Abstract
[reaction: see text]. Disubstituted alkynes reacted with alkenyl iodide in the presence of a catalytic amount of Pd(OAc)2 and Ag2CO3 to give pentasubstituted fulvene derivatives in excellent yields. Other Ag salts such as AgNO3, AgBF4, and AgOTf are not effective, whereas a combination of AgNO3 and K2CO3 has a remarkable effect on the formation of fulvene.
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