作者:Laurent El Kaïm、Laurence Grimaud、Simon Wagschal
DOI:10.1021/jo100759b
日期:2010.8.6
Herein, we present a newroute to highly substituted pyrrolo[2,3-d]pyrimidines featuring a Ugi−Smiles/Sonogashira cascade followed by an efficient base-catalyzed intramolecular cyclization. When formaldehyde is chosen as input in the Ugi−Smiles step, aromatic fused systems are eventually obtained through the isomerization of an exo-alkylidene intermediate.
在这里,我们提出了一种新的途径,以具有Ugi-Smiles / Sonogashira级联的高取代的吡咯并[2,3- d ]嘧啶为代表,随后进行了有效的碱催化分子内环化反应。当在Ugi-Smiles步骤中选择甲醛作为输入时,最终通过外亚烷基中间体的异构化获得芳族稠合体系。