A C1-symmetric N-heterocyclic carbene catalyzed oxidative spiroannulation of isatin-derived enals: highly enantioselective synthesis of spirooxindole -lactones

Jun-Bing Lin, Xi-Na Cheng, Xiao-Dong Tian, Guo-Qiang Xu, Yong-Chun Luo and Peng-Fei Xu*

https://doi.org/10.1039/C8RA02009D