In recent decades, enantioselective protonation of prochiral enolates has become a practical means of accessing α-chiral carbonyl compounds with high enantiomeric purity.[1] The majority of work in this area has focused on the enantioselective protonation of isolated enolate precursors, such as silyl enol ethers.[2] Silyl enol ethers derived from α-substituted cyclic ketones have been most widely studied, owing to the fixed enolate geometry ...