1. Xue-Liang Huang, Lin He, Pan-Lin Shao, Song Ye*, "[4+2] Cycloaddition of Ketenes with N-Benzoyldiazenes Catalyzed by N-Heterocyclic Carbenes." Angew. Chem. Int. Ed. 2009, 48, 192-195.  PDF

2. Hui Lv, Lin You, Song Ye*. "Enantioselective Synthesis of Dihydrocoumarins via N-Heterocyclic Carbene-Catalyzed Cycloaddition of Ketenes and o-Quinone Methides." Adv. Synth. Catal. 2009, 351, 2822-2826. PDF

3. Xiao-Na Wang, Pan-Lin Shao, Hui Lv, Song Ye*. "Enantioselective synthesis of beta-trifluoromethyl-β-lactones via NHC-catalyzed ketene-ketone cycloaddition reactions." Org. Lett. 2009, 11, 4029-4031. PDF

4. Xue-Liang Huang, Xiang-Yu Chen, Song Ye.* "Enantioselective synthesis of aza-β-lactams via NHC-catalyzed [2+2] cycloaddition of ketenes with diazenedicarboxylates." J. Org. Chem. 2009, 74, 7585-7587. PDF

5. Xiao-Na Wang, Hui Lv, Xue-Liang Huang, Song Ye*. "Asymmetric esterification of ketenes catalyzed by an N-heterocyclic carbene." Org. Biomol. Chem. 2009, 346-350. PDF