Discovery and properties of a new indigoid structure type based on dimeric cis-indigos.
Hyejin HongCassidy M ConoverDillon T HofsommerCorey A SanzRobin G HicksPublished in: Organic & biomolecular chemistry (2022)
Reactions of indigo with quinones in the presence of sodium hydride leads unexpectedly to products containing two indigo subunits; one indigo is featured in a cis configuration and fused via its indole nitrogen atoms to a second indigo at the central C-C bond of the latter. Structural, optical, and redox properties of the new compounds are reported.
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