Asymmetric Total Synthesis of (−)-Leuconoxine via Chiral Phosphoric Acid Catalyzed Desymmetrization of a Prochiral Diester
作者:Kazuhiro Higuchi、Shin Suzuki、Reeko Ueda、Norifumi Oshima、Emiko Kobayashi、Masanori Tayu、Tomomi Kawasaki
DOI:10.1021/ol5033865
日期:2015.1.2
The asymmetric total synthesis of (−)-leuconoxine has been achieved. The desymmetrization of a prochiral diester using a chiral phosphoric acid catalyst produced a highly enantioenriched lactam with excellent yield. The ring construction featuring an intramolecular N-acyliminium cyclization and the one-step pyrrolidone formation using Bestmann’s ylide was successfully accomplished.
(-)-leuconoxine的不对称全合成已经实现。使用手性磷酸催化剂对前手性二酯进行脱对称化可得到高对映体富集的内酰胺,收率极好。成功实现了分子内N-酰基环化和使用Bestmann ylide一步形成吡咯烷酮的环结构。