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Access to Substituted Dihydrothiopyrano[2,3‑b]indoles via Sequential Rearrangements During S‑Alkylation and Au-Catalyzed Hydroarylation on Indoline-2-thiones

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posted on 2015-05-15, 00:00 authored by Mukund Jha, Ganesh M. Shelke, T. Stanley Cameron, Anil Kumar
An efficient methodology for the synthesis of indole-fused dihydrothiopyrans has been developed from indoline-2-thiones. The protocol involves the synthesis of conjugated ene-yne-substituted indole-sulfides, a gold­(III)-catalyzed rearrangement of the ene-yne side chain followed by intramolecular hydroarylation via C3–H functionalization of the indole core. This new synthesis of functionalized tricyclic indole derivatives through sequential rearrangements is quite general in nature

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