A highly divergent Pictet-Spengler approach for pyrrolo[1,2-a]quinoxalines from aryl amine using 1,2-dinitrobenzene as an oxidant
作者:Sachin D. Pardeshi、Bhausaheb N. Patil、Prashant Patil、Atul C. Chaskar
DOI:10.1016/j.tetlet.2019.151250
日期:2019.11
A convenient Pictet-splengler approach for the synthesis of substituted pyrrolo[1,2-a]quinoxaline from aryl amines and 1-(2-aminoaryl)-pyrrole has been developed. This is the first domino protocol involving formation of benzaldehyde as an intermediate from benzyl amines and benzyl alcohols using 1,2-DNB as an oxidant, followed by its endo cyclization with 1-(2-aminophenyl)-pyrrole to furnish the pyrrolo[1
开发了一种方便的Pictet-splengler方法,由芳基胺和1-(2-氨基芳基)-吡咯合成取代的吡咯并[1,2-a]喹喔啉。这是第一个多米诺骨牌方案,涉及使用1,2-DNB作为氧化剂由苄胺和苄醇形成苯甲醛作为中间体,然后将其与1-(2-氨基苯基)-吡咯进行内环化以提供吡咯并[1]。 ,2-a]喹喔啉。值得注意的是,该方法表现出良好的官能团耐受性以及良好至中等产率的吡咯并[1,2-a]喹喔啉。