Enantioselective Synthesis of Cyclic Nitrones by Chemoselective Intramolecular Allylic Alkylation of Oximes
作者:Tobias Sandmeier、Erick M. Carreira
DOI:10.1002/anie.202100150
日期:2021.4.26
The enantio‐ and chemoselective iridium‐catalyzed N‐allylation of oximes is described for the first time. Intramolecular kinetic resolution provides access to cyclic nitrones and enantioenriched aliphatic allylic alcohols. Salient features of this transformation are its ability to employ E/Z‐isomeric mixtures of oxime starting materials convergently and high functional group tolerance. The implementation
首次描述了对映体和化学选择性铱催化的肟的N-烯丙基化。分子内动力学拆分提供了获得环状硝酮和对映体富集的脂肪族烯丙基醇的途径。该转化的显着特征是其能够融合使用肟起始原料的E / Z-异构体混合物和高官能团耐受性。N-烯丙基/ 1,3-偶极环加成反应序列的实施以高度对映和非对映选择性的方式提供了三环异恶唑烷。该方法的综合效用通过海洋天然产物(+)-氯代氯的高效,正式合成得到了证明。