Capture du paradiméthoxyorthoquinodiméthane: synthèses de quinones et d'un intermédiaire de la daunomycinone

New para-dimethoxyl and para-diacetoxy derivatives in the naphthalene, anthracene, naphthacene, naphtho (2,3-c) thiophene and benzo-c thiophene series are synthesized via the trapping of o-quinodimethanes by various dienophiles. Among these compounds, an intermediate for the synthesis of daunomycinone has been prepared and can be oxidized to a benzoquinone which provides access to new analogues of this important antileukemic agent. [Journal translation]