tert-Butyl Nitrite-Induced Radical Nitrile Oxidation Cycloaddition: Synthesis of Isoxazole/Isoxazoline-Fused Benzo 6/7/8-membered Oxacyclic Ketones
作者:Jian-Kang Cao、Tian-Zheng Cao、Qian-Wen Yue、Ying Ma、Chuan-Ming Yang、Hong-Xi Zhang、Ya-Chen Li、Qiao-Ke Dong、Yan-Ping Zhu、Yuan-Yuan Sun
DOI:10.3390/molecules29061202
日期:——
A practical metal-free and additive-free approach for the synthesis of 6/7/8-membered oxacyclic ketone-fused isoxazoles/isoxazolines tetracyclic or tricyclic structures is reported through Csp3–H bond radical nitrile oxidation and the intramolecular cycloaddition of alkenyl/alkynyl-substituted aryl methyl ketones. This convenient approach enables the simultaneous formation of isoxazole/isoxazoline
通过Csp3-H键自由基腈氧化和烯基/炔基的分子内环加成,报道了一种实用的无金属和无添加剂合成6/7/8元氧杂环酮稠合异恶唑/异恶唑啉四环或三环结构的方法-取代的芳基甲基酮。这种方便的方法通过使用亚硝酸叔丁酯(TBN)作为非金属自由基引发剂和N-O片段供体,能够同时形成异恶唑/异恶唑啉和6/7/8元氧杂环酮,从而形成多环结构。