Angewandte Chemie International Edition
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Cover Picture: Novel Ruthenium- and Platinum-Catalyzed Sequential Reactions: Synthesis of Tri- and Tetrasubstituted Furans and Pyrroles from Propargylic Alcohols and Ketones (Angew. Chem. Int. Ed. 23/2003)
A One-Pot Sequential Reaction for the ruthenium- and platinum-catalyzed preparation of a trisubstituted furan from a propargylic alcohol and acetone in good yield with high regioselectivity is shown. Two different catalysts, the thiolate-bridged diruthenium complex [Cp*RuCl(μ2-SMe)RuCp*Cl] (Cp*=C5Me5) and PtCl2, sequentially promote each catalytic cycle in the same medium. For more information, see the Communication by M. Hidai, S. Uemura, and co-workers on pp. 2681 ff.