A review report from Hu, Teng, and co-workers compiles good literature on the Recent advances in palladium-catalyzed sulfonylation via SO2 insertion. Sulfonyl-group-containing compounds such as sulfinates, sulfones, sulfonamides, and sulfonyl fluorides are an important class of compounds that exist in various natural products and pharmaceutical drugs. This review summarized the recent progress in the Pd-catalyzed sulfonylation via SO2 insertion. The authors have mainly focussed on elucidating scopes along with the unsolved challenges that have been disclosed in the presented review. Also, authors have little enlighten the mechanistic pathways involved in sulfonylation. Moreover, the author has also discussed their perspectives on this highly active research field. The topic is very interesting and important. So, this paper should be useful for organic chemists. However, English should be checked by a native English speaker as some sentences need to be corrected. So, this reviewer believes this review can only be suitable for publication after the minor revision.

Concerns/comments shall be addressed before resubmission:

1. The abstract needs to be rewritten, where the author needs to discuss the manuscript's importance.

2. The author shall more emphasize discussing each reaction pathway and all the processes involving the reaction mechanism so that the reader will benefit from this review article.

3. The author shall write a full form of any reagent/compound before writing the short form. For example, the author shall define DABA, DABSO, and other termologies as the author has done for TBAB.

4. The author shall try to keep one theme of work in one segment and another theme in another place, as it will help readers understand the progress of the work.