A Catalytic Asymmetric Hetero-Diels–Alder Reaction of Olefinic Azlactones and Isatins: Facile Access to Chiral Spirooxindole Dihydropyranones

Tai-Ping Gao, Jun-Bing Lin, Xiu-Qin Hu and Peng-Fei Xu*

https://doi.org/10.1039/C4CC03896G