“…Dicationic [Ru(MeCN)(pcymene)(bisoxazoline)](BF 4 ) 2 complexes were also used for the propargylation of furan and arene derivatives. [233] The most general results in the direct propargylation with propargylic alcohols were obtained in the presence of thiolate-bridged binuclear ruthenium precatalysts in the series [(Cp*)RuCl(m 2 -SR) 2 RuCl(Cp*)] by Nishibayashi et al [230] This ruthenium-catalyzed substitution of propargylic alcohols proceeded successfully with a variety of oxygen, nitrogen, phosphorus, sulfur, and carbon nucleophiles, including aliphatic alcohols, [230,237,238] phenols, [230,239] aromatic amines, [237,238] amides, [237,238] phosphine oxides, [237] thiols, [237,240] ketones, [238,[241][242][243][244][245] aromatic heterocycles, [238,246] and olefins [247] (Scheme 57). This catalyst also effects the dehydration of propargylic alcohols.…”