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Synthesis of visible-light mediated tryptanthrin derivatives from isatin and isatoic anhydride under transition metal-free conditions

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Abstract

Visible-light mediated synthesis of diverse tryptanthrin derivatives catalyzed by an organic dye has been achieved. An energy transfer reaction process leads to the self-condensation of isatin, as well as the cross-condensation of isatin and isatoic anhydride. The irradiation of the reaction mixture with a 23 W fluorescent bulb in the presence of Rose Bengal provides a transition metal-free, environmentally friendly and inexpensive alternative approach to synthesize this important heterocycle.

Graphical abstract: Synthesis of visible-light mediated tryptanthrin derivatives from isatin and isatoic anhydride under transition metal-free conditions

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Publication details

The article was received on 19 Aug 2017, accepted on 17 Sep 2017 and first published on 18 Sep 2017


Article type: Research Article
DOI: 10.1039/C7QO00740J
Citation: Org. Chem. Front., 2018, Advance Article
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    Synthesis of visible-light mediated tryptanthrin derivatives from isatin and isatoic anhydride under transition metal-free conditions

    H. Hou, H. Li, Y. Han and C. Yan, Org. Chem. Front., 2018, Advance Article , DOI: 10.1039/C7QO00740J

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