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1.8.1.3 Reactions Involving Ruthenium–Arene Complexes

DOI: 10.1055/sos-SD-001-00899

Chatani, N.Science of Synthesis, (20011937.

Rutheniumarene complexes have been widely used in the preparation of a wide range of ruthenium complexes and have also been used as catalysts because of their high activity for the hydrogenation of alkenes and ketones. Complex 1 has been reported to catalyze the hydrogenation of alkenes.[‌20‌] Other rutheniumarene complexes, including [RuCl(H)(η6-C6Me6)(PPh3)] (18), also have high catalytic activity for the hydrogenation of alkenes even benzene under mild reaction conditions, as well as for the transfer hydrogenation of alkenes with secondary alcohols.[‌21‌] [RuCl(H)(η6-C6Me6)(PPh3)] (18) is prepared from the reaction between [RuCl2(η6-C6Me6)(PPh3)] (17) and sodium borohydride (or LiAlH4) in tetrahydrofuran, or by heating 17 with aqueous sodium carbonate in propan-2-ol (Scheme 13).[‌21‌] It can also be prepared directly from [Ru2(μ-Cl)2Cl2(η6-C6Me6)2] (3) by heating with a threefold excess of triphenylphosphine and anhydrous sodium carbonate in propan-2-ol (Scheme 13).[‌22‌,‌23‌]

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