Enantiodivergent Synthesis of (+)- and (−)-Pyrrolidine 197B: Synthesis of<i>trans</i>-2,5-Disubstituted Pyrrolidines by Intramolecular Hydroamination
作者:Sixto J. Pérez、Martín A. Purino、Daniel A. Cruz、Juan M. López-Soria、Rubén M. Carballo、Miguel A. Ramírez、Israel Fernández、Víctor S. Martín、Juan I. Padrón
DOI:10.1002/chem.201602708
日期:2016.10.17
A highly efficient, diastereoselective, iron(III)‐catalyzed intramolecular hydroamination/cyclization reaction involving α‐substituted amino alkenes is described. Thus, enantiopure trans‐2,5‐disubstituted pyrrolidines and trans‐5‐substituted proline derivatives were synthesized by means of a combination of enantiopure starting materials, easily available from l‐α‐amino acids, with sustainable metal
描述了涉及α-取代的氨基烯烃的高效,非对映选择性,铁(III)催化的分子内加氢胺化/环化反应。因此,对映纯的反式2,5-二取代的吡咯烷和反式-5-取代的脯氨酸衍生物是通过将对映纯的原料(可容易地从l -α-氨基酸获得)与可持续的金属催化剂如铁(III)合成而合成的)盐。该方法的范围以对映异构方法从l-谷氨酸合成(+)-和(-)-吡咯烷197B生物碱中得到了强调。另外,进行了计算研究以深入了解转化的完全非对映选择性。