Nickel‐Catalyzed Transannulation Reaction of 1,2,3,4‐Benzothiatriazin‐1,1(2<i>H</i>)‐dioxide with Alkyne and the Detailed Investigation of Reaction Mechanism

Abstract Herein, we provide two nickel complexes and a series of control experiments to study the mechanism of the nickel‐catalyzed transannulation reaction of 1,2,3,4‐benzo‐thiatriazin‐1,1(2 H )‐dioxide with aryne and alkyne in detail. In addition, we provide a new protocol for the cycloaddition of 1,2,3,4‐benzothiatriazin‐1,1(2 H )‐dioxide with alkyne on the basis of a similar reaction pathway.