三唑2-氧化物的直接合成对N-杂环化学领域提出了挑战。一种新型铜(I)催化的烯胺酮亚硝基化/成环级联通过使用非腐蚀性物质形成新的C-N、N=N和N-N键,为生成1 H -1,2,3-三唑2-氧化物提供了直接途径亚硝酸叔丁酯 (TBN) 作为 N 源和 NO 源。该合成方案具有起始材料易于获取、底物范围广、对各种官能团具有良好的耐受性,同时避免使用爆炸性叠氮化物的特点。
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