Heteropolyacid-catalyzed direct deoxygenation of propargyl and allyl alcohols

摘要

The combination of H _3[PW _(12)O _(40)] ?nH _2O (1 mol %) and Et _3SiH led to the direct catalytic deoxygenation of propargyl alcohols, in which proper solvent selection Cl(CH _2) _2Cl vs CF _3CH _2OH was the key to obtaining better product yields. Under similar conditions, the deoxygenation of allyl alcohols proceeded to give thermodynamically stable alkenes with migration of the double bonds in good yields.