Synthesis, characterization and theoretical evaluations of HMDS promoted chemoselective O-alkylation of uracils
作者:Mehdi Bakavoli、Hossein Eshghi、Ali Shiri、Toktam Afrough、Javad Tajabadi
DOI:10.1016/j.tet.2013.07.025
日期:2013.9
The sodium salts of the conjugated bases of uracils undergo highly chemoselective O4-monoalkylation when treated with various alkyl halides in dry DMF, while the use of methyl iodide results in N1+N3-dimethylation. Theoretical evaluations of the chemo- and regioselectivity along with X-ray crystallographic data are presented.
当在干燥的DMF中用各种烷基卤处理时,尿嘧啶的共轭碱的钠盐经历高度化学选择性的O 4-单烷基化,而使用甲基碘导致N 1 + N 3-二甲基化。提出了化学和区域选择性的理论评估以及X射线晶体学数据。