Facile Construction of Furanoacenes by a Three‐Step Sequence Going through Disilyl‐exo‐cyclic Dienes

Facile synthesis of various benzonaphthofurans was achieved by intramolecular hydroarylation of 1,4‐disilyl‐2‐aryloxy‐1,3‐enynes followed by cycloaddition with arynes or alkenes and finally desilylaromatization. The three‐step transformation can be operated sequentially in one‐pot, providing with a range of furanoacenes easily and highly effectively. Furanoacenes: Facile synthesis of various benzonaphthofurans was achieved from 1,4‐disilyl‐2‐aryloxy‐1,3‐enynes by hydroarylation, cycloaddition with arynes or alkenes, and desilylated aromatization. These three reactions could be operated sequentially in one‐pot, being highly effective and providing a range of furanoacene products easily.