72.4
44.8
62.1
40.0
39.1
60.9
C11
C5
C10
In conclusion, we have presented an efficient method for the synthesis of functionalized chroman-4-ones induced by visible light via
the radical cyclization reaction of sulfinic acids and o-(allyloxy)arylaldehydes. The corresponding products were isolated with
moderate to good yields. Radical mechanism was proposed for this transformation. We believe that this method to access chroman-4-
ones has the potential for multiple applications, and more reactions for synthesizing highly functionalized chroman-4-ones induced by
visible light may be presented. Further studies into the reaction mechanism and bioactivity are ongoing in our lab.
Declaration of interests
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to
influence the work reported in this paper.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 21772107), and Shandong Province Key Research
and Development Plan (No. 2019GSF108017). We also thank Cai-Zhen Ding, Yan-Li Wang and Hong-Di Yang for their useful help.
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