Abstract
AbstractWe established a strategy for the copper‐catalyzed three‐component 1,4‐phosphinoylcyanation of 1,3‐enynes with diarylphosphine oxides and trimethylsilyl cyanide. The reaction produced various tetrasubstituted phosphinoyl‐ and cyano‐containing allenes with high functional group compatibilities in good yields under mild reaction conditions. A preliminary reaction mechanism involving the formation of phosphinoyl radicals and their regioselective addition to 1,3‐enynes was also proposed.
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