Ping Zhao, Yunshun Deng, Pinhong Chen, Guosheng Liu. "Copper-Catalyzed Asymmetric Alkynylation of
                    <i>sp</i>
                    <sup>2</sup>
                    Allenic C–H Bonds for the Synthesis of Skipped Diynes." Journal of the American Chemical Society, 2025. doi:10.1021/jacs.5c19257