Synthesis of Unsymmetrical Diarylethynes by Pd(0)/Cu(I)-Cocatalyzed Sila-Sonogashira—Hagihara Coupling Reactions of Alkynylsilanes with Aryl Tosylates or Mesylates.

Palladium/copper-cocatalyzed cross-coupling reactions of alkynylsilanes with aryl tosylates or mesylates afforded the corresponding unsymmetrical diarylethynes in moderate to good yields. The optim...