Efficient Synthesis of Spirocyclic Nucleosides via Michael Addition-Initiated Intermolecular Cyclopropanation Reaction
Hao Erjun, Zhang Qing, Zhang Qiying, Qu Guirong, Yang Xining, Guo Haiming
Chinese Journal of Organic Chemistry . 2019, (11): 3237 -3243 .  DOI: 10.6023/cjoc201904074