All articles of this category An efficient one-pot process involving palladium-catalyzed dehydrative cyclization, hydroxyl group deprotection and spiroketalization is described and offers an easy access to the tricyclic spiroketal framework of phyllanthocin. Tetrahydrobenzofurans - spiroketals - palladium catalyst - heterocyclization - diastereoselective - C-O bond formation
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Tenaglia et al. (1996) studied this question.