Golden cascades: Two diastereoselective gold‐catalyzed cascade processes in which propargyl acetates react with alkenes or 1,4‐dienes afford highly substituted five‐ and seven‐membered rings, respectively (see scheme). The concerted nature of the gold‐catalyzed Cope rearrangement has been used in the formal enantioselective synthesis of marine norsesquiterpenoids Frondosins A and B.
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