Kinetic Resolution of Secondary Allyl Boronates and Their Application in the Synthesis of Homoallylic Amines
作者:Laura Villar、Nikolai V. Orlov、Nikolay S. Kondratyev、Uxue Uria、Jose L. Vicario、Andrei V. Malkov
DOI:10.1002/chem.201804395
日期:2018.11.2
chromatographically‐stable secondary allyl boronates featuring a 1,1,2,2‐tetraethyl‐1,2‐ethanediol fragment (Epin) were obtained by kinetic resolution of their racemic mixtures. The Epin group at boron considerably improved stability of allyl boronates allowing them to be readily isolated by chromatography on silica. The resolved reagents were applied in stereoselective synthesis of homoallylic amines with an internal
通过动力学拆分外消旋混合物,可得到高度对映体富集,色谱稳定的仲丁基硼酸仲烷基酯,具有1,1,2,2-四乙基-1,2-乙二醇片段(Epin)。硼上的Epin基团大大提高了烯丙基硼酸酯的稳定性,使它们易于通过硅胶色谱法分离。使用由醛和氨原位形成的未保护的亚胺,将拆分的试剂应用于具有内部双键的均聚烯丙基胺的立体选择性合成中。反应以极好的手性转移进行。