Hypervalent Iodine(III)‐Promoted Rapid Cascade Reaction of Quinoxalinones with Unactivated Alkenes and TMSN₃

The first example of rapidly three‐component cascade reaction of quinoxalinones with unactivated alkenes and TMSN 3 under mild condition has been described. This approach provides a practical solution for the rapid modification of quinoxalinones and enables new planning strategies for the synthesis of bioactive organoazides. A radical mechanism is responsible for this three‐component transformation. magnified image