The diastereoselective asymmetric total synthesis of NG-391, a neuronal cell-protecting molecule
作者:Yujiro Hayashi、Junichiro Yamaguchi、Mitsuru Shoji
DOI:10.1016/s0040-4020(02)01290-5
日期:2002.12
The stereocontrolled total synthesis of (+)-NG-391, a neuronal cell-protecting molecule, is described along with the determination of its absolute stereochemistry. The following reactions in this synthesis are particularly noteworthy: (1) The stereoselective construction of the conjugated (E,E,E,E,E)-pentaene from an (E,E,E)-alcohol using an IBX oxidation followed by stereoselective Horner-Emmons reaction. (2) The (E)-selective Knoevenagel condensation of a beta-ketonitrile with a chiral 2-alkoxyaldehyde prepared from (S)-malic acid. (3) A diastereoselective epoxidation. (C) 2002 Elsevier Science Ltd. All rights reserved.