In control: The novel and enantioselective total synthesis of (−)‐quinocarcin includes the highly stereoselective preparation of the 2,5‐cis‐pyrrolidine by intramolecular amination, a selective substrate‐controlled 6‐endo‐dig intramolecular alkyne hydroamination with a cationic AuI catalyst, and Lewis‐acid‐mediated ring‐opening/halogenation sequence.
The totalsynthesis of the pentacyclic tetrahydroisoquinoline alkaloid quinocarcin, which possesses intriguing structural and biological features, has been achieved through a gold(I)‐catalyzed regioselective hydroamination reaction. It is noteworthy that the regioselectivity of the intramolecular hydroamination of an unsymmetrical alkyne could be completely switched through substrate control. Other