Abstract
AbstractThe low loading combination of the complex [9,9‐dimethyl‐4,5‐bis(diphenylphosphino)xanthene] (Xantphos)copper(I) iodide and simple ligand‐free palladium(II) acetate was found to be efficient for the domino synthesis of diarylalkynes by the reaction of aryl halides with trimethylsilylethynylene or bis(trimethylsilyl)acetylene in a single‐step procedure. The unsymmetrical diarylalkynes can be obtained through a one‐pot two‐step approach. The reactions of aryl bromides with 1,4‐bis(trimethylsilyl)butadiyne also furnished the corresponding 1,4‐diaryl‐1,3‐diynes in a similar fashion. This route to diarylalkynes and 1,4‐diaryl‐1,3‐diynes is complementary to previously reported synthetic procedures.magnified image
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