In(OTf)<sub>3</sub>-catalysed one-pot versatile pyrrole synthesis through domino annulation of α-oxoketene-N,S-acetals with nitroolefins
作者:Abhijeet Srivastava、Gaurav Shukla、Anugula Nagaraju、Girijesh Kumar Verma、Keshav Raghuvanshi、Raymond C. F. Jones、Maya Shankar Singh
DOI:10.1039/c4ob00781f
日期:——
In(OTf)3-catalyzed robust and sustainable one-pot access to previously unknown and synthetically demanding polysubstituted pyrroles via [3 + 2] annulation of α-oxoketene-N,S-acetals with β-nitrostyrenes has been achieved under solvent-free conditions. The merit of this domino Michael addition/cyclization sequence is highlighted by its operational simplicity, short reaction time (5–10 min), good to
在无溶剂条件下,通过[3 + 2]α-氧代草酮-N与S-乙缩醛与β-硝基苯乙烯的环化反应,可以实现In(OTf)3催化的一锅通行的方法,可轻松获得以前未知且合成要求严格的多取代吡咯情况。这种多米诺骨牌迈克尔加成/环化序列的优点在于其操作简单,反应时间短(5-10分钟),良好至优异的收率,对各种官能团的耐受性以及产生两个新官能团的效率(C- C和C–N)键和一个高度官能化的吡咯环可在一次操作中完成,这使其成为现有方法的理想替代品。