The synthesis of pyridoacridines related to the ascididemins can be performed by an intramolecular aza-DielsâAlder cycloaddition of an α,β-unsaturated hydrazone to a quinone followed by an unprecedented rearrangement to yield benzo- or pyrido-[b]acridine-6,11-diones.
通过δ,δ-不饱和腙与醌的分子内偶氮-DielsâAlder 环加成反应,然后进行前所未有的重排,生成苯并
吖啶或
吡啶并[b]
吖啶-6,11-二酮,从而合成与
抗坏血酸有关的
吡啶并
吖啶。