Pd-Catalyzed Asymmetric Synthesis of N-Allenyl Amides and Their Au-Catalyzed Cycloisomerizative Hydroalkylation: A New Route Toward Enantioenriched Pyrrolidones
作者:Audrey Boutier、Claire Kammerer-Pentier、Norbert Krause、Guillaume Prestat、Giovanni Poli
DOI:10.1002/chem.201103902
日期:2012.3.26
gold to cyclize them! Gold‐catalyzed cycloisomerizative hydroalkylation of N‐allenyl amides affords regioselectively 4‐vinyl‐γ‐lactams. This transformation is stereospecific and takes place with a total axis‐to‐center chirality transfer. The required enantioenriched N‐allenyl amide is successfully obtained from an original Pd‐catalyzed dynamic kinetic asymmetric transformation (see scheme).
钯使它们成环,黄金使它们环化!金催化的N-烯丙基酰胺基的环异构化加氢烷基化可选择性地产生4-乙烯基-γ-内酰胺。这种转换是立体特定的,并且发生了整个轴到中心的手性传递。从原始的Pd催化的动态动力学不对称转化中成功获得了所需的对映体富集的N-烯丙基酰胺(参见方案)。