Guo-Ke Zhang, Shu-Fang Wu, Chen Zhong, Yu-Qi Liu, Da-Hua Wang*, Yu-Chen Zhang*and Feng Shi*, Copper-Catalyzed α,β-Regioselective (2+4) Cycloaddition of Propargylic Esters, Eur. J. Org. Chem. 2023, e202300802. DOI:10.1002/ejoc.202300802