Copper‐catalyzed Alkenylation and Alkenyloxylation with‐Alkenyl(phenyl)iodonium Salts

An efficient and straightforward Cu‐catalyzed vinylation method for alkenyl ethers has been developed. This method demonstrates outstanding performance, delivering high yields and remarkable stereoselectivities for both cyclic and chain alkenyl ether substrates. Furthermore, we have successfully applied this method to directly vinylate the C‐2 position of protected glucals, offering a valuable tool for their functionalization. Moreover, through the utilization of alkenyl alcohols as substrates, we accomplished a 1,2‐alkenyloxylation of alkenyl double bond, enabling the synthesis of functionalized cyclic ether compounds with five or six‐membered rings.