Abstract
Palladium-catalyzed decarboxylative alkynylation of α-acyloxyketones triggered by C(sp3 )-O bond cleavage is disclosed. The decarboxylation strategy featuring a neutral reaction condition enabled an unprecedent catalytic alkynylation of a ketone enolate. The reaction was applied to a variety of substrates, giving desired products in good yields. We successfully obtained X-ray crystallography of a new palladium-enolate intermediate that was synthesized by a reaction of [Pd(cod)(CH2 TMS)2 ] with XPhos and α-acyloxyketone at room temperature, indicating facile C(sp3 )-O bond disconnection.
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