A vinylogous Norrish reaction as a strategy for light-mediated ring expansion
Chemical Communications(2022)
Abstract
The reactions of bicyclic divinyl ketones display wavelength-dependent changes in product formation. UV irradiation results in the formation of competitive [6,3,5] and [7,3,5] tricyclic unsaturated ketones that subsequently undergo ring expansion and reaction with a range of nucleophiles. DFT calculations and transient absorption experiments were completed that are consistent with a vinylogous Type II Norrish pathway.
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Key words
Visible Light Photoredox Catalysis
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