Dithiane

A dithiane is a heterocyclic compound composed of a cyclohexane core structure wherein two methylene bridges are replaced by sulfur centres. The three isomeric parent heterocycles are 1,2-dithiane, 1,3-dithiane and 1,4-dithiane.

Quotes

 * The most utilized Umpolung strategy is based on formyl and acyl anion equivalents derived from 2-lithio- 1,3-dithiane species. These are readily generated from 1,3-dithianes (thioacetals) because the hydrogens at C(2) are relatively acidic (pKa~31).
 * George S. Zweifel and Michael H. Nantz, Modern Organic Synthesis (2006), Ch. 1. Synthetic Design