Stereospecific Synthesis of Cyclic Hydrazoacetic Acids and meso-Diaminodicarboxylic Acids

摘要

The hetero Diels-Alder adducts 6a-d derived from azodibenzoyl and cyclic dienes were oxidized by ruthenium tetroxide and transformed into meso-diaminodicarboxylic acids 12a-d via the new cyclic hydrazoacetic acids 9a-d.