Abstract
A general AuIII catalytic system is described for the efficient hydroxy- and alkoxycyclization reactions of 1,6-enynes. The reactions lead to carbo- and heterocyclic alcohols or ethers in good to excellent yields. The cyclizations are conducted in the presence of AuCl3/AgSbF6/PPh3 catalyst in dioxane-water or various alcohols at room temperature. The hydroxycyclization reactions of 1,7-enynes afforded either the methyl ketone or a mixture of the methyl ketone and the carbocyclic alcohol.
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