Thermal [2+2] intramolecular cycloadditions of fuller-1,6-enynes.


The transition-metal-catalyzed cyclization of enynes (mostly 1,6-enynes) 1 has been extensively studied as it provides a powerful method for the construction of carboand heterocyclic systems (2–5) in a simple manner (Scheme 1). Cycloisomerization of enynes to form novel diene structures is currently a major challenge both synthetically and mechanistically… (More)

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