A New Ruthenium-Catalyzed Cleavage of a Carbon−Carbon Triple Bond: Efficient Transformation of Ethynyl Alcohol into Alkene and Carbon Monoxide

Abstract
We report a new and efficient ruthenium-catalyzed reaction that transforms ethynyl alcohol into alkene and carbon monoxide. The most efficient catalysts are TpRu(PPh3)(CH3CN)2PF6 (10 mol %) and lithium triflate (20 mol %). The mechanism of this reaction was elucidated using an isotope-labeling experiment.