An Olefination Entry for the Synthesis of Enantiopure α,ω-Diaminodicarboxylates and Azabicyclo[<i>X</i>.<i>Y</i>.0]alkane Amino Acids
作者:Francis Gosselin、William D. Lubell
DOI:10.1021/jo9814602
日期:1998.10.1
beta-keto phosphonates 21-23. The power of this approach for making azabicyclo[X.Y.0]alkane aminoacid was then illustrated by the first synthesis of enantiopure indolizidin-9-one aminoacid 2 in nine steps and >25% overall yield from inexpensive aspartic acid as chiral educt. Hydrogenation of (2S,8S)-di-tert-butyl 4-oxo-2,8-bis[N-(PhF)amino]non-4-enedioate (24) in 9:1 EtOH:AcOH furnished a 9:1 diastereomeric