Cover Feature: Efficient One‐Pot Multifunctionalization of Alkynes en Route to α‐Alkoxyketones, α‐Thioketones, and α‐Thio Thioketals by using an Umpolung Strategy (Chem. Eur. J. 57/2017)

N-alkenoxypyridinium salts, generated from the corresponding activated alkynes using a gold(I) catalyst, showed unconventional umpolung activity. This umpolung strategy not only offers highly valuable and unprecedented alternatives for the synthesis of various α-alkoxyketones, α-thioketones and α-thio thioketals, but also has the potential of revolutionizing the enolate umpolung chemistry. More information can be found in the Communication by X. Zhou et al. on page 14133.