A general protocol for the photoinduced dehalocyclization of ortho-halophenylacrylamides with formate has been reported using a CO₂ radical anion to access substituted oxindoles.

Comprehensive Summary

Herein, we report an efficient and practical protocol for the photoinduced dehalocyclization of ortho-halophenylacrylamides with formate by the engagement of a CO₂ radical anion to access substituted oxindoles. This method proceeds smoothly under mild conditions and exhibits a wide range of substrate as well as remarkable functional group compatibility.