An Electron‐Rich [4]Radialene

Abstract

A new type of bis(diazo) compound, a stable, electron-rich [4] radialene, and an unusual pentacyclic polyketal are the fruits of this investigation. Catalytic decomposition of silane 1 produces the tricyclic compound 2, whose four-membered ring is folded at an angle of 35.0°. Acid hydrolysis of 2 gives the tetra(oxahomo)cubane 3.