Synthesis of Spiroisoxazolines via an Oximation/Dearomatization Cascade under Air
作者:Dengfeng Chen、Tianyu He、Yuan Huang、Jinyue Luo、Fei Wang、Shenlin Huang
DOI:10.1021/acs.orglett.0c01429
日期:2020.6.5
transition-metal-free synthesis of spiroisoxazolines is outlined. This protocol provides, for the first time, a direct access to spiroisoxazolines from aryl (thio)ethers or (thio)phenols in one synthetic step via an oximation/dearomatization cascade. In this reaction, sodium nitrite plays dual roles: as a hydroxylamine source and also a precatalyst to promote the aerobic dearomatization. This methodology features
概述了螺异恶唑啉的无过渡金属催化合成。该方案首次在一个合成步骤中通过肟化/脱芳香化反应的级联,直接从芳基(硫)醚或(硫)酚中获得螺异恶唑啉。在该反应中,亚硝酸钠起着双重作用:既是羟胺源,又是促进有氧脱芳香化作用的前催化剂。这种方法具有前所未有的底物范围,高收率,可扩展性,可持续的氧化剂和温和的条件。