1. For representative reviews see: (a) G. Yin, X. Mu, G. Liu, Acc. Chem. Res. 49(2016), 2413-2423; (b) A. Vasseur, J. Bruffaerts and I. Marek, Nat. Chem. 8(2016), 209-219; (c) H. Sommer, F. Julia-Hernandez, R. Martin and I. Marek; (c) J.-S. Zhang, L. Liu, T. Chen and L.-B. Han, Chem. Asian. J. 13(2018), 2277-2291; (d) C. Najera, I. P. Beletskaya and M. Yus, Chem. Soc. Rev. 48(2019), 4515-4618; (e) Y. Li, D. Wu, H. G. Cheng and G. Yin, Angew. Chem. In. Ed. 59(2020), 7990-8003; (f) X. Chen, F. Xiao and W.-M. He, Org. Chem. Front. 8(2021), 5206-5228.
2. For selected examples, see: (a) L. Dian, D. S. Muller and I. Marek, Angew. Chem. In. Ed. 56(2017), 6783-6787
3. (b) M.cSimaan and I. Marek, Angew. Chem. In. Ed. 57(2018), 1543-1546
4. (c) R. S. Mega, V. K. Duong, A. Noble and V. K. Aggarwal, Angew. Chem. In. Ed. 59(2020), 4375-4379
5. (d) H. Wang, C.-F. Liu, T.-D. Tan, K. R. B. Khoo and M. J. Koh, ACS Catal. 12(2021), 724-732