A two step one-pot protocol for the umpolung of ketone enolates to enolonium species and addition of a nucleophile to the α-position is described. Nucleophiles include chloride, azide, azoles, allyl-silanes, and aromatic compounds.
Arava, S., Maksymenko, S., Parida, K. N., Pathe, G. K., More, A. M., Lipisa, Y. B., Szpilman, A. M. A Two-Step Protocol for Umpolung Functionalization of Ketones Via Enolonium Species. J. Vis. Exp. (138), e57916, doi:10.3791/57916 (2018).