Synthesis of Benzofurans<i>via</i>Tandem Rhodium-Catalyzed C(<i>sp</i><sup>3</sup>)H Insertion and Copper-Catalyzed Dehydrogenation
作者:Lin Li、Xiao-Han Xia、Yong Wang、Pranjal P. Bora、Qiang Kang
DOI:10.1002/adsc.201500396
日期:2015.6.15
approach for the synthesis of benzofuran derivatives (up to 88% yield) from 1‐sulfonyl‐1,2,3‐triazoles has been developed. The cascade reaction involves sequential rhodium‐catalyzed C(sp3)H insertion and copper‐catalyzed aerobic oxidation. The method was made more convenient towards the synthesis of benzofurans starting from terminal alkynes via a one‐pot sequential copper‐catalyzed alkyne‐azide cycloaddition
已开发出一种顺序催化的级联方法,用于从1-磺酰基-1,2,3-三唑合成苯并呋喃衍生物(最高收率88%)。级联反应包括连续的铑催化的C(sp 3)H插入和铜催化的有氧氧化。通过一锅顺序铜催化炔-叠氮化物环加成(CuAAC)/ CH插入/脱氢级联反应,从末端炔烃开始合成苯并呋喃更加方便。而且,在吲哚骨架的合成中证明了级联方法的效用。