Abstract
Versatile and practical: Intermolecular hydroacylation of internal alkynes takes place in the presence of Ru catalysts together with HCO(2)Na and Xantphos to give the corresponding conjugated enones. Aromatic aldehydes with or without coordinating groups could be used in the present catalytic system. The solid Ru/CeO(2) catalysts can be recycled for several times without significant decreases in yield (see scheme).
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