Shu-Fang Wu, Guo-Ke Zhang, Xue Wang, Zhuo-Jing He, Yu-Chen Zhang,* and Feng Shi*. Organocatalytic Diastereoselective (4 + 1) Cycloaddition of o‑Hydroxyphenyl-Substituted Secondary Phosphine Oxides, J. Org. Chem. 2023, DOI: 10.1021/acs.joc.3c01990