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  • Title: Au/Ag-catalyzed intramolecular ring-opening of vinylidene-cyclopropanes (VDCPs): an easy access to functional tetrahydropyrans.
    Author: Li W, Yuan W, Pindi S, Shi M, Li G.
    Journal: Org Lett; 2010 Mar 05; 12(5):920-3. PubMed ID: 20141165.
    Abstract:
    An intramolecular ring-opening of vinylidenecyclopropanes (VDCPs) tethered with alcohol chains has been established. A series of transition metal catalysts and their combinations have been screened under mild conditions, and a cocatalyst system consisting of [(Ph(3)PAu)(3)O]BF(4) (4 mol %) and AgOTf (4 mol %) was found to catalyze the reaction to completion within 10-30 min in 1,4-dioxane at 60 degrees C to give allene-functionalized tetrahydropyrans.
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