An Operationally Simple and Efficient Synthesis of Orthogonally Protected <scp>l</scp>-<i>threo</i>-β-Hydroxyasparagine
作者:Michael VanNieuwenhze、Aikomari Guzmán-Martínez
DOI:10.1055/s-2007-982544
日期:2007.6
A synthesis of orthogonally protected L-threo-beta-hydroxyasparagine from L-aspartic acid is reported. Iodocyclization of 3-benzoylaminoaspartic acid provided an intermediate oxazoline dicarboxylate that was efficiently hydrolyzed to L-threo-beta-hydroxyaspartic acid. The synthetic route for conversion of the free beta-hydroxy-alpha-amino acid into the target compound is highly efficient and amenable