Hao Chen, Shuang Yang, Ning-Yi Wang, Ya-Ping Tian, Yu-Chen Zhang*, Feng Shi*, Organocatalytic Asymmetric (3+3) Cycloaddition of 4-Hydroxycoumarins with α,β-Unsaturated Aryl Esters, ChemCatChem 2024. DOI:10.1002/cctc.202401925