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Synlett
DOI: 10.1055/a-2642-9128
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Visible-light-induced I2-mediated cyclization of ortho-biarylchalcones of naphthofuran series towards oxa[5]helicenes

Valerii Shirinian 
1   Laboratory of Heterocyclic Compounds, FSBIS N D Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Moscow, Russian Federation (Ringgold ID: RIN68429)
,
Alexey V. Zakharov
1   Laboratory of Heterocyclic Compounds, FSBIS N D Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Moscow, Russian Federation (Ringgold ID: RIN68429)
,
Eva E. Evsikova
2   Laboratory of Heterocyclic Chemistry, FSBIS N D Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Moscow, Russian Federation (Ringgold ID: RIN68429)
,
Polina D. Grebennikova
3   Laboratory of Heteocyclic Chemistry, FSBIS N D Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Moscow, Russian Federation (Ringgold ID: RIN68429)
,
Maria A. Krylova
2   Laboratory of Heterocyclic Chemistry, FSBIS N D Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Moscow, Russian Federation (Ringgold ID: RIN68429)
› Author Affiliations
Supported by: Russian Science Foundation RSF- 23-73-01123
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This work presents a novel, eco-friendly, transition metal-free method for synthesizing oxa[5]helicenes via visible-light-induced photocyclization of ortho-biarylchalcones of naphthofuran series. It was found that the obtained compounds are highly stable to both UV (365 nm) and visible light (LED420) irradiation in the presence of atmospheric oxygen or molecular iodine.



Publication History

Received: 15 May 2025

Accepted after revision: 25 June 2025

Accepted Manuscript online:
25 June 2025

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