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A linear η2-alkyne π complex of [Ph3PAu]+, namely Au(I) π-bis(tert-butyldimethylsilyl)acetylene triphenylphosphine complex (1), was prepared and characterized. The new complex is found to be shelf-stable and effective for a range of the Au(I)-catalyzed alkyne π activation reactions, including a glycosylation reaction with glycosyl ortho-alkynylbenzoates as donors.

Graphical abstract: Au(i) π-bis(tert-butyldimethylsilyl)acetylene triphenylphosphine complex, an effective pre-catalyst for Au(i)-catalyzed reactions

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