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Total syntheses of the dimeric tetrahydroxanthone natural products secalonic acids A and D are described. Key steps involve kinetic resolution of the tetrahydroxanthone core structure using homobenzotetramisole catalysis and late‐stage copper(I)‐mediated homodimerization of complex aryl stannane monomers.
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Qin et al. (2014) studied this question.
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