A general and efficient procedure for the selective Meyer–Schuster isomerization of both, terminal and internal alkynols, has been developed by using catalytic amounts of the readily accessible oxovanadium(V) complex [V(O)Cl(OEt)2]. Reactions proceeded smoothly in toluene at 80 °C under microwave irradiation to provide the corresponding α,β-unsaturated carbonyl compounds in excellent yields and short times without the assistance of any additive.
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