Scharf, M. J.; Tsuji, N.; Lindner, M. M.; Leutzsch, M.; Lõkov, M.; Parman, E.; Leito, I.; List, B. Highly Acidic Electron-Rich Brønsted Acids Accelerate Asymmetric Pictet–Spengler Reactions by Virtue of Stabilizing Cation–π Interactions. Journal of the American Chemical Society2024, 146, 28339–28349.