One monomeric orsellinate (1) suffices for a highly efficient total synthesis of the dimeric coumarins kotanin, isokotanin A, and desertorin C. The reason is the unselective course of its oxidative phenolic coupling, which leads to three regioisomeric biaryls as precursors of the dimers.
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Drochner et al. (2003) studied this question.
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