The generation of negatively charged species by treatment of dioxolanes with BuLi or via fluorodesilylation, results in the formation of new compounds, by spontaneous cycloelimination or upon quenching with C-electrophiles.
Regio- and Stereospecific Me<sub>3</sub>SiI-Promoted Intramolecular Displacement of Hydroxy Group by Sulfide. 2. Polyhydroxylated Thiepane Ring Contraction to Thiolane or Thiane Derivatives. Synthesis of Enantiopure Polyalcohols<sup>1</sup>