The total synthesis of tanshinone IIA and related bioactive diterpenes isolated from the Chinese plant Salvia miltiorrhiza was completed from a common tetralin building block. The synthetic route highlights a 3,4-disubstituted furan synthesis and various regioselective C–H functionalization reactions, including a Pd catalyzed iodination and an Ir catalyzed borylation, along with an intramolecular stanna-Brook type reaction to construct the ortho-quninone ring of the target molecule.
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Tucker et al. (2024) studied this question.
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