Application of Primary Allylamine Derivatives of Baylis-Hillman Adducts to Heterocyclic Synthesis: Generation of 5-Benzyl-4(3<i>H</i>)-pyrimidinones and 2-Benzylidene-2,3-dihydropyrrolizin-1-ones
作者:Sanjay Batra、Somnath Nag、Sudharshan Madapa
DOI:10.1055/s-2007-990929
日期:2008.1
The applications of the primary allyl amines afforded by the acetyl derivative of Baylis-Hillman adducts of acrylate for the synthesis of heterocycles using robust reactions are described. In the first strategy a one-pot synthesis of 5-benzyl-4(3H)- pyrimidinones have been achieved via N-formylation of the amines in the presence of neat formamide followed by ammonium formate-mediated cyclization. These
描述了由丙烯酸酯的 Baylis-Hillman 加合物的乙酰基衍生物提供的伯烯丙胺在使用稳健反应合成杂环中的应用。在第一种策略中,5-苄基-4(3H)-嘧啶酮的单锅合成是通过在纯甲酰胺存在下胺的 N-甲酰化,然后是甲酸铵介导的环化来实现的。这些嘧啶酮已被证明是 4-吡啶胺衍生物的优良前体。在第二种策略中,2-亚苄基-2,3-二氢吡咯嗪-1-酮的合成是通过用二甲氧基呋喃处理烯丙胺,然后进行皂化和PPA介导的分子内环化来完成的。