Reinhard W. Hoffmann, Ralf Koberstein and Klaus Harms
The intramolecular carbolithiation of vinyl sulfides at –105 °C in THF has been found to be stereospecific regarding the formation of the new carbon–carbon bond and non stereospecific regarding the formation of the new carbon–lithium bond. The resulting α-durylthioalkyllithium compounds are configurationally stable at –105 °C and epimerize at –90 °C.