Enantioselective Amine-Catalyzed [4+2] Annulations of Allene Ketones and 2,3-Dioxopyrrolidine Derivatives: Synthesis of 4H-Pyran Derivatives

Shuang Zhang, Yong-Chun Luo, Xiu-Qin Hu, Zhu-Yin Wang, Yong-Min Liang, and Peng-Fei Xu*

https://doi.org/10.1021/acs.joc.5b00961