Palladium‐Catalyzed Allylation of Vinylethylene Carbonates with β ‐Ketophosphonates: Stereoselective Synthesis of ( Z )‐Homoallylic Phosphonates

A first simple palladium catalyzed allylation of vinylethylene carbonates with β ‐ketophosphonates has been developed. This method provides access to ( Z )‐tri‐ and tetrasubstituted homoallylic phosphonates with exclusive regioselectivity, chemoselectivity and ( Z )‐stereoselectivity. The reaction tolerates a wide substrate scope of vinylethylene carbonates and β ‐ketophosphonates with electron‐donating and electron‐withdrawing groups and works well on the gram scale.