Radical Beckmann Rearrangement and Its Application in the Formal Total Synthesis of Antimalarial Natural Product Isocryptolepine via C–H Activation
作者:Pankaj S. Mahajan、Vivek T. Humne、Subhash D. Tanpure、Santosh B. Mhaske
DOI:10.1021/acs.orglett.6b01634
日期:2016.7.15
ketoximes, mediated by ammonium persulfate-dimethyl sulfoxide as a reagent, has been achieved under neutral conditions. Based on the radical trapping and 18O-labeling experiments, the transformation follows a mechanism involving a radical pathway. The scope and generality of the developed protocol has been demonstrated by 19 examples. The developed protocol and Pd-catalyzed intramolecular double C–H
由过硫酸铵-二甲基亚砜作为试剂介导的酮肟的贝克曼重排已在中性条件下完成。基于自由基捕获和18 O-标记实验,转化遵循涉及自由基途径的机制。所开发协议的范围和通用性已通过19个示例得到了证明。已开发的方案和Pd催化的分子内双C–H双重活化被用作抗疟疾天然产物异隐油菜醇的正式总合成中的关键步骤。