PrCparation stCrCosClective de mCthyle cCtones a-bromCes: stCrCochimie de l'addition d'anions en a d'un groupe sulfone sur des cyclohexanones monocycliques et stCro~diques

This work describes stereochemical results obtained for the preparation of α-bromomethyl ketones or α-bromoaldehydes starting from monocyclic and steroid cyclohexanones, using the Durst method. In all the cases studied here, the bromine is introduced selectively in the equatorial position. However, for monocyclic compounds, the yields of α-bromocarbonyl compounds are limited by the competitive formation of α-ethylenic carbonyl compounds.