Sylvie Dérien, Beatriz Gomez Vicente and Pierre H. Dixneuf
The regioselective carbon–carbon coupling of prop-2-yn-1-ols with allyl alcohol is achieved in the presence of the ruthenium(II) catalyst RuCl(cod)(C5Me5) and leads to either 2-hydroxy- or 2-allyloxy-5-methylenetetrahydropyrans.