33. Kaki, R. B.;  Han, W.;  Chen, J.-B.;  Li, Y.;  Tang, Y.;  Zhang, W.;  Xu, W.*; Xu, S.*, Three-Component Reaction of Phosphorus Ylides with Isocyanates: Facile Synthesis of 2-Amino-3-Carboxylate-4-Quinolones. Chem. Commun. 2020, doi: 10.1039/D0CC01401J.


32. Kaki, R. B; He, X.; Xu, S.*, Lewis Base Catalysis Based on Homoconjugate Addition: Rearrangement of Electron-Deficient Cyclopropanes and Their Derivatives. Synlett 2020, 31 (02), 117-124.

31. He, X.; Tang, Y.; Wang, Y.; Chen, J.-B.; Xu, S.*; Dou, J.; Li, Y.*, Phosphine-Catalyzed Activation of Alkylidenecyclopropanes: Rearrangement to Form Polysubstituted Furans and Dienones. Angew. Chem., Int. Ed. 2019, 58 (31), 10698-10702.

30. Li, Y.*; Shi, D.; He, X.; Wang, Y.; Tang, Y.; Zhang, J.; Xu, S.*, Redox-Neutral Annulation of Alkynylcyclopropanes with N-aryloxyamides via Rhodium(III)-Catalyzed Sequential C−H/C−C Activation. J. Org. Chem. 201984 (3)1588-1595.