响。