Factors conducive to the cascade rearrangement of sterically congested and geometrically restricted three-membered rings. Facile synthesis of a topologically nonplanar heterocycle

Epoxydation du trimethylene-2,8,9 [3.3.3] propellane en stereoisomeres tris-epoxymethylene-2,2:8,8:9,9; ces epoxydes se rearrangent en heterocycle non planaire (trioxahexaquinane); de la meme facon, l'epoxydation des diethylene-2,8 ethylene-9,9- et diethylene-2,2:8,8 ethylene-9 [3.3.3] propellanes conduit aux mono- et diepoxydes correspondants; le monoepoxyde se rearrange en derive formyl. Hydrolyse du triethylene-2,2:8,8:9,9 [3.3.3] propellane