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The first total synthesis of motualevic acids A–E, isolated from Siliquariaspongia sp., starting from commercially available 1,10-decanediol, is described. The key steps in the synthetic sequence involve stereoselective olefination, Corey–Fuchs reaction, and amide coupling.
The use of Cu(OTf) 2 as a catalyst for tandem hydroalkoxylation–hydroarylation reaction of alkynes tethered with hydroxyl group is reported. The reaction proceeds at 60°C or even at room temperature with 5mol% catalyst loading and produces C-3-substituted indoles in good to high yields. The method was shown to be applicable to a broad range of indoles, containing electron-withdrawing and electron-donating...
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