@article{li_shi_xiang_liu_zheng_2024,  title={FeCl<sub>3</sub>-Catalyzed Cross-Coupling for Improving the Synthesis of Upadacitinib},  volume={35},  ISSN={0103-5053},  url={https://doi.org/10.21577/0103-5053.20230165},  DOI={10.21577/0103-5053.20230165},  number={4},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Li, Ziling and Shi, Chundiao and Xiang, Shengchang and Liu, Chulong and Zheng, Ximing},  year={2024},  pages={e–20230165} }