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An all‐pericyclic manifold is developed for the construction of topologically diverse, structurally complex and natural product‐like polycyclic chemotypes. The manifold uses readily accessible tertiary propargyl vinyl ethers as substrates and imidazole as a catalyst to form up to two new rings, three new C−C bonds, six stereogenic centers and one transannular oxo‐bridge. The manifold is efficient,...
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