Asymmetric Organocatalytic [4 + 1] Annulations Involving a Polarity Reversal Process: A Tandem Catalytic Approach to Highly Functionalized Spiropyrazolone Derivatives

Chang-Yin Tan, Hong Lu, Jia-Lu Zhang, Jin-Yu Liu, and Peng-Fei Xu*

https://doi.org/10.1021/acs.joc.9b02684