Expeditious synthesis of 5,6,7,8-tetrahydro-imidazo[1,2-a]pyrimidin-2-ones and 3,4,6,7,8,9-hexahydro-pyrimido[1,2-a]pyrimidin-2-ones
作者:Richa Pathak、Sanjay Batra
DOI:10.1016/j.tet.2007.06.115
日期:2007.9
convenient synthesis of new 5,6,7,8-tetrahydro-imidazo[1,2-a]pyrimidin-2-ones and 3,4,6,7,8,9-hexahydro-pyrimido[1,2-a]pyrimidin-2-ones from the Baylis–Hillman adducts of acrylonitrile and their derivatives is described. A common strategy employed to achieve the syntheses of title compounds involved generation of diamines from different Baylis–Hillman derivatives followed by treatment with cyanogen bromide
新5,6,7,8-四氢-咪唑并[1,2的方便合成一个]嘧啶-2-酮和-3,4,6,7,8,9-六氢-嘧啶并[1,2一描述了来自丙烯腈的Baylis-Hillman加合物的] pyrimidin-2-ones及其衍生物。用于合成标题化合物的常用策略涉及从不同的Baylis-Hillman衍生物生成二胺,然后在回流温度下用溴化氰处理以引发双分子内环化。