Synthesis of α-CF<sub>3</sub>-Substituted Carbonyl Compounds with Relative and Absolute Stereocontrol Using Electrophilic CF<sub>3</sub>-Transfer Reagents
Evans-type chiral lithium imideenolates undergo diastereoselective α-trifluoromethylation with a hypervalent iodine–CF3 reagent with up to 91% combined isolated yield and 97:3 dr. The resulting isolated diastereopure products can be further transformed into valuable products without racemization.