Efficient and Regioselective 9-<i>Endo</i> Cyclization of α-Carbamoyl Radicals
作者:Liyan Song、Kun Liu、Chaozhong Li
DOI:10.1021/ol201180g
日期:2011.7.1
With the promotion of Lewis acid BF3•OEt2, various N-(hex-5-enyl)-2-iodoalkanamides underwent efficient and regioselective 9-endo iodine-atom-transfer radicalcyclization reactions at room temperature. The cyclized products were readily converted to the corresponding azonan-2-ones by reduction with Bu3SnH or to hexahydroindolizin-3(5H)-ones by treatment with aqueous Na2CO3 in a one-pot, two-stage manner
随着路易斯酸BF 3 •OEt 2的促进,在室温下,各种N-(hex-5-enyl)-2-iodaalkanamides进行了有效和区域选择性9-内碘原子转移自由基的环化反应。通过用一锅,两步方式用Na 2 CO 3水溶液处理,通过用Bu 3 SnH还原,可以容易地将环化产物转化为相应的氮杂-2-酮,或将其通过Na 2 CO 3水溶液处理而转化为六氢吲哚嗪-3(5 H)-酮。