Ruthenium(II)‐Catalyzed Regioselective Synthesis of Allyl Ketones from Alkynes and their Silver(I)‐Catalyzed Hydroarylation into γ‐Functionalized Ketones |
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Authors: | Min Zhang,Huanfeng Jiang,Pierre H. Dixneuf |
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Abstract: | The regioselective synthesis of β,γ‐unsaturated ketones from terminal alkynes is achieved by cooperative action of tris(acetonitrile)pentamethylcyclopentadieneruthenium hexafluorophosphate [Cp*Ru(NCMe)3+ PF6−] and para‐toluenesulfonic acid catalysts. These allyl ketones undergo direct regioselective hydroarylation/Friedel–Crafts reaction to introduce an electron‐rich aryl group at the γ‐position in the presence of ligand‐free silver triflate (AgOTf) catalyst. Both catalytic reactions take place with atom economy and provide an alternative to the synthesis of a variety of allyl ketones and γ‐arylated ketones. |
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Keywords: | allyl ketones atom economy γ ‐functionalized ketones ruthenium catalysts sequential catalysis silver catalysts |
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