Iron-Catalyzed Arene C–H Amidation Using Functionalized Hydroxyl Amines at Room Temperature
作者:A. V. G. Prasanthi、Samiyara Begum、Hemant Kumar Srivastava、Sandip Kumar Tiwari、Ritesh Singh
DOI:10.1021/acscatal.8b02939
日期:2018.9.7
Herein, we report Fe(III)(TPP)Cl as an effective catalyst for promoting arene C–H amidation through intramolecular cyclization of N-tosyloxyarylcarbamate substrates. The reaction proceeds via nitrene (outer sphere pathway) C(sp2)–H insertion to yield benzoxazolones under external-oxidant-free conditions at ambient temperature. The method is operationally simple and scalable with high-functional-group
在本文中,我们报道了Fe (III)(TPP)Cl是通过N-甲苯磺酰氧基芳基氨基甲酸酯底物的分子内环化作用促进芳烃CH酰胺化的有效催化剂。该反应通过氮(外球途径)C(sp 2)–H插入进行,在环境温度下在无外部氧化剂的条件下生成苯并恶唑酮。该方法操作简单且可扩展,并且具有高功能组公差。初步的实验和计算数据表明,亲电芳香取代反应参与了芳基CH酰胺化反应,这与以前报道的基于叠氮化物的芳基CH胺化反应的操作机理不同。