Reported herein is the isolation and characterization, for the first time,o fas-gold allenyl complex as an intermediate in gold catalysis.T his intermediate was captured during the study of anovel gold(I)-catalyzed propargylation of carbonyl compounds with propargylsilanes.Notably,the goldcatalyzedp ropargylation reaction, which proceeds with aldehydes and ketones,c an be driven to the formation of either homopropargyl silyl ethers or the in situ synthesis of corresponding 2-silyl-4,5-dihydrofurans.