The reactions of the bromoallenes (1) and the prop-2-ynyl acetates (3) with CuCl in dimethylformamide (DMF) at room temperature both afford the conjugated diallenes (2) in good yield.
F. Toda and Y. Takehira, J. Chem. Soc., Chem. Commun., 1975, 174 DOI: 10.1039/C39750000174
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