Abstract Palladium‐catalyzed reaction of 1‐alkenylboronates with vinylic halides: (1 Z ,3 E )‐1‐phenyl‐1,3‐octadiene intermediate: (E)‐1‐Hexenyl‐1,3,2‐benzodioxaborole. reactant: 6.7 mL (60 mmol) of catecholborane product: (1Z,3E)‐1‐phenyl‐1,3‐octadiene