Your wish is my command: Deracemization is a powerful strategy wherein a racemate is converted into a 100 % yield of a single enantiopure product. A new concept in catalyticderacemization is presented, in which a racemate with n stereogenic elements can be selectively converted into each one of 2m (m=number of chiral centers of the product) different enantiopure products, by simple tuning of the reaction
new atom‐economical method for the synthesis of functionalized cyclobutenes has been developed. This versatile sequence hinges upon a unique combination of an elegant photochemical isomerization and a palladium‐catalyzed alkylation, and converts the readily available, “flat” aromatic 2‐pyrone into a variety of functionalized products with exquisite stereoselectivity.