Synthesis of allenynes via Pd-catalyzed coupling of 1,4-diyn-3-yl carbonates with boronic acids

A palladium-catalyzed cross-coupling reaction of 1,4-diyn-3-yl carbonates with organoboronic acids for a series of conjugated allenynes using S-phos or Gorlos-phos as the ligand under mild conditions has been developed.