Copper‐Catalyzed Regio‐ and Stereoselective Conjugate Allylation of Electron‐Deficient Alkynes with Allylboronates under Mild Conditions

Conjugate allylation of a variety of electron-deficient alkynes with allylboronate (II) proceeds smoothly in the presence of Cu(II) catalyst to afford 1,4-dienes, e.g. (III) or (VIII), in high yields.