Highly enantioselective relay catalysis in the three-component reaction for direct construction of structurally complex heterocycles.

A highly enantioselective three-component cascade reaction, consisting of an enantioselective [4+2] cycloaddition reaction catalyzed by chiral phosphoric acid and a subsequent catalytic intramolecular hydroamination by gold(I) complex, provides a unique method to access structurally diverse julolidine derivatives in high optical purity.